JP2000044941A - Luminous element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminous element which stably emits a red light, is capable of high-luminance emission even at a low electric current, emits light by the action of electric energy, and contains a luminescent material between an anode and a cathode, by using a compound having an isobenzothiophene structure as a luminescent material. SOLUTION: A compound is used which is represented by the formula (wherein R1 to R6 are each H, an alkyl, a cycloalkyl, an aralkyl, an alkenyl, a cycloalkenyl, an alkynyl, hydroxyl, mercapto, an alkoxyl, an alkylthio, an aryl ether group, an aryl thioether groups, an aryl, a heterocyclic group, a halogen, a haloalkane group, a haloalkene group, a haloalkyne group, cyano, aldehydo, carbonyl, carboxy, an ester group, carbamoyl, amino, nitro, silyl, or siloxanyl, or may be combined with the adjacent substituent to form a fused ring, heterocylic, or alicyclic group). The luminous material is desirable as a dopant material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an element capable of converting electric energy into light, and relates to a display element, a flat panel display, a backlight, lighting, an interior, a sign, a sign, an electrophotographic device, an optical signal generator, and the like. The present invention relates to a light emitting element that can be used in the field of (1).

[0002]

2. Description of the Related Art In recent years, studies have been actively conducted on organic laminated thin-film light emitting devices in which electrons injected from a cathode and holes injected from an anode emit light when they recombine in an organic phosphor sandwiched between both electrodes. ing. This device has attracted attention because it is thin, emits light with high luminance under a low driving voltage, and emits multicolor light by selecting a fluorescent material.

[0003] This study was carried out by Kodak Corporation. W. Tan
g. et al. showed that the organic laminated thin film element emits light with high luminance (Appl. Phys. Lett. 51 (12)
21, p. 913, 1987), and many research institutions are conducting studies. A typical configuration of an organic laminated thin film light emitting device presented by a research group of Kodak Company is a diamine compound having a hole transporting property and a light emitting layer on an ITO glass substrate.
Aluminum hydroxyquinoline and M as cathode
g: Ag was sequentially provided, and green light emission of 1000 cd / m ² was possible at a driving voltage of about 10 V. The present organic laminated thin-film light-emitting device has a different configuration, such as a device provided with an electron transport layer in addition to the above-described device components, but basically follows the configuration of Kodak Company.

[0004] Among multicolor light emission, red light emission has been studied as a useful light emission color. Conventionally, perylene-based materials such as bis (diisopropylphenyl) perylene, perinone-based materials, and Eu complex (Eu (DBM) 3 (Phen)) have been known as red light-emitting materials.

As a technique for obtaining red light emission, a method of mixing a small amount of a red fluorescent material as a dopant into a host material is also being studied. As the host material, tris (8-quinolinolato) aluminum complex, bis (1
0-benzoquinolinolato) beryllium complex (Japanese Unexamined Patent Publication No.
322362), a diarylbutadiene derivative,
Stilbene derivatives, benzoxazole derivatives, benzothiazole derivatives (JP-A-63-264692)
And 4- (dicyanomethylene) -2-methyl-6- (p-dimethylaminostyryl) -4H-pyran and metal phthalocyanine (M
gPc, AlPcCl), a squarylium compound (JP-A-6-93257), and a biolanthrone compound (JP-A-7-90259) were used to emit red light.

[0006]

However, conventional red light-emitting materials (host material and dopant material) have low light-emitting characteristics, and therefore, when used as a display light-emitting material, have low luminance with respect to electric power or have sufficient color purity. I couldn't get it. Further, even if it is obtained, the driving current is high due to the low luminous efficiency, the load on the element is large, and the element life is generally short.

An object of the present invention is to solve such a problem and to provide a stable red light-emitting element capable of emitting high-luminance light even under a low current.

[0008]

According to the present invention, there is provided an element which emits light by electric energy in which a substance responsible for light emission exists between an anode and a cathode, and the element is represented by the following general formula (1). A light-emitting element including a compound.

