JP7557895B2 - Organic electroluminescent material and device thereof - Google Patents

Description

The present invention relates to a compound used in an organic electronic device such as an organic electroluminescence device. More particularly, the present invention relates to a heterocyclic compound having a structure represented by formula 1, an organic electroluminescence device containing the compound, and a compound composition containing the compound.

Organic electronic devices include, but are not limited to, organic light emitting diodes (OLEDs), organic field effect transistors (O-FETs), organic light emitting transistors (OLETs), organic photovoltaic cells (OPVs), dye-sensitized solar cells (DSSCs), organic photodetectors, organic photosensitive devices, organic field effect devices (OFQDs), light emitting electrochemical cells (LECs), organic laser diodes, and organic plasma light emitting devices.

In 1987, Tang and Van Slyke of Eastman Kodak reported a bilayer organic electroluminescent device containing an arylamine hole transport layer and a tris-8-hydroxyquinoline-aluminum layer as the electron transport layer and the light emitting layer (Applied Physics Letters, 1987, 51(12):913-915). Once a bias is applied to the device, green light is emitted from the device. This invention laid the foundation for the development of modern organic light emitting diodes (OLEDs). The most advanced OLEDs may contain multiple layers, such as charge injection and transport layers, charge and exciton blocking layers, and one or more light emitting layers between the cathode and anode. OLEDs are self-emissive solid-state devices, offering enormous potential for display and lighting applications. Additionally, the inherent properties of organic materials, such as their flexibility, make them highly suitable for specialized applications such as fabrication on flexible substrates.

OLEDs are divided into three different types according to their emission mechanism. The OLED invented by Tang and van Slyke is a fluorescent OLED, which uses only singlet emission. This limitation impedes the commercialization of OLEDs, since the triplets generated in the device are wasted by non-radiative decay pathways, and the internal quantum efficiency (IQE) of fluorescent OLEDs is only 25%. In 1997, Forrest and Thompson reported phosphorescent OLEDs that use triplet emission from heavy metal containing complexes as emitters. Therefore, singlets and triplets can be harvested and 100% IQE can be achieved. Due to its high efficiency, the discovery and development of phosphorescent OLEDs directly contributes to the commercialization of active matrix OLEDs (AMOLEDs). Recently, Adachi has achieved high efficiency through thermally activated delayed fluorescence (TADF) of organic compounds. These emitters have a small singlet-triplet gap, allowing the exciton to transition from triplet back to singlet. In TADF devices, the high IQE is due to triplet excitons threading between reverse systems (reverse intersystem crossing) to generate singlet excitons.

OLEDs may be further divided into small molecule and polymer OLEDs depending on the form of the material required. Small molecules refer to materials that are not polymeric, either organic or organometallic, and the molecular weight of small molecules may be large as long as they have a precise structure. Dendrimers, which have a well-defined structure, are considered small molecules. Polymer OLEDs include conjugated polymers and non-conjugated polymers with side-chain emissive groups. Small molecule OLEDs can become polymer OLEDs when post-polymerization occurs during the manufacturing process.

Various methods for manufacturing OLEDs are known. Small molecule OLEDs are typically manufactured by vacuum thermal evaporation. Polymer OLEDs are manufactured by solution processes, e.g. spin coating, inkjet printing and nozzle printing. Small molecule OLEDs can also be manufactured by solution processes, provided the materials can be dissolved or dispersed in a solvent.

The emission color of an OLED can be achieved by the structural design of the emitting material. An OLED may include one or more emitting layers to achieve a desired spectrum. In green, yellow, and red OLEDs, phosphorescent materials have already been successfully commercialized, but blue phosphorescent elements still have problems such as blue not being saturated, short service life, and high operating voltage. Commercial full-color OLED displays generally use a mixed strategy, using blue fluorescence and yellow, red, or green phosphorescence. Currently, there is a problem that the efficiency of phosphorescent OLEDs drops rapidly at high brightness. It is also desirable to have a more saturated emission spectrum, higher efficiency, and longer device service life.

CN113227085A discloses an organic compound represented by the following formula, and an organic light-emitting device containing the compound.

（ただし、Ａｒ_２およびＡｒ_３は、それぞれ独立して水素、または置換または非置換のＣ_６－６０アリール基であり、Ｌは、フェニレン基、ビフェニルジイル基、テルフェニルジイル基、ナフタレンジイル基、またはナフタレン基で置換されたフェニレン基である。）

(wherein Ar ₂ and Ar ₃ are each independently hydrogen or a substituted or unsubstituted C _6-60 aryl group, and L is a phenylene group, a biphenyldiyl group, a terphenyldiyl group, a naphthalenediyl group, or a phenylene group substituted with a naphthalene group.)

Among the specific structures disclosed in the application, the following compounds are disclosed:

The application discloses a triazine-skeleton compound that must have a directly bonded dibenzothiophene group, but does not disclose or teach the compound having the structure represented by formula 1 of the present application, or its use in an organic electroluminescence device.

WO2019190101A1 discloses an organic light-emitting device in which the light-emitting layer contains an organic compound having the following general structural formula:

（ただし、Ｘ^２は、Ｎ－Ｌ^６－Ａｒ^７、Ｏ、Ｓ、またはＣＲ’Ｒ’’である。）

(wherein X ² is N-L ⁶ -Ar ⁷ , O, S, or CR′R″.)

It is further disclosed that the compound may have the following secondary general formula structure:

Among the specific structures disclosed in the application, the following compounds are disclosed:

および

and

The application does not disclose or teach compounds having the structure represented by formula 1 according to the present application, and in particular does not disclose or teach compounds having a substituted or unsubstituted phenyl group at the 1-position of a diphenyl 5-membered ring bonded to a triazine by ^L3 or ^L5 , and the use thereof in an organic electroluminescence device.

且つ、Ａｒ^１～Ａｒ^３のうちの少なくとも１つは、以下の構造を有する。

US20190198775A1 discloses a combination comprising a compound having the following general structure:

and at least one of Ar ¹ to Ar ³ has the following structure:

It is further disclosed that the compound may have the following secondary general formula structure:

Among them, the specific structures disclosed are as follows:

および

and

The application discloses many compounds that simultaneously have a dibenzo 5-membered heterocycle and a triazine structure, but does not disclose or teach the compound having the structure represented by formula 1 of the present application or its effect on the performance of the device.

CN108250189A discloses an organic compound represented by the following formula, and an organic light-emitting device containing the compound.

（ただし、Ｘは、Ｏ、ＳまたはＳｉＲ_５Ｒ_６であり、Ｒ_１ａ～Ｒ_４ａは、それぞれ独立してＬ_１－ＨＡｒ_１またはＡ_１であり、Ｒ_１ａ～Ｒ_４ａのうちの少なくとも１以上は、Ｌ_１－ＨＡｒ_１であり、Ｒ_１ｂ～Ｒ_４ｂは、それぞれ独立してＬ_２－ＨＡｒ_２またはＡ_２であり、Ｒ_１ｂ～Ｒ_４ｂのうちの少なくとも１以上は、Ｌ_２－ＨＡｒ_２であり、ＨＡｒ_１およびＨＡｒ_２は、それぞれ独立して

であってもよく、且つＸ_１～Ｘ_３のうちの少なくとも２つは、Ｎから選ばれる。）

(wherein X is O, S or SiR ₅ R ₆ ; R _1a to R _4a are each independently L ₁ -HAr ₁ or A ₁ ; at least one of R _1a to R _4a is L ₁ -HAr ₁ ; R _1b to R _4b are each independently L ₂ -HAr ₂ or A ₂ ; at least one of R _1b to R _4b is L ₂ -HAr ₂ ; and HAr ₁ and HAr ₂ are each independently

and at least two of X ₁ to X ₃ are selected from N.

Among the specific structures disclosed in the application, the following compounds are disclosed:

および

and

The application does not disclose or teach compounds having the structure represented by formula 1 of the present application, and in particular does not disclose or teach compounds in which the 1-position of dibenzofuran is a substituted or unsubstituted phenyl group, or the effect on the performance of the device.

CN110294703A discloses a compound represented by a combination of Chemical Formula 1 and Chemical Formula 2, and an organic light-emitting device containing the compound.

（ただし、Ｘ^１およびＸ^２は、独立してＯまたはＳであり、化学式１における隣り合う２つの＊は、化学式２における＊に結合する。）

(Note that ^X1 and ^X2 are independently O or S, and two adjacent * in Chemical Formula 1 are bonded to * in Chemical Formula 2.)

Among the specific structures disclosed in the application, the following compounds are disclosed:

および

and

The application does not disclose or teach the compound having the structure represented by formula 1 of the present application or its effect on the performance of the device.

CN113227085A WO2019190101A1 US20190198775A1 CN108250189A CN110294703A

Applied Physics Letters, 1987, 51(12):913-915

The present invention aims to provide a series of heterocyclic compounds having a structure represented by formula 1 in order to solve at least part of the above-mentioned problems. These novel compounds can be applied to organic electroluminescence devices, and can provide better device performance, particularly improved device life, by being used, for example, as a host material, transport material, etc. in the organic electroluminescence device.

According to one embodiment of the present invention, a compound having a structure represented by formula 1 is disclosed.

（Ｘは、Ｏ、ＳまたはＳｅから選ばれ、
Ｘ_１～Ｘ_６は、出現毎に同一または異なってＣＲ_ｘまたはＮから選ばれ、
Ｚ_１～Ｚ_８は、出現毎に同一または異なってＣ、ＣＲ_ｚまたはＮから選ばれ、且つＺ_１～Ｚ_４のうちの１つは、Ｃから選ばれ、Ｌ_２に結合し、
Ａｒは、出現毎に同一または異なって置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、またはこれらの組合せから選ばれ、
Ｌ_１は、出現毎に同一または異なって置換または非置換の炭素原子数６～３０のアリーレン基、置換または非置換の炭素原子数３～１６のヘテロアリーレン基、またはこれらの組合せから選ばれ、
Ｌ_２は、出現毎に同一または異なって単結合、置換または非置換の炭素原子数６～３０のアリーレン基、置換または非置換の炭素原子数３～３０のヘテロアリーレン基、またはこれらの組合せから選ばれ、
Ｒ_ｙは、出現毎に同一または異なって一置換、複数置換または無置換を表し、
Ｒ_ｘおよびＲ_ｚは、出現毎に同一または異なって水素、重水素、ハロゲン、置換または非置換の炭素原子数１～２０のアルキル基、置換または非置換の環炭素原子数３～２０のシクロアルキル基、置換または非置換の炭素原子数１～２０のヘテロアルキル基、置換または非置換の環原子数３～２０のヘテロ環基、置換または非置換の炭素原子数７～３０のアラルキル基、置換または非置換の炭素原子数１～２０のアルコキシ基、置換または非置換の炭素原子数６～３０のアリールオキシ基、置換または非置換の炭素原子数２～２０のアルケニル基、置換または非置換の炭素原子数２～２０のアルキニル基、置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、置換または非置換の炭素原子数３～２０のアルキルシリル基、置換または非置換の炭素原子数６～２０のアリールシリル基、置換または非置換の炭素原子数３～２０のアルキルゲルマニウム基、置換または非置換の炭素原子数６～２０のアリールゲルマニウム基、置換または非置換の炭素原子数０～２０のアミノ基、アシル基、カルボニル基、カルボキシル基、エステル基、シアノ基、イソシアノ基、ヒドロキシル基、スルファニル基、スルフィニル基、スルホニル基、ホスフィノ基、およびこれらの組合せからなる群から選ばれ、
Ｒ_ｙは、出現毎に同一または異なって水素、重水素、ハロゲン、置換または非置換の炭素原子数１～２０のアルキル基、置換または非置換の環炭素原子数３～２０のシクロアルキル基、置換または非置換の炭素原子数１～２０のヘテロアルキル基、置換または非置換の環原子数３～２０のヘテロ環基、置換または非置換の炭素原子数７～３０のアラルキル基、置換または非置換の炭素原子数１～２０のアルコキシ基、置換または非置換の炭素原子数６～３０のアリールオキシ基、置換または非置換の炭素原子数２～２０のアルケニル基、置換または非置換の炭素原子数２～２０のアルキニル基、置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、置換または非置換の炭素原子数３～２０のアルキルシリル基、置換または非置換の炭素原子数６～２０のアリールシリル基、置換または非置換の炭素原子数３～２０のアルキルゲルマニウム基、置換または非置換の炭素原子数６～２０のアリールゲルマニウム基、アシル基、カルボニル基、カルボキシル基、エステル基、シアノ基、イソシアノ基、ヒドロキシル基、スルファニル基、スルフィニル基、スルホニル基、ホスフィノ基、およびこれらの組合せからなる群から選ばれ、
隣り合う置換基Ｒ_ｘは、結合して環を形成していてもよく、
隣り合う置換基Ｒ_ｙは、結合して環を形成していてもよく、
隣り合う置換基Ｒ_ｚは、結合して環を形成していてもよい。）

X is selected from O, S or Se;
X ₁ to X ₆ are each identically or differently selected from CR _x or N at each occurrence;
Z ₁ to Z ₈ are, at each occurrence, the same or different, selected from C, _CRz or N, and one of Z ₁ to Z ₄ is selected from C and is bonded to L ₂ ;
Ar, at each occurrence, is the same or different and is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;
L ₁ is, each occurrence, the same or different, selected from a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 16 carbon atoms, or a combination thereof;
_L2 , each occurrence, is the same or different and is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof;
R _y is the same or different at each occurrence and represents mono-, poly- or no substitution;
R _x and R _z each occur the same or different and each represent a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted carbon a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, hydroxyl group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof,
R _y each occurrence may be the same or different and is selected from hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl ... a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxyl group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
Adjacent substituents R _x may be bonded to form a ring,
Adjacent substituents R _y may be bonded to form a ring,
Adjacent substituents R _z may be bonded to form a ring.

