CN108666430A - A kind of high performance electroluminescent organic device - Google Patents
A kind of high performance electroluminescent organic device Download PDFInfo
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- CN108666430A CN108666430A CN201710483247.7A CN201710483247A CN108666430A CN 108666430 A CN108666430 A CN 108666430A CN 201710483247 A CN201710483247 A CN 201710483247A CN 108666430 A CN108666430 A CN 108666430A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
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- H10K30/865—Intermediate layers comprising a mixture of materials of the adjoining active layers
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Abstract
The invention belongs to light emitting device technologies fields, more particularly, to a kind of high performance electroluminescent organic device.It includes transparent substrates, anode, organic function layer, cathode, power supply；The upper end of the transparent substrates is connected with anode, and the upper end right half part of anode is connected with organic function layer, and the upper end of organic function layer is connected with cathode, and the left end of cathode is connected with power supply, and the other end of power supply is connected on anode；Wherein, the organic function layer is by hole transmission layer, exciton blocking separating layer, luminescent layer；It is sequentially distributed from the bottom up as hole transmission layer, exciton blocking separating layer and luminescent layer.It solves the problems, such as it is to improve exciton quantity in luminescent layer, improve electron amount in luminescent layer, and then improve the balanced degree of electrons and holes, to provide the light emission luminance and efficiency of device, it solves the problems, such as interface Exciplex emission simultaneously, obtains shining for stable luminescent material/system.
Description
Technical field
The invention belongs to light emitting device technologies fields, more particularly, to a kind of high performance electroluminescent organic device.
Background technology
Organic electroluminescence device (OLED) has from main light emission, driving voltage is low, high-low temperature resistant, all solidstate, wide viewing angle,
Many advantages, such as fast response time, display color be abundant and high contrast, it is particularly possible to make on flexible substrates, flexibility is made
Display device, and it can also be prepared into transparence display device, therefore OLED has broad application prospects, in commercial field
OLED display screen can be adapted for POS machine and ATM machine, duplicator, game machine etc.；It is then applicable to mobile phone, shifting in communication field
The fields such as the dynamic network terminal；It can then be widely applied on PDA, commercialization PC and home PC, laptop in computer realm；Disappear
Take electronic product field, is then applicable to stereo set, digital camera, portable DVD player；Then it is suitable in industrial application
Instrument and meter etc.；In field of traffic then on GPS, aircraft instrument；And household appliance technical field OLED TVs, even more industry most close
One of application of note.
OLED device generally use sandwich structure, i.e., press from both sides organic layer structure between cathode and anode, current multilayer is organic
Layer structure be usually：Hole injection layer/hole transmission layer/luminescent layer/hole blocking layer/electron transfer layer/electron injecting layer,
The interface of organic layer and electrode can introduce buffer layer and improve carrier injectability.The light emission luminance of OLED device with from the two poles of the earth
Injected holes, electronic carrier quantity, both related, the luminous efficiency that is compounded to form exciton situation, exciton relaxation lighting conditions
It is related to the degree of balance in hole in luminescent layer and electron amount.In common this structure, hole is majority carrier, and electronics is
Minority carrier, therefore the quantity of electronics in OLED device how is improved, it is the key that improve device light emission luminance and efficiency.
OLED device is at least made of two organic function layers, and the interface of layer and layer, would be possible to give off in the case where being electrically excited and original
Carry out two different emission spectrum of functional layer, and this new EL transmittings think to come from it is organic thin in stratiform organic EL device
The transmitting of the exciplex (Exciplex) formed between film layer interface, this comes for intentionally getting the emission spectrum of luminescent layer
It says, is an extremely puzzled problem.And nearly all exciplex in other words interface emission spectrum all with applied voltage and
Variation has seriously affected the luminous stability of device.