[0009]

Embedded image (Where R1 to R6 may be the same or different, and each may be hydrogen, an alkyl group, a cycloalkyl group, an aralkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a mercapto group, an alkoxy group, an alkylthio group, or an aryl group. Ether group, arylthioether group,
Aryl group, heterocyclic group, halogen, haloalkane, haloalkene, haloalkyne, cyano group, aldehyde group, carbonyl group, carboxyl group, ester group, carbamoyl group, amino group, nitro group, silyl group, siloxanyl group, It is selected from a condensed ring, a heterocyclic ring and an aliphatic ring formed therebetween. )

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the anode is made of a conductive metal oxide such as tin oxide, indium oxide, indium tin oxide (ITO) or a metal such as gold, silver or chromium if it is transparent to extract light. Although not particularly limited, such as metals, inorganic conductive substances such as copper iodide and copper sulfide, and conductive polymers such as polythiophene, polypyrrole, and polyaniline, it is particularly preferable to use ITO glass or Nesa glass. The resistance of the transparent electrode is not limited as long as a current sufficient for light emission of the element can be supplied, but is preferably low from the viewpoint of power consumption of the element. For example, 3
Although an ITO substrate having a resistance of 00 Ω / □ or less functions as an element electrode, a substrate having a resistance of about 10 Ω / □ can be supplied at present. The thickness of the ITO can be arbitrarily selected according to the resistance value, but is usually used in a range of usually 100 to 300 nm. Further, the glass substrate is made of soda lime glass, non-alkali glass, or the like, and the thickness only needs to be sufficient to maintain mechanical strength.
mm or more is sufficient. For the glass material,
Alkali-free glass is preferred because less ions elute from the glass is preferred, but soda-lime glass with a barrier coat such as SiO ₂ is also commercially available and can be used. The ITO film forming method includes an electron beam method,
There is no particular limitation on the sputtering method, the chemical reaction method and the like.

The cathode is not particularly limited as long as it can efficiently inject electrons into the organic material layer.
Gold, silver, copper, iron, tin, zinc, aluminum, indium, chromium, lithium, sodium, potassium, calcium, magnesium, etc., and lithium, sodium for improving the electron injection efficiency and improving the device characteristics , Potassium, calcium, magnesium or alloys containing these low work function metals are effective. But,
These low work function metals are generally unstable in the air in many cases. For example, an organic layer is doped with a very small amount of lithium or magnesium (1 nm or less as indicated by a film thickness gauge by vacuum deposition) to have high stability. Although a method using an electrode can be mentioned as a preferable example, it is not particularly limited because an inorganic salt such as lithium fluoride can be used. In addition, platinum, gold,
Lamination of metals such as silver, copper, iron, tin, aluminum, and indium, or alloys using these metals, and inorganic substances such as silica, titania, and silicon nitride, polyvinyl alcohol, vinyl chloride, and hydrocarbon polymers. Are preferred examples. The method for producing these electrodes is not particularly limited as long as electrical conduction such as resistance heating, electron beam, sputtering, ion plating, and coating can be achieved.

The substance which controls light emission includes: 1) a hole transport layer / a light emitting layer, 2) a hole transport layer / a light emitting layer / an electron transport layer, 3) a light emitting layer / an electron transport layer, and 4) a combination of the above. Any of the forms in which the combined substances are mixed together may be used. That is, as the element configuration, in addition to the multilayer laminated structure of the above 1) to 3), a single layer of a luminescent material alone or a layer containing a luminescent material and a hole transporting material or an electron transporting material may be provided as in 4).

The light emitting material may be either a host material alone or a combination of a host material and a dopant material. In addition, the dopant material may be included in the entire host material, partially, or may be included. The dopant material may be stacked, dispersed, or the like.

The hole transporting layer is formed by a hole transporting substance alone or by laminating and mixing two or more kinds of substances or by a mixture of a hole transporting substance and a polymer binder. N, N'-diphenyl-N, N'-di (3-methylphenyl) -4,4'-diphenyl-1,1'-diamine, N, N'-dinaphthyl-N, N'-diphenyl-
Triphenylamines such as 4,4′-diphenyl-1,1′-diamine, bis (N-allylcarbazole) or bis (N-alkylcarbazole), pyrazoline derivatives, stilbene compounds, hydrazone compounds, oxadi Heterocyclic compounds represented by azole derivatives, phthalocyanine derivatives, porphyrin derivatives, and polycarbonates having the above monomers in the side chain, styrene derivatives, polyvinyl carbazole, polysilane, and the like are preferable in the polymer system. However, the compound is not particularly limited as long as it can inject holes from the anode and can transport holes.