According to another embodiment of the present invention, there is disclosed an organic electroluminescence element including an anode, a cathode, and an organic layer provided between the anode and the cathode, in which at least one of the organic layers includes a compound described in the above embodiment.

According to another embodiment of the present invention, a compound composition is further disclosed that includes the compound described in the above embodiment.

The present invention discloses a series of heterocyclic compounds having a structure represented by formula 1. These novel compounds can be applied to organic electroluminescence devices, and can provide better device performance, especially improved device service life, and can significantly improve the overall performance of the device.

1 is a schematic diagram of an organic light emitting device that may include compounds and compound compositions according to the present invention. 1 is a schematic diagram of another organic light emitting device that may include compounds and compound compositions according to the present invention.

OLEDs can be fabricated on a variety of substrates, such as glass, plastic, and metal. FIG. 1 illustrates an organic light-emitting device 100 by way of example and not by way of limitation. The drawings are not necessarily drawn to scale, and some layer structures may be omitted in the drawings, as appropriate. The device 100 may include a substrate 101, an anode 110, a hole injection layer 120, a hole transport layer 130, an electron blocking layer 140, an emissive layer 150, a hole blocking layer 160, an electron transport layer 170, an electron injection layer 180, and a cathode 190. The device 100 may be fabricated by depositing the layers described, in order. The properties, functions, and exemplary materials of each layer are described in more detail in columns 6-10 of US Pat. No. 7,279,704 B2, the entire contents of which are incorporated herein by reference.

There are many examples of each of these layers. Illustratively, a flexible and transparent substrate-anode combination is disclosed in U.S. Pat. No. 5,844,363, which is incorporated herein by reference in its entirety. For example, U.S. Pat. App. Pub. No. 2003/0230980, which is incorporated herein by reference in its entirety, discloses an example of a p-doped hole transport layer that is m-MTDATA doped with F ₄ -TCNQ at a molar ratio of 50:1. Example host materials are disclosed in U.S. Pat. No. 6,303,238 to Thompson et al., which is incorporated herein by reference in its entirety. For example, U.S. Pat. App. Pub. No. 2003/0230980, which is incorporated herein by reference in its entirety, discloses an example of an n-doped electron transport layer that is BPhen doped with Li at a molar ratio of 1:1. Examples of cathodes are disclosed in U.S. Patent Nos. 5,703,436 and 5,707,745, which are incorporated by reference in their entirety, including composite cathodes having a thin metal layer, such as Mg:Ag, and a sputter-deposited transparent conductive ITO layer coated thereon. U.S. Patent No. 6,097,147 and U.S. Patent Application Publication No. 2003/0230980, which are incorporated by reference in their entirety, describe the principles and use of blocking layers in more detail. Examples of injection layers are provided in U.S. Patent Application Publication No. 2004/0174116, which is incorporated by reference in its entirety. Protective layers are described in U.S. Patent Application Publication No. 2004/0174116, which is incorporated by reference in its entirety.

The above-mentioned split layer structure is provided by way of non-limiting examples. The functionality of an OLED can be realized by combining the various layers described above, or some layers can be omitted entirely. It may also include other layers not explicitly described. Within each layer, a single material or a mixture of multiple materials can be used to achieve optimal performance. Any of the functional layers may include multiple sub-layers, for example, an emissive layer may have two layers of different emissive materials to achieve a desired emission spectrum.

In one embodiment, an OLED may be described as having an "organic layer" disposed between a cathode and an anode. The organic layer may include one or more layers.

OLEDs also require an encapsulation layer, and as shown in FIG. 2, an organic light-emitting device 200 is shown by way of example and without limitation. The difference from FIG. 1 is that it may include an encapsulation layer 102 on the cathode 190 to prevent harmful substances from the outside, such as moisture and oxygen. Any material that can provide an encapsulation function, such as glass or an organic-inorganic mixed layer, may be used as the encapsulation layer. The encapsulation layer should be located directly or indirectly on the outside of the OLED element. Multilayer thin-film encapsulation is described in US Pat. No. 7,968,146 B2, the entire contents of which are incorporated herein by reference.

Devices manufactured according to embodiments of the present invention may be incorporated into a variety of consumer products having one or more electronic modules (or units) of the device. These consumer products include, for example, flat panel displays, monitors, medical monitors, televisions, billboards, indoor or outdoor lighting and/or signaling lamps, heads-up displays, fully or partially transparent displays, flexible displays, smartphones, flat panel computers, flat panel mobile phones, wearable devices, smart watches, laptop computers, digital cameras, portable video cameras, viewfinders, microdisplays, 3-D displays, in-vehicle displays, and tail lights.

The materials and structures described herein may also be used in other organic electronic devices listed above.

"Top" means furthest from the substrate and "bottom" means closest to the substrate. When a first layer is described as being "on" a second layer, the first layer is disposed relatively far from the substrate. Other layers may be present between the first and second layers, unless the first layer is specified as being "in contact with" the second layer. Illustratively, the cathode may be described as being "on" the anode, even if there are various organic layers between the cathode and anode.

"Solution processable" means capable of being dissolved, dispersed or transported in a liquid medium in the form of a solution or suspension, and/or capable of being deposited from a liquid medium.

It is believed that if a ligand directly enhances the photosensitizing properties of the emitter material, it may be referred to as "photosensitizing". If a ligand does not enhance the photosensitizing properties of the emitter material, it may be referred to as "auxiliary". However, it is believed that the auxiliary ligand can modify the properties of the photosensitizing ligand.

It is believed that the internal quantum efficiency (IQE) of fluorescent OLEDs may exceed the 25% spin-statistic limit due to the presence of delayed fluorescence. Delayed fluorescence may be generally divided into two types: P-type delayed fluorescence and E-type delayed fluorescence. P-type delayed fluorescence is generated by triplet-triplet annihilation (TTA).

On the other hand, E-type delayed fluorescence depends on the conversion of excited states between triplet and singlet, not on the collision of two triplets. Compounds capable of generating E-type delayed fluorescence need to have an extremely small singlet-triplet gap to convert the energy state. Thermal energy can activate the transition from triplet to singlet. This type of delayed fluorescence is also called thermally activated delayed fluorescence (TADF). The notable feature of TADF is that the delayed component increases with increasing temperature. If the rate of threading (reverse intersystem crossing) between reverse systems (RISC) is fast enough, the proportion of backfilled singlet excited states can reach 75%, minimizing non-radiative decay from triplets. The total proportion of singlets can be 100%, far exceeding the 25% of exciton spin statistics due to electro.

The characteristics of E-type delayed fluorescence can be seen from an excited complex system or a single compound. Without being limited to theory, E-type delayed fluorescence requires that the emitting material has a small singlet-triplet energy gap (ΔE _S-T ). Organic non-metal-containing donor-acceptor emitting materials may achieve this. The emission of these materials is usually characterized as donor-acceptor charge transition (CT) type emission. In these donor-acceptor type compounds, the spatial separation between the HOMO and LUMO generally produces a small ΔE _S-T . These states may include CT states. Usually, donor-acceptor emitting materials are constructed by combining an electron donor moiety (e.g., an amine group or a carbazole derivative) with an electron acceptor moiety (e.g., an N-containing six-membered aromatic ring).

Definitions of the technical terms for substituents

Halogen or halide, as used herein, includes fluorine, chlorine, bromine and iodine.

As used herein, alkyl groups include straight and branched chain alkyl groups. The alkyl groups may be alkyl groups having 1 to 20 carbon atoms, preferably alkyl groups having 1 to 12 carbon atoms, and more preferably alkyl groups having 1 to 6 carbon atoms. Examples of alkyl groups include methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, n-undecyl, n-dodecyl, n-tridecyl, n-tetradecyl, n-pentadecyl, n-hexadecyl, n-heptadecyl, n-octadecyl, neopentyl, 1-methylpentyl, 2-methylpentyl, 1-pentylhexyl, 1-butylpentyl, 1-heptyloctyl, and 3-methylpentyl. Of these, methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, neopentyl, and n-hexane are preferred. The alkyl group may be substituted.

Cycloalkyl groups, as used herein, include cyclic alkyl groups. The cycloalkyl groups may be cycloalkyl groups having 3 to 20 ring carbon atoms, and are preferably cycloalkyl groups having 4 to 10 carbon atoms. Examples of cycloalkyl groups include cyclobutyl, cyclopentyl, cyclohexyl, 4-methylcyclohexyl, 4,4-dimethylcyclohexyl, 1-adamantyl, 2-adamantyl, 1-norbornyl, and 2-norbornyl. Of these, cyclopentyl, cyclohexyl, 4-methylcyclohexyl, and 4,4-dimethylcyclohexyl are preferred. The cycloalkyl groups may also be substituted.

As used herein, a heteroalkyl group is one in which one or more carbons in an alkyl chain are replaced with a heteroatom selected from the group consisting of nitrogen, oxygen, sulfur, selenium, phosphorus, silicon, germanium, and boron. The heteroalkyl group may be a heteroalkyl group having 1 to 20 carbon atoms, preferably a heteroalkyl group having 1 to 10 carbon atoms, and more preferably a heteroalkyl group having 1 to 6 carbon atoms. Illustrative examples of heteroalkyl groups are methoxymethyl, ethoxymethyl, ethoxyethyl, methylthiomethyl, ethylthiomethyl, ethylthioethyl, methoxymethoxymethyl, ethoxymethoxymethyl, ethoxyethoxyethyl, hydroxymethyl, hydroxyethyl, hydroxypropyl, mercaptomethyl, mercaptoethyl, mercaptopropyl, aminomethyl, aminoethyl, aminopropyl, dimethylaminomethyl, trimethylgermaniummethyl, trimethylgermaniumethyl, trimethylgermaniumisopropyl, dimethylethylgermaniummethyl, dimethylisopropylgermaniummethyl, tert-butyldimethylgermaniummethyl, triethylgermaniummethyl, triethylgermaniumethyl, triisopropylgermaniummethyl, triisopropylgermaniumethyl, trimethylsilylmethyl, trimethylsilylethyl, trimethylsilylisopropyl, trimethylsilylisopropyl, triisopropylsilylmethyl, and triisopropyloylsilylethyl. The heteroalkyl group may also be substituted.

Alkenyl groups, as used herein, include linear, branched, and cyclic olefin groups. The linear alkenyl group may be an alkenyl group having 2 to 20 carbon atoms, and preferably an alkenyl group having 2 to 10 carbon atoms. Examples of alkenyl groups include vinyl, propylene, 1-butenyl, 2-butenyl, 3-butenyl, 1,3-butadienyl, 1-methylvinyl, styryl, 2,2-diphenylvinyl, 1,2-diphenylvinyl, 1-methylallyl, 1,1-dimethylallyl, 2-methylallyl, 1-phenylallyl, 2-phenylallyl, 3-phenylallyl, 3,3-diphenylallyl, 1,2-dimethylallyl, 1-phenyl-1-butenyl, 3-phenyl-1-butenyl, cyclopentenyl, cyclopentadienyl, cyclohexenyl, cycloheptenyl, cycloheptatrienyl, cyclooctenyl, cyclooctatetraenyl, and norbornylalkenyl. The alkenyl group may be substituted.

As used herein, the term "alkynyl group" includes linear alkynyl groups. The alkynyl group may be an alkynyl group having 2 to 20 carbon atoms, and is preferably an alkynyl group having 2 to 10 carbon atoms. Examples of alkynyl groups include ethynyl, propynyl, propargyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-pentynyl, 2-pentynyl, 3,3-dimethyl-1-butynyl, 3-ethyl-3-methyl-1-pentynyl, 3,3-diisopropyl-1-pentynyl, phenylethynyl, and phenylpropynyl groups. Of these, ethynyl, propynyl, propargyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-pentynyl, and phenylethynyl groups are preferred. The alkynyl group may also be substituted.