Invention content
In view of the defects and deficiencies of the prior art, the present invention intends to provide a kind of simple in structure, reasonable design makes
With convenient high performance electroluminescent organic device, it solves the problems, such as it is to improve exciton quantity in luminescent layer, improves luminescent layer
Interior electron amount, and then the balanced degree for improving electrons and holes solves simultaneously to provide the light emission luminance and efficiency of device
The problem of interface Exciplex emission, obtains shining for stable luminescent material/system.
To achieve the above object, the technical solution adopted by the present invention is：It include transparent substrates, anode, organic function layer,
Cathode, power supply；The upper end of the transparent substrates is connected with anode, and the upper end right half part of anode is connected with organic function layer,
The upper end of organic function layer is connected with cathode, and the left end of cathode is connected with power supply, and the other end of power supply is connected on anode；Its
In, the organic function layer is by hole transmission layer, exciton blocking separating layer, luminescent layer；It is sequentially distributed from the bottom up as hole
Transport layer, exciton blocking separating layer and luminescent layer.
Preferably, increasing between the anode and hole transmission layer has hole injection layer, other structures and connection are closed
It is constant.
Preferably, increasing between the cathode and luminescent layer has electron transfer layer, other structures and connection relation are not
Become.
Preferably, increasing between the anode and hole transmission layer has hole injection layer, and in cathode and luminescent layer
Between increase have electron transfer layer, other structures and connection relation constant.
Preferably, increasing between the electron transfer layer and cathode has electron injecting layer, other structures and connection are closed
It is constant.
Preferably, increasing between the luminescent layer and electron transfer layer has hole blocking layer, other structures and connection
Relationship is constant.
With the above structure, the present invention has the beneficial effect that：A kind of high performance electroluminescent organic device of the present invention
Part, introducing exciton blocking separating layer in organic electroluminescence device structure can between hole transmission layer and luminescent layer
Decayed with effectively to stop exciton in luminescent layer and shone, to improve luminous efficiency, while using in exciton blocking separating layer
Exciton dissociation material can inhibit Exciplex emission, obtain the luminous new method of stable luminescent layer.Meanwhile it being detached
Electronics be again introduced into luminescent layer with the hole-recombination in layer the light emission luminance that device is thus improved at exciton and the effect that shines
Rate.The method that the industry that compares commonly improves electron injection from cathode, the side of the electron amount of raising luminescent layer of the invention
Method is very novel.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
With obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of the present invention.
Fig. 2 is one structural schematic diagram of specific embodiments of the present invention.
Fig. 3 is two structural schematic diagram of specific embodiments of the present invention.
Fig. 4 is three structural schematic diagram of specific embodiments of the present invention.
Fig. 5 is four structural schematic diagram of specific embodiments of the present invention.
Fig. 6 is five structural schematic diagram of specific embodiments of the present invention.
Reference sign：
Specific implementation mode
Below in conjunction with the accompanying drawings, the present invention is further illustrated.
Specific embodiment one：
Referring to as shown in Figure 1, present embodiment adopts the following technical scheme that：It includes transparent substrates 1, anode 2, has
Machine functional layer 3, cathode 4, power supply 5；The upper end of the transparent substrates 1 is connected with anode 2, and the upper end right half part of anode 2 connects
Be connected to organic function layer 3, the upper end of organic function layer 3 is connected with cathode 4, and the left end of cathode 4 is connected with power supply 5, power supply 5 it is another
One end is connected on anode 2；Wherein, the organic function layer 3 by hole transmission layer 31, exciton blocking separating layer 32, shine
Layer 33；It is sequentially distributed from the bottom up as hole transmission layer 31, exciton blocking separating layer 32 and luminescent layer 33.