The luminescent material according to the present invention may be used as a host material, but is preferably used as a dopant material. Since the fluorescence quantum efficiency is high, the peak of the fluorescence spectrum is sharp, and the color purity is good, the emission wavelength of the host material can be efficiently converted. The light-emitting material according to the present invention may be used as a blue light-emitting material or a green light-emitting material, but is particularly suitable for emitting light having a longer wavelength than green, especially reddish light. It contains a compound having the shown isobenzothiophene structure.

[0016]

Embedded image Here, R1 to R6 may be the same or different and each may be hydrogen, an alkyl group, a cycloalkyl group, an aralkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a mercapto group, an alkoxy group, an alkylthio group, or an aryl ether. Group, arylthioether group,
Aryl group, heterocyclic group, halogen, haloalkane, haloalkene, haloalkyne, cyano group, aldehyde group, carbonyl group, carboxyl group, ester group, carbamoyl group, amino group, nitro group, silyl group, siloxanyl group, It is selected from a condensed ring, a heterocyclic ring and an aliphatic ring formed therebetween.

In the description of these substituents, the alkyl group means a saturated aliphatic hydrocarbon group such as a methyl group, an ethyl group, a propyl group and a butyl group, which may be unsubstituted or substituted. Absent. The cycloalkyl group is, for example, cyclopropyl, cyclohexyl, norbornyl, shows a saturated alicyclic hydrocarbon group such as adamantyl,
This may be unsubstituted or substituted. Also,
The aralkyl group refers to an aromatic hydrocarbon group via an aliphatic hydrocarbon such as a benzyl group and a phenylethyl group, and the aliphatic hydrocarbon and the aromatic hydrocarbon may be unsubstituted or substituted. . The alkenyl group refers to an unsaturated aliphatic hydrocarbon group containing a double bond such as a vinyl group, an allyl group and a butadienyl group, which may be unsubstituted or substituted. Further, the cycloalkenyl group refers to an unsaturated alicyclic hydrocarbon group containing a double bond such as a cyclopentenyl group, a cyclopentadienyl group, and a cyclohexene group, which may be unsubstituted or substituted. . The alkynyl group means an unsaturated aliphatic hydrocarbon group containing a triple bond such as an acetylenyl group, which may be unsubstituted or substituted. The alkoxy group refers to an aliphatic hydrocarbon group via an ether bond such as a methoxy group,
The aliphatic hydrocarbon group may be unsubstituted or substituted. The alkylthio group is obtained by substituting the oxygen atom of the ether bond of the alkoxy group with a sulfur atom.
Further, the aryl ether group refers to an aromatic hydrocarbon group via an ether bond such as a phenoxy group, and the aromatic hydrocarbon group may be unsubstituted or substituted. Further, the arylthioether group is a group in which an oxygen atom of an ether bond of the arylether group is substituted with a sulfur atom. Further, the aryl group is, for example, a phenyl group,
Naphthyl group, biphenyl group, phenanthryl group, terphenyl group, represents an aromatic hydrocarbon group such as a pyrenyl group,
This may be unsubstituted or substituted. Also,
The heterocyclic group is, for example, a thienyl group, a furyl group, a pyrrolyl group, an imidazolyl group, a pyrazolyl group, an oxazolyl group,
A cyclic structure group having an atom other than carbon, such as a pyridyl group, a pyrazyl group, a pyrimidyl group, a quinolinyl group, an isoquinolyl group, a quinoxalyl group, an acridinyl group, and a carbazolyl group, may be unsubstituted or substituted. Halogen refers to fluorine, chlorine, bromine and iodine. Haloalkanes, haloalkenes and haloalkynes are, for example, the aforementioned alkyl groups such as trifluoromethyl groups,
Part or all of an alkenyl group and an alkynyl group are those substituted with the above-mentioned halogen, and the remaining part may be unsubstituted or substituted. Aldehyde group,
The carbonyl group, ester group, carbamoyl group and amino group include those substituted with aliphatic hydrocarbons, alicyclic hydrocarbons, aromatic hydrocarbons, heterocycles, etc., and further include aliphatic hydrocarbons and alicyclic hydrocarbons. Hydrogen, aromatic hydrocarbon and heterocycle may be unsubstituted or substituted. The silyl group indicates a silicon compound group such as a trimethylsilyl group, which may be unsubstituted or substituted. The siloxanyl group refers to a silicon compound group via an ether bond such as a trimethylsiloxanyl group, which may be unsubstituted or substituted.

When the compound used in the present invention is used as a red light emitting material, the peak of the emission wavelength is preferably longer than 580 nm. Therefore, as the compound having the isobenzothiophene structure, a dithioisobenzothiophene structure represented by the following general formula (2) is desirable.