Aryl or aromatic groups, as used herein, contemplate non-fused and fused systems. The aryl group may be an aryl group having 6 to 30 carbon atoms, preferably an aryl group having 6 to 20 carbon atoms, and more preferably an aryl group having 6 to 12 carbon atoms. Examples of aryl groups include phenyl, biphenyl, terphenyl, triphenylene, tetraphenylene, naphthalene, anthracene, phenalene, phenanthrene, fluorene, pyrene, chrysene, perylene, and azulene, with phenyl, biphenyl, terphenyl, triphenylene, fluorene, and naphthalene being preferred. Examples of non-fused aryl groups include phenyl, biphenyl-2-yl, biphenyl-3-yl, biphenyl-4-yl, p-terphenyl-4-yl, p-terphenyl-3-yl, p-tribiphenyl-2-yl, m-terphenyl-4-yl, m-terphenyl-3-yl, m-terphenyl-2-yl, o-tolyl, m-tolyl, p-tolyl, p-(2-phenylpropyl)phenyl, 4'-methylbiphenyl, 4"-tert-butyl-p-terphenyl-4-yl, o-cumyl, m-cumyl, p-cumyl, 2,3-xylyl, 3,4-xylyl, 2,5-dimethylphenyl, mesitylene, and m-tetraphenyl. The aryl group may also be substituted.

Heterocyclic group or heterocycle, as used herein, considers a non-aromatic cyclic group. Non-aromatic heterocyclic groups include saturated heterocyclic groups having 3 to 20 ring atoms and unsaturated non-aromatic heterocyclic groups having 3 to 20 ring atoms, at least one ring atom of which is selected from the group consisting of nitrogen, oxygen, sulfur, selenium, silicon, phosphorus, germanium and boron atoms, and non-aromatic heterocyclic groups preferably have 3 to 7 ring atoms and include at least one heteroatom such as nitrogen, oxygen, silicon or sulfur. Examples of non-aromatic heterocyclic groups include oxiranyl, oxetanyl, tetrahydrofuranyl, tetrahydropyranyl, dioxopentyl, dioxanyl, aziridinyl, dihydropyrrole, tetrahydropyrrolyl, piperidinyl, oxazolidinyl, morpholinyl, piperazinyl, oxacycloheptatrienyl, thiacycloheptatrienyl, azacycloheptatrienyl, and tetrahydrosilole. Heterocyclic groups may also be substituted.

Heteroaryl groups, as used herein, may include non-fused and fused heteroaromatic groups having 1 to 5 heteroatoms, at least one of which is selected from the group consisting of nitrogen, oxygen, sulfur, selenium, silicon, phosphorus, germanium, and boron. Isoaryl groups also refer to heteroaryl groups. Heteroaryl groups may be heteroaryl groups having 3 to 30 carbon atoms, preferably heteroaryl groups having 3 to 20 carbon atoms, and more preferably heteroaryl groups having 3 to 12 carbon atoms. Suitable heteroaryl groups are dibenzothiophene, dibenzofuran, dibenzoselenophene, furan, thiophene, benzofuran, benzothiophene, benzoselenophene, carbazole, indolocarbazole, pyridoindole, pyrrolopyridine, pyrazole, imidazole, triazole, oxazole, thiazole, oxadiazole, oxatriazole, dioxazole, thiadiazole, pyridine, pyridazine, pyrimidine, pyrazine, triazine, oxazine, oxathiazine, oxadiazine, indole, benzimidazole, indazole, indenoazine, benzoxazole, benzisoxazole, These include benzothiazole, quinoline, isoquinoline, cinnoline, quinazoline, quinoxaline, naphthyridine, phthalazine, pteridine, xanthene, acridine, phenazine, phenothiazine, benzofuranpyridine, frangipyridine, benzothienopyridine, thienobipyridine, benzoselenopyridine, and selenobenzopyridine, and preferably include dibenzothiophene, dibenzofuran, dibenzoselenophene, carbazole, indolocarbazole, imidazole, pyridine, triazine, benzimidazole, 1,2-azaborane, 1,3-azaborane, 1,4-azaborane, borazole, and its aza analogues. The heteroaryl group may also be substituted.

As used herein, an alkoxy group is represented by an -O-alkyl group, an -O-cycloalkyl group, an -O-heteroalkyl group, or an -O-heterocyclic group. Examples and preferred examples of the alkyl group, the cycloalkyl group, the heteroalkyl group, and the heterocyclic group are the same as those described above. The alkoxy group may be an alkoxy group having 1 to 20 carbon atoms, and is preferably an alkoxy group having 1 to 6 carbon atoms. Examples of the alkoxy group include methoxy, ethoxy, propoxy, butoxy, pentyloxy, hexyloxy, cyclopropyloxy, cyclobutyloxy, cyclopentyloxy, cyclohexyloxy, tetrahydrofuranyloxy, tetrahydropyranyloxy, methoxypropyloxy, ethoxyethyloxy, methoxymethyloxy, and ethoxymethyloxy. The alkoxy group may be substituted.

As used herein, an aryloxy group is represented by an -O-aryl group or an -O-heteroaryl group. Examples and preferred examples of the aryl group and the heteroaryl group are the same as those described above. The aryloxy group may be an aryloxy group having 6 to 30 carbon atoms, and is preferably an aryloxy group having 6 to 20 carbon atoms. Examples of the aryloxy group include phenoxy and biphenoxy. The aryloxy group may be substituted.

As used herein, an aralkyl group includes an alkyl group substituted with an aryl group. The aralkyl group may be an aralkyl group having 7 to 30 carbon atoms, preferably an aralkyl group having 7 to 20 carbon atoms, and more preferably an aralkyl group having 7 to 13 carbon atoms. Examples of aralkyl groups include benzyl, 1-phenylethyl, 2-phenylethyl, 1-phenylisopropyl, 2-phenylisopropyl, phenyl-tert-butyl, α-naphthylmethyl, 1-α-naphthylethyl, 2-α-naphthylethyl, 1-α-naphthylisopropyl, 2-α-naphthylisopropyl, β-naphthylmethyl, 1-β-naphthyl-ethyl, 2-β-naphthyl-ethyl, 1-β-naphthylisopropyl, 2-β-naphthylisopropyl, p-methylbenzyl, m-methylbenzyl, o-methylbenzyl, p-chlorobenzyl, m-chlorobenzyl, o ... These include chlorobenzyl, o-chlorobenzyl, p-bromobenzyl, m-bromobenzyl, o-bromobenzyl, p-iodobenzyl, m-iodobenzyl, o-iodobenzyl, p-hydroxybenzyl, m-hydroxybenzyl, o-hydroxybenzyl, p-aminobenzyl, m-aminobenzyl, o-aminobenzyl, p-nitrobenzyl, m-nitrobenzyl, o-nitrobenzyl, p-cyanobenzyl, m-cyanobenzyl, o-cyanobenzyl, 1-hydroxy-2-phenylisopropyl, and 1-chloro-2-phenylisopropyl. Of these, benzyl, p-cyanobenzyl, m-cyanobenzyl, o-cyanobenzyl, 1-phenylethyl, 2-phenylethyl, 1-phenylisopropyl, and 2-phenylisopropyl are preferred. The aralkyl group may also be substituted.

As used herein, an alkylsilyl group includes a silyl group substituted with an alkyl group. The alkylsilyl group may be an alkylsilyl group having 3 to 20 carbon atoms, and is preferably an alkylsilyl group having 3 to 10 carbon atoms. Examples of alkylsilyl groups include trimethylsilyl, triethylsilyl, methyldiethylsilyl, ethyldimethylsilyl, tripropylsilyl, tributylsilyl, triisopropylsilyl, methyldiisopropylsilyl, dimethylisopropylsilyl, tri-tert-butylsilyl, triisobutylsilyl, dimethyl-tert-butylsilyl, and methyldi-tert-butylsilyl. The alkylsilyl group may also be substituted.

As used herein, an arylsilyl group includes a silyl group substituted with at least one aryl group. The arylsilyl group may be an arylsilyl group having 6 to 30 carbon atoms, and is preferably an arylsilyl group having 8 to 20 carbon atoms. Examples of arylsilyl groups include triphenylsilyl, phenyl dibiphenylsilyl, diphenyl biphenylsilyl, phenyl diethylsilyl, diphenyl ethylsilyl, phenyl dimethylsilyl, diphenyl methylsilyl, phenyl diisopropylsilyl, diphenyl isopropylsilyl, diphenyl butylsilyl, diphenyl isobutylsilyl, and diphenyl-tert-butylsilyl. The arylsilyl group may also be substituted.

As used herein, an alkylgermanium group includes a germanium group substituted with an alkyl group. The alkylgermanium group may be an alkylgermanium group having 3 to 20 carbon atoms, and is preferably an alkylgermanium group having 3 to 10 carbon atoms. Examples of alkylgermanium groups include a trimethylgermanium group, a triethylgermanium group, a methyldiethylgermanium group, an ethyldimethylgermanium group, a tripropylgermanium group, a tributylgermanium group, a triisopropylgermanium group, a methyldiisopropylgermanium group, a dimethylisopropylgermanium group, a tri-tert-butylgermanium group, a triisobutylgermanium group, a dimethyl-tert-butylgermanium group, and a methyldi-tert-butylgermanium group. The alkylgermanium group may also be substituted.

As used herein, an arylgermanium group includes a germanium group substituted with at least one aryl or heteroaryl group. The arylgermanium group may be an arylgermanium group having 6 to 30 carbon atoms, and is preferably an arylgermanium group having 8 to 20 carbon atoms. Examples of arylgermanium groups include triphenylgermanium groups, phenyldibiphenylgermanium groups, diphenylbiphenylgermanium groups, phenyldiethylgermanium groups, diphenylethylgermanium groups, phenyldimethylgermanium groups, diphenylmethylgermanium groups, phenyldiisopropylgermanium groups, diphenylisopropylgermanium groups, diphenylbutylgermanium groups, diphenylisobutylgermanium groups, and diphenyl-tert-butylgermanium groups. The arylgermanium group may also be substituted.

The "aza" in azadibenzofuran, azadibenzothiophene, etc., refers to the replacement of one or more C-H groups in the corresponding aromatic fragment with a nitrogen atom. For example, azatriphenylene includes dibenzo[f,h]quinoxaline, dibenzo[f,h]quinoline, and other analogs having two or more nitrogens in the ring system. One of skill in the art can readily envision other nitrogen analogs of the above aza derivatives, and all such analogs are defined as being included within the terminology described herein.

In the present invention, unless otherwise specified, the following groups are included: substituted alkyl groups, substituted cycloalkyl groups, substituted heteroalkyl groups, substituted heterocyclic groups, substituted aralkyl groups, substituted alkoxy groups, substituted aryloxy groups, substituted alkenyl groups, substituted alkynyl groups, substituted aryl groups, substituted heteroaryl groups, substituted alkylsilyl groups, substituted arylsilyl groups, substituted alkylgermanium groups, substituted arylgermanium groups, substituted amino groups, substituted acyl groups, substituted carbonyl groups, substituted carboxyl groups, substituted ester groups, substituted sulfide groups, substituted aryl ... When any of the terms from the group consisting of an alkyl group, a cycloalkyl group, a heteroalkyl group, a heterocyclyl group, an aralkyl group, an alkoxy group, an aryloxy group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, an alkylsilyl group, an arylsilyl group, an alkylgermanium group, an arylgermanium group, an amino group, an acyl group, a carbonyl group, a carboxyl group, an ester group, a sulfinyl group, a sulfonyl group, and a phosphino group is used, the term can refer to any one of an alkyl group, a cycloalkyl group, a heteroalkyl group, a heterocyclyl group, an aralkyl group, an alkoxy group, an aryloxy group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, an alkylsilyl group, an arylsilyl group, an alkylgermanium group, an arylgermanium group, an amino group, an acyl group, a carbonyl group, a carboxyl group, an ester group, a sulfinyl group, a sulfonyl group, and a phosphino group. is selected from the group consisting of deuterium, halogen, an unsubstituted alkyl group having 1 to 20 carbon atoms, an unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, an unsubstituted heteroalkyl group having 1 to 20 carbon atoms, an unsubstituted heterocyclic group having 3 to 20 ring atoms, an unsubstituted aralkyl group having 7 to 30 carbon atoms, an unsubstituted alkoxy group having 1 to 20 carbon atoms, an unsubstituted aryloxy group having 6 to 30 carbon atoms, an unsubstituted alkenyl group having 2 to 20 carbon atoms, an unsubstituted alkynyl group having 2 to 20 carbon atoms, an unsubstituted aryl group having 6 to 30 carbon atoms, an unsubstituted hete group having 3 to 30 carbon atoms, This means that the aryl group can be substituted with one or more selected from an unsubstituted alkylsilyl group having 3 to 20 carbon atoms, an unsubstituted arylsilyl group having 6 to 20 carbon atoms, an unsubstituted alkylgermanium group having 3 to 20 carbon atoms, an unsubstituted arylgermanium group having 6 to 20 carbon atoms, an unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, hydroxyl group, mercapto group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof.