The transparent substrates 1 can be glass, flexible substrate, sheet metal etc., and wherein flexible substrate can be polyester
Class or poly- phthalimide class compound etc.；The anode 2 can be metal-oxide film or metallic film, the metal oxide
Film can be ito thin film or zinc-oxide film or zinc tin oxide film, which can be the work contents such as gold, copper, silver
The higher metallic film of number；The anode 2 can also be 3,4- ethylenedioxy thiophene mixing poly styrene sulfonates (PEDOT:
) or polyaniline (PANI) class organic conductive polymer PSS；The cathode 4 includes buffer layer and metal layer, the cushioning layer material
It is inorganic molecules compound or the organic compound with high unoccupied energy level (LUMO), such as LiF or CsF, institute
It is metallic film or alloy firm to state metal layer material, which can be the work contents such as lithium or magnesium or calcium or strontium or aluminium or indium
The lower metallic film of number or the alloy firm of they and copper or gold or silver etc..
32 material therefor of exciton blocking separating layer is the material and exciton dissociation function for having exciton blocking function
Material mixing and doping composition, exciton-blocking material can be 1,10- phenanthrolines derivative (BCP), diphenyl -1 4,7_,
10- phenanthroline (BPhen), exciton dissociation material used in exciton blocking separating layer 32 can be fullerene (C60), can also be
The derivative of C60.
31 material therefor of hole transmission layer can be aromatic diamines compound or star triphenyl amine compound；
Luminescent layer can be a kind of luminous organic material or a variety of organic material doping systems composition, and the luminous organic material can be with
It is fluorescence luminescent material or phosphorescent light-emitting materials.
Present embodiment operation principle：The exciton blocking separating layer 32 is between hole transmission layer 31 and luminescent layer
33 interface is made of the organic material with exciton blocking function and the organic material doping with exciton dissociation effect.
Exciton in luminescent layer 33 can be effectively blocked in luminescent layer by the exciton blocking functional material in exciton blocking separating layer 32
In 33, and then improve the light emission luminance and efficiency of luminescent layer 33；Exciton dissociation function material in exciton blocking separating layer 31 simultaneously
The exciton dissociation that material can be formed 33 interface of luminescent layer avoids interface exciton relaxation and produces at individual electrons and holes
Raw light emitting, to avoid interface Exciplex emission phenomenon, while electronics will be again introduced into luminescent layer 33, with
Hole in it meets and generates exciton, exciton relaxation and generate light emitting, to improve device light emission luminance and shine effect
Rate.
Specific embodiment two：
Referring to as shown in Fig. 2, present embodiment adopts the following technical scheme that：The anode 2 and hole transmission layer
Increasing between 31 has hole injection layer 34, other structures and connection relation constant.
34 material therefor of hole injection layer can be phthalocyanine bronze (CuPc), TiOPc (TiOPc), 4,4', 4 "-
Three (N-3- methylphenyl-N-phenyls amino) triphenylamines (M-MTDATA), 4,4'-N, N'-, bis- carbazyl biphenyl (CBP), also may be used
To be made of with the doping system with hole injection efficiency material the green series of phthalein.
Specific embodiment three：
Referring to as shown in figure 3, present embodiment adopts the following technical scheme that：The cathode 4 and luminescent layer 33 it
Between increase have electron transfer layer 35, other structures and connection relation constant.
35 material therefor of electron transfer layer can be metal complex, oxadiazole electron-like transmission materials or imidazoles electricity
Sub- transmission material.
Specific embodiment four：
Referring to as shown in figure 4, present embodiment adopts the following technical scheme that：The anode 2 and hole transmission layer
Increasing between 31 has a hole injection layer 34, and increases between cathode 4 and luminescent layer 33 and have electron transfer layer 35, other structures and
Connection relation is constant.
Specific embodiment five：
Referring to as shown in figure 5, present embodiment adopts the following technical scheme that：The electron transfer layer 35 and cathode
Increasing between 4 has electron injecting layer 36, other structures and connection relation constant.
36 material therefor of electron injecting layer can be metal complex, oxadiazole electron-like transmission materials or miaow
Azole electron transport material.
Specific embodiment six：
Referring to as shown in fig. 6, present embodiment adopts the following technical scheme that：The luminescent layer 33 and electron-transport
Increasing between layer 35 has hole blocking layer 37, other structures and connection relation constant.