[0019]

Embedded image Here, R7 to R16 may be the same or different, and each represents hydrogen, an alkyl group, a cycloalkyl group, an aralkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a mercapto group, an alkoxy group, an alkylthio group, or an aryl ether. Group, arylthioether group,
Aryl group, heterocyclic group, halogen, haloalkane, haloalkene, haloalkyne, cyano group, aldehyde group, carbonyl group, carboxyl group, ester group, carbamoyl group, amino group, nitro group, silyl group, siloxanyl group, It is selected from a condensed ring, a heterocyclic ring and an aliphatic ring formed therebetween.

When the compound having the isobenzothiophene structure is used as a red light-emitting material, in order to obtain excellent color purity characteristics, the peak of the light emission wavelength is 610.
About 660 nm is more preferable. Therefore, as the compound having the isobenzothiophene structure, a vinyl dithioisobenzothiophene structure represented by the following general formula (3) is more preferable.

[0021]

Embedded image Here, R17 to R26 may be the same or different, and each represents hydrogen, an alkyl group, a cycloalkyl group, an aralkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a mercapto group, an alkoxy group, an alkylthio group, or an aryl ether. Group, arylthioether group, aryl group, heterocyclic group, halogen, haloalkane,
Haloalkenes, haloalkynes, cyano groups, aldehyde groups, carbonyl groups, carboxyl groups, ester groups, carbamoyl groups, amino groups, nitro groups, silyl groups, siloxanyl groups, fused rings formed between adjacent substituents, heterocycles and A group selected from aliphatic rings, and
At least one of 17 to R22 is represented by the following general formula (4)
Is a group represented by

[0022]

Embedded image R27, R28, and R29 in the general formula (4) may be the same or different, and each may be hydrogen, an alkyl group,
Cycloalkyl group, aralkyl group, alkenyl group, cycloalkenyl group, alkynyl group, hydroxyl group, mercapto group, alkoxy group, alkylthio group, arylether group, arylthioether group, aryl group, heterocyclic group,
It is selected from halogen, haloalkane, haloalkene, haloalkyne, cyano group, aldehyde group, carbonyl group, carboxyl group, ester group, carbamoyl group, amino group, nitro group, silyl group and siloxanyl group.

The compounds having the isobenzothiophene structure include the following structures.

[0024]

Embedded image

Embedded image

Embedded image The dopant material to be added to the light-emitting material is not limited to one kind of the compound having the isobenzothiophene structure, and a plurality of the compounds may be used as a mixture, or one or more kinds of known dopant materials may be mixed with the compound. May be used. Specifically, conventionally known perylenes such as bis (diisopropylphenyl) perylene, perinones, and Eu complexes (Eu (DBM) 3 (Phen)), 4- (dicyanomethylene) -2-methyl Coexist with -6- (p-dimethylaminostyryl) -4H-pyran and its analogs, metal phthalocyanines (MgPc, AlPcCl, etc.), pyromethene compounds such as hexamethylcyanopyrromethene difluoroborate, rhodamine compounds and oxazine compounds However, the present invention is not limited to these.

The host material is not particularly limited, but is a coordinator of a condensed ring derivative such as anthracene or pyrene, an aromatic ring or vinyl derivative of 8-quinolinol or 8-quinolinol which has been known as a luminous substance. Metal chelated oxinoid compounds, bisstyryl derivatives such as bisstyrylanthracene derivatives and distyrylbenzene derivatives, tetraphenylbutadiene derivatives, coumarin derivatives, oxadiazole derivatives, pyrrolopyridine derivatives, perinone derivatives, cyclopentadiene derivatives, oxadiazole For derivatives, thiadiazolopyridine derivatives, and polymer systems, polyphenylenevinylene derivatives, polyparaphenylene derivatives, and polythiophene derivatives can be used.

As the electron transporting material in the present invention,
It is necessary to efficiently transport electrons from the negative electrode between the electrodes to which an electric field is applied, and it is desirable that the electron injection efficiency is high and the injected electrons are transported efficiently. For this purpose, it is required that the material has a high electron affinity, a high electron mobility, a high stability, and a small amount of impurities serving as traps during production and use. Materials satisfying such conditions include quinolinol derivative metal complexes represented by 8-hydroxyquinoline aluminum, tropolone metal complexes, flavonol metal complexes, perylene derivatives, perinone derivatives, naphthalene,
There are coumarin derivatives, oxadiazole derivatives, aldazine derivatives, bisstyryl derivatives, pyrazine derivatives, phenanthroline derivatives, and the like, but are not particularly limited. Although these electron transport materials are used alone,
They may be laminated or mixed with different electron transport materials.