When describing a molecular fragment as being attached to another moiety as a substituent or otherwise, it should be understood that the designation can be defined as being either a fragment (e.g., phenyl, phenylene, naphthyl, dibenzofuranyl) or as being a whole molecule (e.g., benzene, naphthalene, dibenzofuran). As used herein, the designations of the substituents or different modes of attachment of the fragment are recognized as equivalents.

In the compounds referred to herein, hydrogen atoms may be partially or completely replaced with deuterium. Other atoms, such as carbon and nitrogen, may also be replaced with their other stable isotopes. Substitution of other stable isotopes in the compounds may be preferred to improve the efficiency and stability of the device.

In the compounds referred to herein, multiple substitution refers to a range up to the most available substitution, including double substitution. When a substituent in a compound referred to herein is referred to as multiple substitution (including double substitution, triple substitution, quadruple substitution, etc.), it means that the substituent may be present at multiple available substitution positions on the bond structure, and the substituents present at all multiple available substitution positions may be the same structure or different structures.

Unless specifically limited, adjacent substituents in the compounds referred to herein may be bonded to form a ring, adjacent substituents in the compounds may not be bonded to form a ring. In the compounds referred to herein, adjacent substituents may be bonded to form a ring, including not only the situation where adjacent substituents may be bonded to form a ring, but also the situation where adjacent substituents do not bond to form a ring. When adjacent substituents may be bonded to form a ring, the ring formed may be a monocyclic or polycyclic ring, and an alicyclic, heteroalicyclic, aryl, or heteroaryl ring. In such descriptions, adjacent substituents may refer to substituents bonded to the same atom, substituents bonded to carbon atoms directly bonded to each other, or substituents bonded to carbon atoms further apart. Preferably, adjacent substituents refer to substituents bonded to the same carbon atom and substituents bonded to carbon atoms directly bonded to each other.

The statement that adjacent substituents may be bonded to form a ring is also understood to mean that two substituents bonded to the same carbon atom are bonded to each other by a chemical bond to form a ring, and can be exemplified by the following formula:

The statement that adjacent substituents may be bonded to form a ring is also understood to mean that two substituents bonded to carbon atoms that are directly bonded to each other are bonded to each other by a chemical bond to form a ring, which can be exemplified by the following formula:

The statement that adjacent substituents may be bonded to form a ring is also understood to mean that two substituents bonded to carbon atoms further apart are bonded to each other by a chemical bond to form a ring, which can be exemplified by the following formula:

In addition, the statement that adjacent substituents may be bonded to form a ring is also recognized as meaning that when one of the two substituents bonded to carbon atoms directly bonded to each other represents hydrogen, the second substituent is bonded to the position to which the hydrogen atom is bonded to form a ring. An example is shown in the formula below.

According to one embodiment of the present invention, a compound having a structure represented by formula 1 is disclosed.

（Ｘは、Ｏ、ＳまたはＳｅから選ばれ、
Ｘ_１～Ｘ_６は、出現毎に同一または異なってＣＲ_ｘまたはＮから選ばれ、
Ｚ_１～Ｚ_８は、出現毎に同一または異なってＣ、ＣＲ_ｚまたはＮから選ばれ、且つＺ_１～Ｚ_４のうちの１つは、Ｃから選ばれ、Ｌ_２に結合し、
Ａｒは、出現毎に同一または異なって置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、またはこれらの組合せから選ばれ、
Ｌ_１は、出現毎に同一または異なって置換または非置換の炭素原子数６～３０のアリーレン基、置換または非置換の炭素原子数３～１６のヘテロアリーレン基、またはこれらの組合せから選ばれ、
Ｌ_２は、出現毎に同一または異なって単結合、置換または非置換の炭素原子数６～３０のアリーレン基、置換または非置換の炭素原子数３～３０のヘテロアリーレン基、またはこれらの組合せから選ばれ、
Ｒ_ｙは、出現毎に同一または異なって一置換、複数置換または無置換を表し、
Ｒ_ｘおよびＲ_ｚは、出現毎に同一または異なって水素、重水素、ハロゲン、置換または非置換の炭素原子数１～２０のアルキル基、置換または非置換の環炭素原子数３～２０のシクロアルキル基、置換または非置換の炭素原子数１～２０のヘテロアルキル基、置換または非置換の環原子数３～２０のヘテロ環基、置換または非置換の炭素原子数７～３０のアラルキル基、置換または非置換の炭素原子数１～２０のアルコキシ基、置換または非置換の炭素原子数６～３０のアリールオキシ基、置換または非置換の炭素原子数２～２０のアルケニル基、置換または非置換の炭素原子数２～２０のアルキニル基、置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、置換または非置換の炭素原子数３～２０のアルキルシリル基、置換または非置換の炭素原子数６～２０のアリールシリル基、置換または非置換の炭素原子数３～２０のアルキルゲルマニウム基、置換または非置換の炭素原子数６～２０のアリールゲルマニウム基、置換または非置換の炭素原子数０～２０のアミノ基、アシル基、カルボニル基、カルボキシル基、エステル基、シアノ基、イソシアノ基、ヒドロキシル基、スルファニル基、スルフィニル基、スルホニル基、ホスフィノ基、およびこれらの組合せからなる群から選ばれ、
Ｒ_ｙは、出現毎に同一または異なって水素、重水素、ハロゲン、置換または非置換の炭素原子数１～２０のアルキル基、置換または非置換の環炭素原子数３～２０のシクロアルキル基、置換または非置換の炭素原子数１～２０のヘテロアルキル基、置換または非置換の環原子数３～２０のヘテロ環基、置換または非置換の炭素原子数７～３０のアラルキル基、置換または非置換の炭素原子数１～２０のアルコキシ基、置換または非置換の炭素原子数６～３０のアリールオキシ基、置換または非置換の炭素原子数２～２０のアルケニル基、置換または非置換の炭素原子数２～２０のアルキニル基、置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、置換または非置換の炭素原子数３～２０のアルキルシリル基、置換または非置換の炭素原子数６～２０のアリールシリル基、置換または非置換の炭素原子数３～２０のアルキルゲルマニウム基、置換または非置換の炭素原子数６～２０のアリールゲルマニウム基、アシル基、カルボニル基、カルボキシル基、エステル基、シアノ基、イソシアノ基、ヒドロキシル基、スルファニル基、スルフィニル基、スルホニル基、ホスフィノ基、およびこれらの組合せからなる群から選ばれ、
隣り合う置換基Ｒ_ｘは、結合して環を形成していてもよく、
隣り合う置換基Ｒ_ｙは、結合して環を形成していてもよく、
隣り合う置換基Ｒ_ｚは、結合して環を形成していてもよい。）

X is selected from O, S or Se;
X ₁ to X ₆ are each identically or differently selected from CR _x or N at each occurrence;
Z ₁ to Z ₈ are, at each occurrence, the same or different, selected from C, _CRz or N, and one of Z ₁ to Z ₄ is selected from C and is bonded to L ₂ ;
Ar, at each occurrence, is the same or different and is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;
L ₁ is, at each occurrence, the same or different, selected from a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 16 carbon atoms, or a combination thereof;
_L2 , each occurrence, is the same or different and is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof;
R _y is the same or different at each occurrence and represents mono-, poly- or no substitution;
R _x and R _z each occur the same or different and each represent a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted carbon a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, hydroxyl group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof,
R _y each occurrence may be the same or different and is selected from hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl ... a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxyl group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
Adjacent substituents R _x may be bonded to form a ring,
Adjacent substituents R _y may be bonded to form a ring,
Adjacent substituents R _z may be bonded to form a ring.

In the present specification, "adjacent substituents R _x may be bonded to form a ring" means that adjacent substituent groups, for example, any one or more of any two substituents R _x may be bonded to form a ring. Obviously, these substituents do not have to be bonded to form a ring.

In this specification, "adjacent substituents R _y may be bonded to form a ring" means that adjacent substituent groups, for example, any one or more of any two substituents R _y may be bonded to form a ring. Obviously, these substituents do not have to be bonded to form a ring.

In the present specification, "adjacent substituents _Rz may be bonded to form a ring" means that adjacent substituent groups, for example, any one or more of any two substituents _Rz, may be bonded to form a ring. Obviously, these substituents do not have to be bonded to form a ring.

According to one embodiment of the present invention, X is selected from O or S.

According to one embodiment of the present invention, X is O.

According to one embodiment of the present invention, X ₁ to X ₆ , at each occurrence, are identically or differently selected from CR _x .

According to one embodiment of the present invention, X ₁ to X ₆ are selected from CR _x or N, identically or differently for each occurrence, and at least one of X ₁ to X ₆ is selected from N, for example, one or two of X ₁ to X ₆ are selected from N.

According to one embodiment of the present invention, Z ₁ to Z ₈ , at each occurrence, are identically or differently selected from C or CR _z , and one of Z ₁ to Z ₄ is selected from C and is bonded to L ₂ .

According to one embodiment of the present invention, Z ₁ to Z ₈ are identical or different at each occurrence and selected from C, CR _z or N, and at least one of Z ₁ to Z ₈ is selected from N, for example, one or two of Z ₁ to Z ₈ are selected from N.

According to one embodiment of the present invention, L ₁ at each occurrence is the same or different and is selected from substituted or unsubstituted arylene groups having 6 to 20 carbon atoms.

According to one embodiment of the present invention, L ₁ at each occurrence is the same or different and is selected from substituted or unsubstituted arylene groups having 6 to 12 carbon atoms.

According to one embodiment of the present invention, L ₁ , at each occurrence, is the same or different and is selected from a substituted or unsubstituted phenylene group, a substituted or unsubstituted biphenylene group, a substituted or unsubstituted naphthylene group, or a combination thereof.

According to one embodiment of the present invention, _L2 , at each occurrence, is the same or different and is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof.

According to one embodiment of the present invention, _L2 , at each occurrence, is the same or different and is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 12 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 12 carbon atoms, or a combination thereof.

According to one embodiment of the present invention, _L2 , at each occurrence, is the same or different and is selected from a single bond, a substituted or unsubstituted phenylene group, a substituted or unsubstituted biphenylene group, a substituted or unsubstituted naphthylene group, a substituted or unsubstituted pyridylene group, or a combination thereof.

According to one embodiment of the present invention, _L2 , identically or differently at each occurrence, is selected from a single bond or a phenylene group.

According to one embodiment of the present invention, the compound has a structure represented by formula 1-1.

（Ａｒは、出現毎に同一または異なって置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、またはこれらの組合せから選ばれ、
Ｌ_１は、出現毎に同一または異なって置換または非置換の炭素原子数６～３０のアリーレン基から選ばれ、
Ｌ_２は、出現毎に同一または異なって単結合、または置換または非置換の炭素原子数６～３０のアリーレン基から選ばれ、
Ｒ_ｘ、Ｒ_ｙおよびＲ_ｚは、出現毎に同一または異なって水素、重水素、ハロゲン、置換または非置換の炭素原子数１～２０のアルキル基、置換または非置換の環炭素原子数３～２０のシクロアルキル基、置換または非置換の炭素原子数１～２０のヘテロアルキル基、置換または非置換の環原子数３～２０のヘテロ環基、置換または非置換の炭素原子数７～３０のアラルキル基、置換または非置換の炭素原子数１～２０のアルコキシ基、置換または非置換の炭素原子数６～３０のアリールオキシ基、置換または非置換の炭素原子数２～２０のアルケニル基、置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、置換または非置換の炭素原子数３～２０のアルキルシリル基、置換または非置換の炭素原子数６～２０のアリールシリル基、置換または非置換の炭素原子数３～２０のアルキルゲルマニウム基、置換または非置換の炭素原子数６～２０のアリールゲルマニウム基、およびこれらの組合せからなる群から選ばれ、
隣り合う置換基Ｒ_ｘは、結合して環を形成していてもよく、
隣り合う置換基Ｒ_ｙは、結合して環を形成していてもよく、
隣り合う置換基Ｒ_ｚは、結合して環を形成していてもよい。）

Ar is, at each occurrence, the same or different, selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;
L ₁ , which may be the same or different at each occurrence, is selected from substituted or unsubstituted arylene groups having 6 to 30 carbon atoms;
_L2 , which may be the same or different at each occurrence, is selected from a single bond or a substituted or unsubstituted arylene group having 6 to 30 carbon atoms;
R _x , R _y and R _z each occur the same or different and each represent hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 3 ... or selected from the group consisting of unsubstituted alkenyl groups having 2 to 20 carbon atoms, substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6 to 20 carbon atoms, and combinations thereof;
Adjacent substituents R _x may be bonded to form a ring,
Adjacent substituents R _y may be bonded to form a ring,
Adjacent substituents R _z may be bonded to form a ring.