37 material therefor of hole blocking layer can be 1,10- phenanthrolines derivative (BCP), two (2- methyl -8-
Quinoline acid group closes) tri-phenyl-silane aluminium alcoholates (III), two (conjunction of 2- methyl -8- quinoline acid groups) 4- phenol aluminium (III) or two (2- first
One or more of base -8- quinoline acid groups close) 4- phenylphenols aluminium (III).
The above is merely illustrative of the technical solution of the present invention and unrestricted, and those of ordinary skill in the art are to this hair
The other modifications or equivalent replacement that bright technical solution is made, as long as it does not depart from the spirit and scope of the technical scheme of the present invention,
It is intended to be within the scope of the claims of the invention.
Claims (7)
1. a kind of high performance electroluminescent organic device, it is characterised in that：It includes transparent substrates (1), anode (2), You Jigong
Ergosphere (3), cathode (4), power supply (5)；The upper end of the transparent substrates (1) is connected with anode (2), and the upper end of anode (2) is right
Half part is connected with organic function layer (3), and the upper end of organic function layer (3) is connected with cathode (4), the left end connection of cathode (4)
There are power supply (5), the other end of power supply (5) to be connected on anode (2)；Wherein, the organic function layer (3) is by hole transmission layer
(31), exciton blocking separating layer (32), luminescent layer (33)；Be sequentially distributed from the bottom up for hole transmission layer (31, exciton blocking point
Absciss layer (32) and luminescent layer (33).
2. a kind of high performance electroluminescent organic device according to claim 1, it is characterised in that：The exciton blocking
Separating layer (32) is between the interface of hole transmission layer (31) and luminescent layer (33), by the organic material with exciton blocking function
Composition is adulterated with the organic material with exciton dissociation effect.The inner exciton blocking functional material energy of exciton blocking separating layer (32)
It is enough that exciton in luminescent layer (33) is effectively blocked in luminescent layer (33), so improve luminescent layer (33) light emission luminance and
Efficiency；What the inner exciton dissociation functional material of exciton blocking separating layer (31) can be formed luminescent layer (33) interface simultaneously swashs
Son is separated into individual electrons and holes, avoids interface exciton relaxation and the light emitting that generates, to avoid interface
Exciplex emission phenomenon, while electronics will be again introduced into luminescent layer (33), meet with the hole in it and generate exciton, swash
Son decays and generates light emitting, to improve the light emission luminance and luminous efficiency of device.
3. a kind of high performance electroluminescent organic device according to claim 1, it is characterised in that：The anode (2)
Increasing between hole transmission layer (31) has hole injection layer (34), other structures and connection relation constant.
4. a kind of high performance electroluminescent organic device according to claim 1, it is characterised in that：The cathode (4)
Increasing between luminescent layer (33) has electron transfer layer (35), other structures and connection relation constant.
5. a kind of high performance electroluminescent organic device according to claim 1, it is characterised in that：The anode (2)
Increasing between hole transmission layer (31) has hole injection layer (34), and increase has electricity between cathode (4) and luminescent layer (33)
Sub- transport layer (35), other structures and connection relation are constant.
6. a kind of high performance electroluminescent organic device according to claim 4, it is characterised in that：The electron-transport
Increasing between layer (35) and cathode (4) has electron injecting layer (36), other structures and connection relation constant.
7. a kind of high performance electroluminescent organic device according to claim 5, it is characterised in that：The luminescent layer
(33) increasing between electron transfer layer (35) has hole blocking layer (37), other structures and connection relation constant.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710483247.7A CN108666430A (en) | 2017-06-23 | 2017-06-23 | A kind of high performance electroluminescent organic device |
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| CN201710483247.7A CN108666430A (en) | 2017-06-23 | 2017-06-23 | A kind of high performance electroluminescent organic device |
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| CN110148677A (en) * | 2019-06-05 | 2019-08-20 | 京东方科技集团股份有限公司 | A kind of organic electroluminescence device, display panel and display device |
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