The above materials used for the hole transporting layer, the light emitting layer and the electron transporting layer can be used alone to form each layer. As the polymer binder, polyvinyl chloride, polycarbonate, polystyrene, poly (N- Vinyl carbazole), polymethyl methacrylate, polybutyl methacrylate, polyester, polysulfone, polyphenylene oxide, polybutadiene, hydrocarbon resin, ketone resin, phenoxy resin, polysulfone, polyamide,
Solvent-soluble resins such as ethyl cellulose, vinyl acetate, ABS resin, polyurethane resin, phenolic resin, xylene resin, petroleum resin, urea resin, melamine resin, unsaturated polyester resin, alkyd resin, epoxy resin,
It is also possible to use the resin dispersed in a curable resin such as a silicone resin.

The method for forming the substance which controls light emission is not particularly limited, such as resistance heating evaporation, electron beam evaporation, sputtering, molecular lamination, and coating method. Preferred in terms of surface. The thickness of the layer cannot be limited because it depends on the resistance of the substance that controls light emission, but is selected from the range of 10 to 1000 nm.

Although the electric energy mainly indicates a direct current, a pulse current or an alternating current can also be used.
The current value and the voltage value are not particularly limited. However, in consideration of the power consumption and life of the device, it is necessary to obtain the maximum luminance with the lowest possible energy.

The matrix in the present invention refers to a matrix in which pixels for display are arranged in a lattice, and displays a character or an image by a set of pixels. The shape and size of the pixel depend on the application. For example, a square pixel having a side of 300 μm or less is usually used for displaying images and characters on a personal computer, a monitor, and a television. . In the case of monochrome display, pixels of the same color may be arranged, but in the case of color display, red, green and blue pixels are displayed side by side. In this case, there are typically a delta type and a stripe type. The matrix may be driven by either a line-sequential driving method or an active matrix. The line-sequential driving has the advantage that the structure is simpler, but the active matrix is sometimes superior when the operating characteristics are taken into consideration.

In the present invention, the segment type is a pattern in which predetermined information is displayed and a pattern is formed.
Light is emitted from the determined area. For example, there are a time display and a temperature display on a digital clock or a thermometer, an operation state display of an audio device, an electromagnetic cooker, or the like, and a panel display of an automobile. The matrix display and the segment display may coexist in the same panel.

The backlight in the present invention is mainly used for improving the visibility of a display device that does not emit light, and is used for a liquid crystal display device, a clock, an audio device, an automobile panel, a display panel, a sign, and the like. . In particular, as a backlight for a liquid crystal display device, especially a personal computer application in which thinning is an issue, considering that it is difficult to reduce the thickness because the conventional type is made of a fluorescent lamp or a light guide plate, the present invention The backlight is thin and lightweight.

[0033]

The present invention will be described below with reference to examples and comparative examples, but the present invention is not limited to these examples.

Example 1 A glass substrate on which an ITO transparent conductive film was deposited to a thickness of 150 nm (a product of Asahi Glass Co., Ltd., 15 Ω / □, electron beam deposited) was used for 30
The wafer was cut into a size of 40 mm and etched. The obtained substrate was subjected to ultrasonic cleaning with acetone and semicocrine 56 for 15 minutes each, and then with ultrapure water. Subsequently, the substrate was subjected to ultrasonic cleaning with isopropyl alcohol for 15 minutes, immersed in hot methanol for 15 minutes, and dried. This substrate was subjected to UV-ozone treatment for 1 hour immediately before producing the element, placed in a vacuum evaporation apparatus, and evacuated until the degree of vacuum in the apparatus became 5 × 10 ⁻⁵ Pa or less. First, 4,4′-bis (N- (m-tolyl) -N-phenylamino) biphenyl was deposited as a hole transporting material to a thickness of 100 nm by a resistance heating method. Next, a tris (8-quinolinolato) aluminum complex was used as a host material, and 5,5′-distyryl-1,3-di (2-thienyl) benzo [c] thiophene was used as a dopant material (the fluorescence peak wavelength in a dichloromethane solution was 620 nm).
m) so that the dopant is 1 wt%.
Co-deposited to a thickness of 70 nm, and the host material was laminated to a thickness of 70 nm. Next, 0.5 nm of lithium and 200 nm of aluminum were vapor-deposited to form a cathode, and a 5 × 5 mm square element was produced. This light emitting device emitted red light having a peak wavelength at 620 nm.