According to one embodiment of the present invention, R _x , R _y and R _z , at each occurrence, are the same or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, substituted or unsubstituted alkenyl groups having 2 to 20 carbon atoms, substituted or unsubstituted aryl groups having 6 to 20 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 20 carbon atoms, and combinations thereof.

According to one embodiment of the present invention, _Rx , _Ry and _Rz , at each occurrence, are the same or different and are selected from the group consisting of hydrogen, deuterium, a substituted or unsubstituted phenyl group, a substituted or unsubstituted pyridine group, a substituted or unsubstituted naphthalene group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted triphenylene group, a substituted or unsubstituted fluorene group, a substituted or unsubstituted carbazole group, a substituted or unsubstituted dibenzofuran group, a substituted or unsubstituted dibenzothiophene group, and combinations thereof.

According to one embodiment of the present invention, R _x and R _z , at each occurrence, are the same or different and are selected from the group consisting of hydrogen, deuterium, a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthalene group, a substituted or unsubstituted biphenyl group, and combinations thereof.

According to one embodiment of the present invention, each occurrence of Ar is identical or different and is selected from a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 20 carbon atoms, or a combination thereof.

According to one embodiment of the present invention, Ar, at each occurrence, is selected from the same or different, a substituted or unsubstituted aryl group having 6 to 12 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 12 carbon atoms, or a combination thereof.

According to one embodiment of the present invention, Ar is selected, at each occurrence, identically or differently, from the group consisting of a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthalene group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted triphenylene group, a substituted or unsubstituted fluorene group, a substituted or unsubstituted carbazole group, a substituted or unsubstituted dibenzofuran group, a substituted or unsubstituted dibenzothiophene group, and combinations thereof.

According to one embodiment of the present invention, the compound is selected from the group consisting of Compound A-1 to Compound A-262. Specific structures of Compound A-1 to Compound A-262 are shown in claim 8.

According to one embodiment of the present invention, the hydrogen atoms in compounds A-1 to A-262 may be partially or completely deuterated.

According to one embodiment of the present invention, there is disclosed an organic electroluminescence element including an anode, a cathode, and an organic layer provided between the anode and the cathode, in which at least one of the organic layers includes a compound described in any one of the above-mentioned embodiments.

According to one embodiment of the present invention, the organic layer containing the compound is an emitting layer, the compound is a host compound, and the emitting layer contains at least a first metal complex.

環Ｃ_１および環Ｃ_２は、出現毎に同一または異なって環原子数５～３０の芳香族環、環原子数５～３０のヘテロ芳香族環、またはこれらの組合せから選ばれ、
Ｑ_１およびＱ_２は、出現毎に同一または異なってＣまたはＮから選ばれ、
Ｒ_１１およびＲ_１２は、出現毎に同一または異なって一置換、複数置換または無置換を表し、
Ｒ_１１およびＲ_１２は、出現毎に同一または異なって水素、重水素、ハロゲン、置換または非置換の炭素原子数１～２０のアルキル基、置換または非置換の環炭素原子数３～２０のシクロアルキル基、置換または非置換の炭素原子数１～２０のヘテロアルキル基、置換または非置換の環原子数３～２０のヘテロ環基、置換または非置換の炭素原子数７～３０のアラルキル基、置換または非置換の炭素原子数１～２０のアルコキシ基、置換または非置換の炭素原子数６～３０のアリールオキシ基、置換または非置換の炭素原子数２～２０のアルケニル基、置換または非置換の炭素原子数２～２０のアルキニル基、置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、置換または非置換の炭素原子数３～２０のアルキルシリル基、置換または非置換の炭素原子数６～２０のアリールシリル基、置換または非置換の炭素原子数３～２０のアルキルゲルマニウム基、置換または非置換の炭素原子数６～２０のアリールゲルマニウム基、置換または非置換の炭素原子数０～２０のアミノ基、アシル基、カルボニル基、カルボキシル基、エステル基、シアノ基、イソシアノ基、ヒドロキシル基、スルファニル基、スルフィニル基、スルホニル基、ホスフィノ基、およびこれらの組合せからなる群から選ばれ、
隣り合う置換基Ｒ_１１、Ｒ_１２は、結合して環を形成していてもよく、
配位子Ｌ_ｂおよびＬ_ｃは、出現毎に同一または異なってモノアニオン性２座配位子から選ばれる。） According to one embodiment of the present invention, the first metal complex has a general formula of M(L _a ) _m (L _b ) _n (L _c ) _q .
(Metal M is selected from metals having a relative atomic mass greater than 40;
Ligands L _a , L _b and L _c are first, second and third ligands coordinated with said metal M, respectively, and the ligands L _a , L _b and L _c may be the same or different;
The ligands L _a , L _b and L _c may be bonded to form a multidentate ligand, for example, any two of L _a , L _b and L _c may be bonded to form a tetradentate ligand, or for example, L _a , L _b and L _c may be bonded to each other to form a hexadentate ligand, or further for example, none of L _a , L _b and L _c are bonded to form a multidentate ligand,
m is 1, 2 or 3, n is 0, 1 or 2, q is 0, 1 or 2, the sum of m, n and q is equal to the participation state of the metal M, when m is 2 or more, a plurality of L _a may be the same or different, when n is 2, two L _b may be the same or different, when q is 2, two L _c may be the same or different,
The ligand L _a has a structure represented by formula 2:

Ring _C1 and ring _C2 each occur the same or different and are selected from an aromatic ring having 5 to 30 ring atoms, a heteroaromatic ring having 5 to 30 ring atoms, or a combination thereof;
_Q1 and _Q2 are the same or different at each occurrence and are selected from C or N;
R ₁₁ and R ₁₂ are the same or different and each occurrence represents mono-, poly- or unsubstituted;
R ₁₁ and R ₁₂ each occur the same or different and each represent a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted carbon atom, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, hydroxyl group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof,
Adjacent substituents R ₁₁ and R ₁₂ may be bonded to form a ring;
The ligands _Lb and _Lc at each occurrence are the same or different and are selected from monoanionic bidentate ligands.

からなる群から選ばれる。
（Ｒ_ａおよびＲ_ｂは、出現毎に同一または異なって一置換、複数置換、または無置換を表し、
Ｘ_ｂは、出現毎に同一または異なってＯ、Ｓ、Ｓｅ、ＮＲ_Ｎ１およびＣＲ_Ｃ１Ｒ_Ｃ２からなる群から選ばれ、
Ｘ_ｃおよびＸ_ｄは、出現毎に同一または異なってＯ、Ｓ、ＳｅおよびＮＲ_Ｎ２からなる群から選ばれ、
Ｒ_ａ、Ｒ_ｂ、Ｒ_ｃ、Ｒ_Ｎ１、Ｒ_Ｎ２、Ｒ_Ｃ１およびＲ_Ｃ２は、出現毎に同一または異なって水素、重水素、ハロゲン、置換または非置換の炭素原子数１～２０のアルキル基、置換または非置換の環炭素原子数３～２０のシクロアルキル基、置換または非置換の炭素原子数１～２０のヘテロアルキル基、置換または非置換の環原子数３～２０のヘテロ環基、置換または非置換の炭素原子数７～３０のアラルキル基、置換または非置換の炭素原子数１～２０のアルコキシ基、置換または非置換の炭素原子数６～３０のアリールオキシ基、置換または非置換の炭素原子数２～２０のアルケニル基、置換または非置換の炭素原子数２～２０のアルキニル基、置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、置換または非置換の炭素原子数３～２０のアルキルシリル基、置換または非置換の炭素原子数６～２０のアリールシリル基、置換または非置換の炭素原子数３～２０のアルキルゲルマニウム基、置換または非置換の炭素原子数６～２０のアリールゲルマニウム基、置換または非置換の炭素原子数０～２０のアミノ基、アシル基、カルボニル基、カルボキシル基、エステル基、シアノ基、イソシアノ基、ヒドロキシル基、スルファニル基、スルフィニル基、スルホニル基、ホスフィノ基、およびこれらの組合せからなる群から選ばれ、
隣り合う置換基Ｒ_ａ、Ｒ_ｂ、Ｒ_ｃ、Ｒ_Ｎ１、Ｒ_Ｎ２、Ｒ_Ｃ１およびＲ_Ｃ２は、結合して環を形成していてもよい。） According to one embodiment of the invention, the ligands L _b and L _c may be identical or different at each occurrence.

is selected from the group consisting of:
R _a and R _b are the same or different and each occurrence represents a mono-, poly- or no substitution;
X _b is, at each occurrence, the same or different, selected from the group consisting of O, S, Se, NR _N1 and CR _C1 R _C2 ;
_Xc and _Xd , each occurrence, are the same or different and are selected from the group consisting of O, S, Se and NR _N2 ;
R _a , R _b , R _c , R _N1 , R _N2 , R _C1 and R _C2 each represent, the same or different, hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted carbon atom, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, hydroxyl group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof,
Adjacent substituents R _a , R _b , R _c , R _N1 , R _N2 , R _C1 and R _C2 may be bonded to form a ring.

In this embodiment, "adjacent substituents R _a , R _b , R _c , R _N1 , R _N2 , R _C1 and R _C2 may be bonded to form a ring" means that adjacent substituent groups, such as two substituents R _a , two substituents R _b , substituents R _a and R _b , substituents R _a and R _c , substituents R _b and R _c , substituents R _a and R _N1 , substituents R _b and R _N1 , substituents R _a and R _C1 , substituents R _a and R _C2 , substituents R _b and R _C1 , substituents R _b and R _C2 , and R _C1 and R _C2 , substituents R _a and R _N2 , and substituents R _b and R _N2 may be bonded to form a ring. Obviously, none of these substituents may be bonded to form a ring.

According to one embodiment of the present invention, the first metal complex has a general structure of Ir(L _a ) _m (L _b ) _3-m and has a structure represented by Formula 5:

（ｍは、０、１、２または３であり、ｍが２または３である場合、複数のＬ_ａは、同一または異なり、ｍが０または１である場合、複数のＬ_ｂは、同一または異なり、
Ｔ_１～Ｔ_６は、出現毎に同一または異なってＣＲ_ＴまたはＮから選ばれ、
Ｒ_ａ、Ｒ_ｂおよびＲ_ｄは、出現毎に同一または異なって一置換、複数置換、または無置換を表し、
Ｒ_ａ、Ｒ_ｂ、Ｒ_ｄおよびＲ_Ｔは、出現毎に同一または異なって水素、重水素、ハロゲン、置換または非置換の炭素原子数１～２０のアルキル基、置換または非置換の環炭素原子数３～２０のシクロアルキル基、置換または非置換の炭素原子数１～２０のヘテロアルキル基、置換または非置換の環原子数３～２０のヘテロ環基、置換または非置換の炭素原子数７～３０のアラルキル基、置換または非置換の炭素原子数１～２０のアルコキシ基、置換または非置換の炭素原子数６～３０のアルキルシリル基、置換または非置換の炭素原子数２～２０のアルケニル基、置換または非置換の炭素原子数２～２０のアルキニル基、置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、置換または非置換の炭素原子数３～２０のアルキルシリル基、置換または非置換の炭素原子数６～２０のアリールシリル基、置換または非置換の炭素原子数３～２０のアルキルゲルマニウム基、置換または非置換の炭素原子数６～２０のアリールゲルマニウム基、置換または非置換の炭素原子数０～２０のアミノ基、アシル基、カルボニル基、カルボキシル基、エステル基、シアノ基、イソシアノ基、スルファニル基、ヒドロキシル基、スルフィニル基、スルホニル基、ホスフィノ基、およびこれらの組合せからなる群から選ばれ、
隣り合う置換基Ｒ_ａ、Ｒ_ｂは、結合して環を形成していてもよく、
隣り合う置換基Ｒ_ｄ、Ｒ_Ｔは、結合して環を形成していてもよい。）

(m is 0, 1, 2 or 3; when m is 2 or 3, a plurality of L _a's are the same or different; when m is 0 or 1, a plurality of L _b's are the same or different;
T ₁ to T ₆ are each identically or differently selected from CR _T or N at each occurrence;
R _a , R _b and R _d are the same or different and each occurrence represents mono-, poly- or no substitution;
R _a , R _b , R _d and R _T each occur the same or different and each represent hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted alkylsilyl group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted carbon a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, sulfanyl group, hydroxyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof,
adjacent substituents R _a and R _b may be bonded to form a ring;
Adjacent substituents R _d and R _T may be bonded to form a ring.

In this embodiment, "adjacent substituents R _a and R _b may be bonded to form a ring" means that adjacent substituent groups, for example, any one or more of two adjacent substituents R _a , two adjacent substituents R _b , and adjacent substituents R _a and R _b may be bonded to form a ring. Obviously, none of these substituents may be bonded to form a ring.

In this embodiment, "adjacent substituents R _d and R _T may be bonded to form a ring" means that adjacent substituent groups, for example, any one or more of two adjacent substituents R _T or two adjacent substituents R _d may be bonded to form a ring. Obviously, none of these substituents may be bonded to form a ring.

According to one embodiment of the present invention, at least one of T ₁ to T ₆ is selected from CR _T , and said _RT is selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, or a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms.

According to an embodiment of the present invention, at least one of T ₁ to T ₆ is selected from CR _T , and said _RT is selected from fluorine or cyano group.

According to one embodiment of the present invention, at least two of T ₁ to T ₆ are selected from CR _T , and one of R _T is selected from fluorine or cyano group, and the other R _T is selected from substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, substituted or unsubstituted aryl group having 6 to 30 carbon atoms, or substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms.

According to one embodiment of the present invention, T ₁ to T ₆ are selected from CR _T or N, either the same or differently for each occurrence, and at least one of T ₁ to T ₆ is selected from N, for example, one or two of T ₁ to T ₆ are selected from N.

According to one embodiment of the present invention, the first metal complex is selected from the group consisting of GD1 to GD76, but is not limited thereto. Specific structures of GD1 to GD76 are as follows:

According to one embodiment of the present invention, the organic layer containing the compound is an electron transport layer, and the compound is an electron transport compound.

According to one embodiment of the present invention, in the organic electroluminescence device, the light-emitting layer further includes a second host compound, and the second host compound includes at least one chemical group selected from the group consisting of benzene, pyridine, pyrimidine, triazine, carbazole, azacarbazole, indolocarbazole, dibenzothiophene, azadibenzothiophene, dibenzofuran, azadibenzofuran, dibenzoselenophene, triphenylene, azatriphenylene, fluorene, silicon fluorene, naphthalene, quinoline, isoquinoline, quinazoline, quinoxaline, phenanthrene, azaphenanthrene, and combinations thereof.

According to one embodiment of the present invention, in the organic electroluminescent device, the light-emitting layer further includes a second host compound, and the second host compound includes at least one chemical group selected from the group consisting of benzene, carbazole, indolocarbazole, fluorene, silicon fluorene, and combinations thereof.

According to one embodiment of the present invention, in the organic electroluminescence element, the second host compound has a structure represented by formula 3.

（Ｌ_Ｔは、出現毎に同一または異なって単結合、置換または非置換の炭素原子数１～２０のアルキレン基、置換または非置換の炭素原子数３～２０のシクロアルキレン基、置換または非置換の炭素原子数６～２０のアリーレン基、置換または非置換の炭素原子数３～２０のヘテロアリーレン基、またはこれらの組合せから選ばれ、
Ｔは、出現毎に同一または異なってＣ、ＣＲ_ｔまたはＮから選ばれ、
Ｒ_ｔは、出現毎に同一または異なって水素、重水素、ハロゲン、置換または非置換の炭素原子数１～２０のアルキル基、置換または非置換の環炭素原子数３～２０のシクロアルキル基、置換または非置換の炭素原子数１～２０のヘテロアルキル基、置換または非置換の環原子数３～２０のヘテロ環基、置換または非置換の炭素原子数７～３０のアラルキル基、置換または非置換の炭素原子数１～２０のアルコキシ基、置換または非置換の炭素原子数６～３０のアルキルシリル基、置換または非置換の炭素原子数２～２０のアルケニル基、置換または非置換の炭素原子数２～２０のアルキニル基、置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、置換または非置換の炭素原子数３～２０のアルキルシリル基、置換または非置換の炭素原子数６～２０のアリールシリル基、置換または非置換の炭素原子数３～２０のアルキルゲルマニウム基、置換または非置換の炭素原子数６～２０のアリールゲルマニウム基、置換または非置換の炭素原子数０～２０のアミノ基、アシル基、カルボニル基、カルボキシル基、エステル基、シアノ基、イソシアノ基、ヒドロキシル基、スルファニル基、スルフィニル基、スルホニル基、ホスフィノ基、およびこれらの組合せからなる群から選ばれ、
Ａｒ_１は、出現毎に同一または異なって置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、またはこれらの組合せから選ばれ、
隣り合う置換基Ｒ_ｔは、結合して環を形成していてもよい。）

L _T is, at each occurrence, the same or different, selected from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof;
T is, identically or differently, selected from C, _CRt, or N at each occurrence;
R _t is the same or different at each occurrence and is hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted alkylsilyl group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted carbon a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, hydroxyl group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof,
Ar ₁ , each occurrence being the same or different, is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;
Adjacent substituents R _t may be bonded to form a ring.

In this specification, "adjacent substituents R _t may be bonded to form a ring" means that adjacent substituent groups, for example, any one or more of any two substituents R _t, may be bonded to form a ring. Obviously, these substituents do not have to be bonded to form a ring.

According to one embodiment of the present invention, in the organic electroluminescence element, the second host compound has a structure represented by formula 4.

（Ｇは、出現毎に同一または異なってＣ（Ｒ_ｇ）_２、ＮＲ_ｇ、ＯまたはＳから選ばれ、
Ｔは、出現毎に同一または異なってＣ、ＣＲ_ｔまたはＮから選ばれ、
Ｌ_Ｔは、出現毎に同一または異なって単結合、置換または非置換の炭素原子数１～２０のアルキレン基、置換または非置換の炭素原子数３～２０のシクロアルキレン基、置換または非置換の炭素原子数６～２０のアリーレン基、置換または非置換の炭素原子数３～２０のヘテロアリーレン基、またはこれらの組合せから選ばれ、
Ｒ_ｔ、Ｒ_ｇは、出現毎に同一または異なって水素、重水素、ハロゲン、置換または非置換の炭素原子数１～２０のアルキル基、置換または非置換の環炭素原子数３～２０のシクロアルキル基、置換または非置換の炭素原子数１～２０のヘテロアルキル基、置換または非置換の環原子数３～２０のヘテロ環基、置換または非置換の炭素原子数７～３０のアラルキル基、置換または非置換の炭素原子数１～２０のアルコキシ基、置換または非置換の炭素原子数６～３０のアルキルシリル基、置換または非置換の炭素原子数２～２０のアルケニル基、置換または非置換の炭素原子数２～２０のアルキニル基、置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、置換または非置換の炭素原子数３～２０のアルキルシリル基、置換または非置換の炭素原子数６～２０のアリールシリル基、置換または非置換の炭素原子数３～２０のアルキルゲルマニウム基、置換または非置換の炭素原子数６～２０のアリールゲルマニウム基、置換または非置換の炭素原子数０～２０のアミノ基、アシル基、カルボニル基、カルボキシル基、エステル基、シアノ基、イソシアノ基、ヒドロキシル基、スルファニル基、スルフィニル基、スルホニル基、ホスフィノ基、およびこれらの組合せからなる群から選ばれ、
Ａｒ_１は、出現毎に同一または異なって置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、またはこれらの組合せから選ばれ、
隣り合う置換基Ｒ_ｔ、Ｒ_ｇは、結合して環を形成していてもよい。）

G is, at each occurrence, the same or different, selected from C(R _g ) ₂ , NR _g , O or S;
T is, identically or differently, selected from C, _CRt, or N at each occurrence;
L _T is, at each occurrence, the same or different, selected from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof;
R _t and R _g each occur the same or different and each represent a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted alkylsilyl group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted carbon atom a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, hydroxyl group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof,
Ar ₁ , each occurrence being the same or different, is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;
Adjacent substituents R _t and R _g may be bonded to form a ring.

In this specification, "adjacent substituents R _t and R _g may be bonded to form a ring" means that any one or more of two adjacent substituents R _t , two adjacent substituents R _g , or adjacent substituents R _t and R _g may be bonded to form a ring. Obviously, none of these substituents may be bonded to form a ring.

According to one embodiment of the present invention, in formula 3 and formula 4, T is selected from C and _CRt, which may be the same or different at each occurrence.

According to one embodiment of the present invention, in formula 3, T is selected from C, _CRt or N, each occurrence being the same or different, and at least one of them is selected from N, for example, one T or two T are selected from N.

According to one embodiment of the present invention, in formula 4, T is selected from C, _CRt or N, each occurrence being the same or different, and at least one of them is selected from N, for example, one T or two T are selected from N.

According to one embodiment of the present invention, in the organic electroluminescence device, the second host compound has a structure represented by one of formulas 3-a to 3-j.

（Ｌ_Ｔは、出現毎に同一または異なって単結合、置換または非置換の炭素原子数１～２０のアルキレン基、置換または非置換の炭素原子数３～２０のシクロアルキレン基、置換または非置換の炭素原子数６～２０のアリーレン基、置換または非置換の炭素原子数３～２０のヘテロアリーレン基、またはこれらの組合せから選ばれ、
Ｔは、出現毎に同一または異なってＣＲ_ｔまたはＮから選ばれ、
Ｒ_ｔは、出現毎に同一または異なって水素、重水素、ハロゲン、置換または非置換の炭素原子数１～２０のアルキル基、置換または非置換の環炭素原子数３～２０のシクロアルキル基、置換または非置換の炭素原子数１～２０のヘテロアルキル基、置換または非置換の環原子数３～２０のヘテロ環基、置換または非置換の炭素原子数７～３０のアラルキル基、置換または非置換の炭素原子数１～２０のアルコキシ基、置換または非置換の炭素原子数６～３０のアルキルシリル基、置換または非置換の炭素原子数２～２０のアルケニル基、置換または非置換の炭素原子数２～２０のアルキニル基、置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、置換または非置換の炭素原子数３～２０のアルキルシリル基、置換または非置換の炭素原子数６～２０のアリールシリル基、置換または非置換の炭素原子数３～２０のアルキルゲルマニウム基、置換または非置換の炭素原子数６～２０のアリールゲルマニウム基、置換または非置換の炭素原子数０～２０のアミノ基、アシル基、カルボニル基、カルボキシル基、エステル基、シアノ基、イソシアノ基、ヒドロキシル基、スルファニル基、スルフィニル基、スルホニル基、ホスフィノ基、およびこれらの組合せからなる群から選ばれ、
Ａｒ_１は、出現毎に同一または異なって置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、またはこれらの組合せから選ばれ、
隣り合う置換基Ｒ_ｔは、結合して環を形成していてもよい。）

L _T is, at each occurrence, the same or different, selected from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof;
T is selected from CR _t or N, identically or differently at each occurrence;
R _t is the same or different at each occurrence and is hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted alkylsilyl group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted carbon a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, hydroxyl group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof,
Ar ₁ , each occurrence being the same or different, is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;
Adjacent substituents R _t may be bonded to form a ring.

According to one embodiment of the present invention, in formulas 3-a to 3-j, T is selected from CR _t or N, which may be the same or different for each occurrence, and at least one of them is selected from N, for example, one T or two T are selected from N.

According to one embodiment of the present invention, in the organic electroluminescence device, the second host compound has a structure represented by one of formulas 4-a to 4-f.