Example 2 5,5'-bis (2-thienylvinyl) -1,3-di (2-thienyl) benzo [c] thiophene (a fluorescent peak wavelength in a dichloromethane solution was 64
0 nm) except that 5 × 5
An mm square device was produced.

The light emitting device emitted red light having a peak wavelength at 640 nm.

Comparative Example 1 Tetrapyridylporphyrin (D
A 5 × 5 mm square device was produced in the same manner as in Example 1 except that the fluorescence peak wavelength in the MF solution was 656 nm).

This light-emitting element emitted orange light because of strong green light emission from the host material itself.

[0039]

According to the present invention, it is possible to provide a red light emitting device having a high use efficiency of electric energy.

Claims (9)

[Claims] An element which emits light by electric energy, wherein a substance which controls light emission exists between an anode and a cathode, wherein the element contains a compound represented by the following general formula (1). Light emitting element. Embedded image (Where R1 to R6 may be the same or different, and each may be hydrogen, an alkyl group, a cycloalkyl group, an aralkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a mercapto group, an alkoxy group, an alkylthio group, or an aryl group. Ether group, arylthioether group,
Aryl group, heterocyclic group, halogen, haloalkane, haloalkene, haloalkyne, cyano group, aldehyde group, carbonyl group, carboxyl group, ester group, carbamoyl group, amino group, nitro group, silyl group, siloxanyl group, It is selected from a condensed ring, a heterocyclic ring and an aliphatic ring formed therebetween. ) 2. The light emitting device according to claim 1, wherein said compound is represented by the following general formula (2). Embedded image (Where R7 to R16 may be the same or different and each represents a hydrogen, an alkyl group, a cycloalkyl group, an aralkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a mercapto group, an alkoxy group, an alkylthio group, an aryl Ether group, arylthioether group, aryl group, heterocyclic group, halogen, haloalkane,
Haloalkenes, haloalkynes, cyano groups, aldehyde groups, carbonyl groups, carboxyl groups, ester groups, carbamoyl groups, amino groups, nitro groups, silyl groups, siloxanyl groups, fused rings formed between adjacent substituents, heterocycles and Selected from aliphatic rings. ) 3. The light emitting device according to claim 1, wherein said compound is represented by the following general formula (3). Embedded image (Where R17 to R26 may be the same or different and each represents a hydrogen, an alkyl group, a cycloalkyl group, an aralkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a mercapto group, an alkoxy group, an alkylthio group, an aryl Ether group, arylthioether group, aryl group, heterocyclic group, halogen, haloalkane,
Haloalkenes, haloalkynes, cyano groups, aldehyde groups, carbonyl groups, carboxyl groups, ester groups, carbamoyl groups, amino groups, nitro groups, silyl groups, siloxanyl groups, fused rings formed between adjacent substituents, heterocycles and A group selected from aliphatic rings, and
At least one of 17 to R22 is represented by the following general formula (4)
Is a group represented by Embedded image R27, R28, and R29 may be the same or different, and each represents hydrogen, an alkyl group, a cycloalkyl group, an aralkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a mercapto group, an alkoxy group, an alkylthio group, or an aryl group. Ether group, arylthioether group, aryl group, heterocyclic group, halogen, haloalkane, haloalkene, haloalkyne, cyano group, aldehyde group, carbonyl group, carboxyl group, ester group, carbamoyl group, amino group, nitro group, silyl group,
It is selected from siloxanyl groups. ) 4. The light emitting device according to claim 1, wherein said compound is a light emitting material. 5. The light emitting device according to claim 1, wherein said compound is a dopant material. 6. The light emitting device according to claim 1, wherein said light emitting device comprises an anode, a hole transport material, a light emitting material, and a cathode. 7. The light emitting device according to claim 1, wherein an anode, a hole transport material, a light emitting material, and a cathode of the light emitting element have a laminated structure.
6. The light-emitting device according to any one of claims 5 to 5. 8. The light emitting device according to claim 1, wherein the light emitting device is a display for displaying by a matrix and / or a segment method. 9. The light emitting device according to claim 1, wherein the light emitting device is a backlight.