（Ｇは、出現毎に同一または異なってＣ（Ｒ_ｇ）_２、ＮＲ_ｇ、ＯまたはＳから選ばれ、
Ｔは、出現毎に同一または異なってＣＲ_ｔまたはＮから選ばれ、
Ｌ_Ｔは、出現毎に同一または異なって単結合、置換または非置換の炭素原子数１～２０のアルキレン基、置換または非置換の炭素原子数３～２０のシクロアルキレン基、置換または非置換の炭素原子数６～２０のアリーレン基、置換または非置換の炭素原子数３～２０のヘテロアリーレン基、またはこれらの組合せから選ばれ、
Ｒ_ｔ、Ｒ_ｇは、出現毎に同一または異なって水素、重水素、ハロゲン、置換または非置換の炭素原子数１～２０のアルキル基、置換または非置換の環炭素原子数３～２０のシクロアルキル基、置換または非置換の炭素原子数１～２０のヘテロアルキル基、置換または非置換の環原子数３～２０のヘテロ環基、置換または非置換の炭素原子数７～３０のアラルキル基、置換または非置換の炭素原子数１～２０のアルコキシ基、置換または非置換の炭素原子数６～３０のアルキルシリル基、置換または非置換の炭素原子数２～２０のアルケニル基、置換または非置換の炭素原子数２～２０のアルキニル基、置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、置換または非置換の炭素原子数３～２０のアルキルシリル基、置換または非置換の炭素原子数６～２０のアリールシリル基、置換または非置換の炭素原子数３～２０のアルキルゲルマニウム基、置換または非置換の炭素原子数６～２０のアリールゲルマニウム基、置換または非置換の炭素原子数０～２０のアミノ基、アシル基、カルボニル基、カルボキシル基、エステル基、シアノ基、イソシアノ基、ヒドロキシル基、スルファニル基、スルフィニル基、スルホニル基、ホスフィノ基、およびこれらの組合せからなる群から選ばれ、
Ａｒ_１は、出現毎に同一または異なって置換または非置換の炭素原子数６～３０のアリール基、置換または非置換の炭素原子数３～３０のヘテロアリール基、またはこれらの組合せから選ばれ、
隣り合う置換基Ｒ_ｔ、Ｒ_ｇは、結合して環を形成していてもよい。）

G is, at each occurrence, the same or different, selected from C(R _g ) ₂ , NR _g , O or S;
T is selected from CR _t or N, identically or differently at each occurrence;
L _T is, at each occurrence, the same or different, selected from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof;
R _t and R _g each occur the same or different and each represent a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted alkylsilyl group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted carbon atom a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, hydroxyl group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof,
Ar ₁ , each occurrence being the same or different, is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;
Adjacent substituents R _t and R _g may be bonded to form a ring.

According to one embodiment of the present invention, in formulae 3-a to 3-j and 4-a to 4-f, T is selected from _CRt , which may be the same or different at each occurrence.

According to one embodiment of the present invention, in formulas 4-a to 4-f, T is selected from CR _t or N, which may be the same or different for each occurrence, and at least one of them is selected from N, for example, one T or two T are selected from N.

According to one embodiment of the present invention, of all T, at least one is selected from N, e.g., one or two T are N.

According to one embodiment of the present invention, the organic electroluminescent element emits green light.

According to one embodiment of the present invention, the organic electroluminescent element emits white light.

According to one embodiment of the present invention, the first metal complex is doped into the compound and the second host compound, and the first metal complex is 1% to 30% by weight of the total light-emitting layer.

According to one embodiment of the present invention, the first metal complex is doped into the compound and the second host compound, and the first metal complex is 3% to 13% by weight of the total light-emitting layer.

According to one embodiment of the present invention, a compound composition is disclosed that includes a compound described in any one of the above embodiments.

According to one embodiment of the present invention, an electronic device is disclosed that includes an organic electroluminescent element described in any one of the above embodiments.

Combination with other materials

The materials of the particular layers used in the organic light-emitting devices described in this invention can be used in combination with various other materials present in the device. These combinations of materials are described in detail in U.S. Patent Application US2016/0359122A1, paragraphs 0132-0161, the contents of which are incorporated herein by reference in their entirety. The materials described or referenced are non-limiting examples of materials that can be used in combination with the compounds disclosed herein, and one of ordinary skill in the art can readily consult the literature to identify other materials that can be used in combination.

It is stated herein that the materials of specific layers used in the organic light emitting device can be used in combination with a variety of other materials present in the device. Illustratively, the light emitting dopants disclosed herein can be used in combination with a variety of hosts, transport layers, blocking layers, injection layers, electrodes and other possible layers. These combinations of materials are described in detail in patent application US2015/0349273A1, paragraphs 0080-0101, the contents of which are incorporated herein by reference in their entirety. The materials described or referenced are non-limiting examples of materials that can be used in combination with the compounds disclosed herein, and those skilled in the art can readily refer to the literature to identify other materials that can be used in combination.

In the examples of material synthesis, all reactions are carried out under nitrogen protection unless otherwise stated. All reaction solvents are anhydrous and used as obtained from commercial sources. The synthesized products were subjected to structural confirmation and property testing using one or more instruments (including but not limited to Bruker nuclear magnetic resonance, Shimadzu liquid chromatography, liquid chromatography/mass spectrometer, gas chromatography/mass spectrometer, differential scanning calorimeter, Shanghai Liangguang Technology fluorescence spectrophotometer, Wuhan Science & Technology electrochemical work station, Anhui Beike sublimation equipment, etc.) in a manner familiar to those skilled in the art. In the examples of devices, the device properties were also tested using instruments (including but not limited to Angstrom Engineering deposition machine, Suzhou Fusida optical test system, service life test system, Beijing Liangtuo ellipsometer, etc.) in a manner familiar to those skilled in the art. Those skilled in the art are familiar with the relevant content, such as the use of the above-mentioned equipment, testing methods, etc., and can reliably and unaffectedly obtain the specific data of the sample, so the above-mentioned relevant content will not be repeated in this specification.

Example of material synthesis:

The method for preparing the compound according to the present invention is not limited. Taking the following compound as a typical but non-limiting example, its synthetic route and preparation method are as follows:

Synthesis Example 1: Synthesis of Compound A-1

Step 1: Synthesis of intermediate C

In a round bottom three neck flask, A (11.0 g, 29.7 mmol), B (12.6 g, _44.6 mmol), Pd( _PPh3 ) ₄ (0.69 g, 0.59 mmol), _K2CO3 (8.21 g, 59.4 mmol) were added in toluene (80 mL), EtOH (20 mL), _H2O (20 mL). Under _N2 protection, the mixture was heated to reflux overnight. When the TLC plate showed the reaction was complete, the heating was stopped and the mixture was cooled to room temperature. The mixture was separated, the liquid phase was extracted with _DCM , and the organic phase was combined. It was dried over anhydrous _Na2SO4 , filtered, and concentrated under reduced pressure. The crude product was purified by column chromatography (PE) to give intermediate C (11.2 g, 28.05 mmol) as a white solid in 94.4% yield.

Step 2: Synthesis of intermediate D

In a round bottom three neck flask, C (11.2 g, 28.05 mmol), bis-pinacolatodiboron (10.7 g, 42.07 mmol), Pd(dppf)Cl ₂ (0.41 g, 0.56 mmol), KOAc (5.51 g, 56.1 mmol) were added in 1,4-dioxane (120 mL). Under N ₂ protection, the mixture was heated to reflux overnight. When the TLC plate showed the reaction was complete, the heating was stopped and the mixture was allowed to cool to room temperature. The reaction was filtered through diatomaceous earth, and the solution was filtered and concentrated under reduced pressure. The crude product was purified by column chromatography (PE/DCM=5:1-2:1) to give intermediate D (10.3 g, 23.08 mmol) as a white solid in 82.3% yield.

Step 3: Synthesis of compound A-1

In a round-bottom three-neck flask, D (4.0 g, 8.96 mmol), E (3.2 g, 8.96 mmol), Pd(PPh ₃ ) ₄ (0.31 g, 0.27 mmol), K ₂ CO ₃ (2.48 g, 17.92 mmol) were added to toluene (48 mL), EtOH (12 mL), and H ₂ O (12 mL). Under the protection of N ₂ , the mixture was heated to reflux overnight. When the TLC plate confirmed the completion of the reaction, the heating was stopped and the mixture was cooled to room temperature. The mixture was subjected to suction filtration under reduced pressure, and the obtained solid was rinsed with water and methanol in turn. The solid was further recrystallized with toluene to obtain a white solid, Compound A-1 (5.0 g, 7.79 mmol), with a yield of 87.0%. The product was confirmed as the target product, Compound A-1, with a molecular weight of 641.2.

Synthesis Example 2: Synthesis of Compound A-3

Step 1: Synthesis of compound A-3

In a round-bottom three-neck flask, D (4.46 g, 10.0 mmol), F (3.58 g, 10.0 mmol), Pd(PPh ₃ ) ₄ (0.35 g, 0.30 mmol), K ₂ CO ₃ (2.76 g, 20.0 mmol) were added to toluene (48 mL), EtOH (12 mL), and H ₂ O (12 mL). Under the protection of N ₂ , the mixture was heated to reflux overnight. When the TLC plate confirmed the completion of the reaction, the heating was stopped and the mixture was cooled to room temperature. The mixture was subjected to suction filtration under reduced pressure, and the obtained solid was rinsed with water and methanol in turn. The solid was further recrystallized with toluene to obtain a white solid, compound A-3 (5.0 g, 7.79 mmol), with a yield of 77.9%. The product was confirmed as the target product, compound A-3, with a molecular weight of 641.2.

Synthesis Example 3: Synthesis of Compound A-4

Step 1: Synthesis of compound A-4

In a round-bottom three-neck flask, D (4.46 g, 10.0 mmol), G (3.58 g, 10.0 mmol), Pd(PPh ₃ ) ₄ (0.23 g, 0.20 mmol), K ₂ CO ₃ (2.76 g, 20.0 mmol) were added to toluene (40 mL), EtOH (10 mL), and H ₂ O (10 mL). Under the protection of N ₂ , the mixture was heated to reflux overnight. When the TLC plate confirmed the completion of the reaction, the heating was stopped and the mixture was cooled to room temperature. The mixture was subjected to suction filtration under reduced pressure, and the obtained solid was rinsed with water and methanol in turn. The solid was further recrystallized with toluene to obtain a white solid, compound A-4 (5.8 g, 9.04 mmol), with a yield of 90.4%. The product was confirmed as the target product, compound A-4, with a molecular weight of 641.2.

Those skilled in the art should know that the above preparation methods are merely exemplary and may be modified to obtain the structures of other compounds of the present invention.

Examples of elements

Element Example 1

First, a glass substrate having an indium tin oxide (ITO) anode with a thickness of 80 nm was cleaned and then treated with oxygen plasma and UV ozone. After the treatment, the substrate was dried in a glove box to remove water. Then, the substrate was mounted on a substrate holder and placed in a vacuum chamber. Hereinafter, for the designated organic layers, deposition was performed on the ITO anode in order by hot vacuum deposition at a rate of 0.2 to 2 angstroms/second when the vacuum degree was about 10 ^-8 Torr. Compound HI was used as a hole injection layer (HIL). Compound HT was used as a hole transport layer (HTL). Compound H1 was used as an electron blocking layer (EBL). Compound GD23 was then doped into compound H1 and compound A-1 in the present invention, and co-deposited to be used as an emitting layer (EML). Compound H2 was used as a hole blocking layer (HBL). On the hole blocking layer, the compound ET and 8-hydroxyquinoline-lithium (Liq) were co-deposited as an electron transport layer (ETL). Finally, 1 nm of 8-hydroxyquinoline-lithium (Liq) was deposited as an electron injection layer and 120 nm of aluminum was deposited as a cathode. The device was then transferred to a glove box and encapsulated with a glass cover to complete the device.

Element Example 2

The preparation method for Device Example 2 is the same as Device Example 1, except that Compound A-3 replaces Compound A-1 in the light-emitting layer (EML).

Element Example 3

The preparation method for Device Example 3 is the same as Device Example 1, except that Compound A-4 replaces Compound A-1 in the light-emitting layer (EML).

Comparative example of element 1

The preparation method of Comparative Example 1 of the device is the same as that of Example 1 of the device, except that Compound C-1 replaces Compound A-1 in the light-emitting layer (EML).

Comparative example of element 2

The preparation method of Comparative Example 2 of the device is the same as that of Example 1 of the device, except that Compound C-2 replaces Compound A-1 in the light-emitting layer (EML).

Comparative example of element 3

The preparation method of Comparative Example 3 of the device is the same as that of Example 1 of the device, except that Compound C-3 replaces Compound A-1 in the light-emitting layer (EML).

Comparative element example 4

The preparation method of Comparative Example 4 of the device is the same as that of Example 1 of the device, except that Compound C-4 replaces Compound A-1 in the light-emitting layer (EML).

Comparative example of element 5

The preparation method of Comparative Example 5 of the device is the same as that of Example 1 of the device, except that Compound C-5 replaces Compound A-1 in the light-emitting layer (EML).

Comparative element example 6

The preparation method of Comparative Example 6 of the device is the same as that of Example 1 of the device, except that Compound C-6 replaces Compound A-1 in the light-emitting layer (EML).

Detailed layer structures and thicknesses of the elements are shown in the table below. Layers using more than one material are obtained by doping different compounds in the weight ratios mentioned above.

The structure of the material used in the element is represented as follows:

Table 2 shows the CIE data, external quantum efficiency (EQE), current efficiency (CE), and device life (LT95) measured under a constant current of 15 mA/ ^cm2 . The data of Comparative Example ¹ are used as the standard for normalization.

summary

In Example 3 and Comparative Example 1, the phosphorescent dopant GD23 is doped into compound A-4 of the present invention and compound C-1 outside the present invention, respectively. The only difference between compounds A-4 and C-1 is that the dibenzofuran group directly bonded to triazine is replaced with a dibenzothiophene group. The EQE and CE in Example 3 are equivalent to those of Comparative Example 1, but the device life is significantly improved by 61%. It has been proven that the compound having the structure represented by formula 1 according to the present invention has a longer device life when applied to an electroluminescent device compared to a compound in which dibenzothiophene is directly bonded to triazine.

In Example 2 and Comparative Example 2, the phosphorescent dopant GD23 is doped into compound A-3 of the present invention and compound C-2 outside the present invention, respectively. The only difference between compounds A-3 and C-2 is the substitution position of the aryl group in the dibenzofuran group bonded to triazine by a phenylene group. The EQE and CE in Example 2 are equivalent to those of Comparative Example 2, but the device life is significantly improved by 136%. It has been proven that the compound having the structure represented by formula 1 according to the present invention has a longer device life when applied to an electroluminescent device compared to a compound having an aryl group substituent at a position other than the 1-position of the dibenzo 5-membered ring with a bridging group between the triazine and the compound.

In Example 2 and Comparative Example 3, the phosphorescent dopant GD23 is doped into compound A-3 of the present invention and compound C-3 outside the present invention, respectively. The only difference between compounds A-3 and C-3 is whether or not the dibenzofuran bonded to triazine by a phenylene group forms a condensed ring with a phenyl group substituted at the 1-position. The EQE and CE in Example 2 are slightly improved, and the device life is improved by 53%. It has been proven that the compound having the structure represented by formula 1 according to the present invention has higher efficiency and longer device life when applied to an electroluminescent device, compared to the compound further condensed with an aryl group substituent at the 1-position of the dibenzo 5-membered ring with a bridging group between the triazine.

In Example 1 and Comparative Example 4, the phosphorescent dopant GD23 is doped into compound A-1 of the present invention and compound C-4 outside the present invention, respectively. The main difference between compounds A-1 and C-4 is that the phenyl group substituent of the dibenzofuran group bonded by the phenylene group is replaced with a substituted triazine group. The EQE and CE in Example 1 are improved by about 36%, and the device life is improved by 45.4%. It has been proven that the compound having the structure represented by formula 1 according to the present invention has a higher efficiency and a longer device life when applied to an electroluminescent device, compared to a compound having a substituted 6-membered heteroaryl group substitution at the 1-position of the dibenzo 5-membered ring with a bridging group between the triazine.

In Example 2 and Comparative Example 5, the phosphorescent dopant GD23 is doped into compound A-3 of the present invention and compound C-5 other than the present invention, respectively. The main difference between compounds A-3 and C-5 is whether the dibenzofuran group having a phenyl group substitution at the 1-position is bonded to triazine via a phenylene group. The EQE and CE in Example 2 are improved by about 5%, and the service life of the element is improved by 28.2%. It has been proven that the compound having the structure represented by formula 1 according to the present invention can improve the overall performance of the element when applied to an electroluminescence element, compared to a compound in which a dibenzo 5-membered ring having an aryl group substitution at the 1-position is directly bonded to triazine.

In Example 2 and Comparative Example 6, the phosphorescent dopant GD23 is doped into Compound A-3 of the present invention and Compound C-6 outside the present invention, respectively. The only difference between Compound A-3 and Compound C-6 is that Compound A-3 has an aryl group substituent at the 1-position of the dibenzofuran group bonded to the triazine by a phenylene group. Compared to Comparative Example 6, the EQE and CE in Example 2 are equivalent, but the device life is improved by 28.7%. It has been proven that the compound having the structure represented by Formula 1 according to the present invention has a longer device life when applied to an electroluminescent device compared to a compound having no aryl group substituent on the dibenzo 5-membered ring with a bridging group between it and the triazine.

In short, when the compound of the present invention is used as a host material in the light-emitting layer, it can improve the material's electron and hole transport balance ability, and compared with the case where a compound other than the present invention is used as a host material in the light-emitting layer, the efficiency (EQE and CE) of the device is comparable or somewhat improved, while the service life of the device is greatly improved, so that the overall performance of the device can be greatly improved. It is very useful to the industry.

It should be understood that the various embodiments described herein are illustrative only and are not intended to limit the scope of the invention. As such, it will be apparent to one of ordinary skill in the art that the invention sought to be protected includes variations of the specific and preferred embodiments described herein. Other materials and structures can be substituted for many of the materials and structures described herein without departing from the spirit and scope of the invention. It should be understood that the various theories as to why the invention works are not limiting.

REFERENCE SIGNS LIST 100 Organic light-emitting device 101 Substrate 102 Encapsulating layer 110 Anode 120 Hole injection layer 130 Hole transport layer 140 Electron blocking layer 150 Light-emitting layer 160 Hole blocking layer 170 Electron transport layer 180 Electron injection layer 190 Cathode 200 Organic light-emitting device

Claims (19)

A compound having a structure according to formula 1,

X is selected from O, S or Se;
X ₁ to X ₆ are each identically or differently selected from CR _x or N at each occurrence;
Z ₁ to Z ₈ are, at each occurrence, the same or different, selected from C, _CRz or N, and one of Z ₁ to Z ₄ is selected from C and is bonded to L ₂ ;
Ar, at each occurrence, is the same or different and is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;
L ₁ is, each occurrence, the same or different, selected from a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 16 carbon atoms, or a combination thereof;
_L2 , which may be the same or different at each occurrence, is selected from a single bond ;
R _y is the same or different at each occurrence and represents mono-, poly- or no substitution;
R _x and R _z each occur the same or different and each represent a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryloxy ... a substituted or unsubstituted alkynyl group having 6 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms , a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group , and combinations thereof;
R _y each occurrence may be the same or different and may be hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 3 ... a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms , a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group , and combinations thereof;
Adjacent substituents R _x may be bonded to form a ring,
Adjacent substituents R _y may be bonded to form a ring,
Adjacent substituents R _z may be bonded to form a ring.
The compound is not the following compound:

2. The compound of claim 1, wherein X is selected from O or S. The compound of claim 1 , wherein X is selected from O. The compound according to claim 1, wherein X ₁ to X ₆ , at each occurrence, are the same or different and selected from CR _x , and/or Z ₁ to Z ₈ , at each occurrence, are the same or different and selected from C or CR _z , and one of Z ₁ to Z ₄ is selected from C and is bonded to L ₂ . 2. The compound according to claim 1 , wherein each occurrence of L ₁ is the same or different and is selected from substituted or unsubstituted arylene groups having 6 to 20 carbon atoms. L ₁ 2. The compound of claim 1, wherein each occurrence is the same or different and is selected from a substituted or unsubstituted phenylene group, a substituted or unsubstituted biphenylene group, a substituted or unsubstituted naphthylene group, or a combination thereof. The compound of claim 1, wherein R _x , R _y and R _z , at each occurrence, are the same or different and are selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 20 carbon atoms, and combinations thereof. R _x , R _y and R _Z is, at each occurrence, the same or differently selected from the group consisting of hydrogen, deuterium, a substituted or unsubstituted phenyl group, a substituted or unsubstituted pyridine group, a substituted or unsubstituted naphthalene group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted triphenylene group, a substituted or unsubstituted fluorene group, a substituted or unsubstituted carbazole group, a substituted or unsubstituted dibenzofuran group, a substituted or unsubstituted dibenzothiophene group, and combinations thereof. The compound according to claim 1, wherein each occurrence of Ar is the same or different and is selected from a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 20 carbon atoms, or a combination thereof. 2. The compound of claim 1, wherein Ar, at each occurrence, is the same or different and is selected from the group consisting of a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthalene group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted triphenylene group, a substituted or unsubstituted fluorene group, a substituted or unsubstituted carbazole group, a substituted or unsubstituted dibenzofuran group, a substituted or unsubstituted dibenzothiophene group, and combinations thereof. 2. The compound of claim 1, wherein the compound is selected from the group consisting of the following compounds:

(The hydrogen atoms in the above Compounds A-1 to A-58, A-60 to A-62, A-64 to A-138, and A-151 to A-262 may be partially or completely deuterated.) An organic electroluminescence device comprising an anode, a cathode, and an organic layer provided between the anode and the cathode, wherein at least one of the organic layers comprises the compound according to any one of claims 1 to 11 . the organic layer containing the compound is an emitting layer,
The compound is a host compound,
The organic electroluminescence device according to claim 12 , wherein the light-emitting layer contains at least a first metal complex. 14. The organic electroluminescent device of claim 13 , wherein the first metal complex has a general formula of M( _La ) _m ( _Lb ) _n ( _Lc ) _q .
(Metal M is selected from metals having a relative atomic mass greater than 40;
Ligands L _a , L _b and L _c are first, second and third ligands coordinated with said metal M, respectively, and the ligands L _a , L _b and L _c may be the same or different;
The ligands L _a , L _b and L _c may be linked to form a multidentate ligand;
m is 1, 2 or 3, n is 0, 1 or 2, q is 0, 1 or 2, the sum of m, n and q is equal to the participation state of the metal M, when m is 2 or more, a plurality of L _a may be the same or different, when n is 2, two L _b may be the same or different, when q is 2, two L _c may be the same or different,
The ligand L _a has a structure represented by formula 2:

Ring _C1 and ring _C2 each occur the same or different and are selected from an aromatic ring having 5 to 30 ring atoms, a heteroaromatic ring having 5 to 30 ring atoms, or a combination thereof;
_Q1 and _Q2 are the same or different at each occurrence and are selected from C or N;
R ₁₁ and R ₁₂ are the same or different and each occurrence represents mono-, poly- or unsubstituted;
R ₁₁ and R ₁₂ each occurrence are the same or different and each occurrence is selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted selected from the group consisting of alkynyl groups having 2 to 20 carbon atoms, substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6 to 20 carbon atoms, substituted or unsubstituted amino groups having 0 to 20 carbon atoms , cyano groups, isocyano groups, hydroxyl groups, sulfanyl groups , and combinations thereof;
Adjacent substituents R ₁₁ and R ₁₂ may be bonded to form a ring;
The ligands _Lb and _Lc at each occurrence are the same or different and are selected from monoanionic bidentate ligands . The ligand L _b and L _c may be the same or different for each occurrence.

Selected from the group consisting of:
R _a and R _b represents, identically or differently, a single substitution, a multiple substitution, or no substitution at each occurrence;
X _b Each occurrence may be the same or different and may be O, S, Se, NR _N1 and C.R. _C1 R _C2 Selected from the group consisting of:
X _c and X _d Each occurrence may be the same or different and may be O, S, Se, or NR _N2 Selected from the group consisting of:
R _a , R _b , R _c , R _N1 , R _N2 , R _C1 and R _C2 each occurrence is the same or different and represents hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 2 to 20 ring ... a substituted or unsubstituted alkynyl group having 6 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, and combinations thereof;
Adjacent Substituents R _a , R _b , R _c , R _N1 , R _N2 , R _C1 and R _C2 may be bonded to form a ring, the organic electroluminescence device according to claim 14 . 14. The organic electroluminescence device according to claim 13, wherein the light-emitting layer further comprises a second host compound, the second host compound comprising at least one chemical group selected from the group consisting of benzene, pyridine, pyrimidine, triazine, carbazole, azacarbazole, indolocarbazole, dibenzothiophene, azadibenzothiophene, dibenzofuran, azadibenzofuran, dibenzoselenophene, triphenylene, azatriphenylene, fluorene, silicon fluorene, naphthalene, quinoline, isoquinoline, quinazoline, quinoxaline , phenanthrene, azaphenanthrene, and combinations thereof. The organic electroluminescence device according to claim 16 , wherein the second host compound has a structure represented by Formula 3 or Formula 4.

G is, at each occurrence, the same or different, selected from C(R _g ) ₂ , NR _g , O or S;
L _T is, at each occurrence, the same or different, selected from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof;
T is, identically or differently, selected from C, _CRt, or N at each occurrence;
R _t and R _g each occur the same or different and each represent hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 3 ... is selected from the group consisting of unsubstituted heteroaryl groups having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6 to 20 carbon atoms, substituted or unsubstituted amino groups having 0 to 20 carbon atoms , cyano groups, isocyano groups, hydroxyl groups, sulfanyl groups , and combinations thereof;
Ar ₁ , each occurrence being the same or different, is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;
Adjacent substituents R _t and R _g may be bonded to form a ring. The second host compound has a structure represented by one of formulas 3-a to 3-j and 4-a to 4-f,

In formula 3-a to formula 3-j, T, L _T and Ar ₁ have the same definitions as those in formula 3,
The organic electroluminescence device according to claim 17, wherein in formulae 4-a to 4-f, T, G, L _T and Ar ₁ have the same definitions as those in formula 4. A compound composition comprising the compound according to any one of claims 1 to 11 .

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