CN103922995B - A kind of organic electroluminescence device and display device - Google Patents
A kind of organic electroluminescence device and display device Download PDFInfo
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- CN103922995B CN103922995B CN201410138967.6A CN201410138967A CN103922995B CN 103922995 B CN103922995 B CN 103922995B CN 201410138967 A CN201410138967 A CN 201410138967A CN 103922995 B CN103922995 B CN 103922995B
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- 238000005401 electroluminescence Methods 0.000 title claims abstract description 97
- 239000000463 material Substances 0.000 claims abstract description 196
- 239000002019 doping agent Substances 0.000 claims abstract description 62
- -1 4,6- difluorophenyl Chemical group 0.000 claims description 20
- 150000001875 compounds Chemical class 0.000 claims description 18
- 229910052741 iridium Inorganic materials 0.000 claims description 16
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 16
- SIOXPEMLGUPBBT-UHFFFAOYSA-N picolinic acid Chemical compound OC(=O)C1=CC=CC=N1 SIOXPEMLGUPBBT-UHFFFAOYSA-N 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 125000006617 triphenylamine group Chemical class 0.000 claims 3
- FJWYGZDIGYICOD-UHFFFAOYSA-N 2-(2,4-difluorophenyl)-1h-pyrrole Chemical class FC1=CC(F)=CC=C1C1=CC=CN1 FJWYGZDIGYICOD-UHFFFAOYSA-N 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 25
- 238000004770 highest occupied molecular orbital Methods 0.000 abstract description 14
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 abstract description 12
- 230000005611 electricity Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000036299 sexual function Effects 0.000 abstract description 4
- AWXGSYPUMWKTBR-UHFFFAOYSA-N 4-carbazol-9-yl-n,n-bis(4-carbazol-9-ylphenyl)aniline Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(N(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=C1 AWXGSYPUMWKTBR-UHFFFAOYSA-N 0.000 description 21
- 101000837344 Homo sapiens T-cell leukemia translocation-altered gene protein Proteins 0.000 description 21
- 102100028692 T-cell leukemia translocation-altered gene protein Human genes 0.000 description 21
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 19
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 14
- 125000004169 (C1-C6) alkyl group Chemical group 0.000 description 12
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 11
- ODHXBMXNKOYIBV-UHFFFAOYSA-N triphenylamine Chemical class C1=CC=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 ODHXBMXNKOYIBV-UHFFFAOYSA-N 0.000 description 9
- JUJWROOIHBZHMG-UHFFFAOYSA-N pyridine Substances C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 8
- 230000027756 respiratory electron transport chain Effects 0.000 description 8
- 125000003375 sulfoxide group Chemical group 0.000 description 8
- 125000004433 nitrogen atom Chemical group N* 0.000 description 7
- DHDHJYNTEFLIHY-UHFFFAOYSA-N 4,7-diphenyl-1,10-phenanthroline Chemical compound C1=CC=CC=C1C1=CC=NC2=C1C=CC1=C(C=3C=CC=CC=3)C=CN=C21 DHDHJYNTEFLIHY-UHFFFAOYSA-N 0.000 description 6
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 6
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 6
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 5
- 125000004429 atom Chemical group 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 125000004432 carbon atom Chemical group C* 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 4
- 125000003118 aryl group Chemical group 0.000 description 4
- 235000010290 biphenyl Nutrition 0.000 description 4
- 238000000295 emission spectrum Methods 0.000 description 4
- 125000000623 heterocyclic group Chemical group 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000000862 absorption spectrum Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- UEMGWPRHOOEKTA-UHFFFAOYSA-N 1,3-difluorobenzene Chemical compound FC1=CC=CC(F)=C1 UEMGWPRHOOEKTA-UHFFFAOYSA-N 0.000 description 2
- RZTDESRVPFKCBH-UHFFFAOYSA-N 1-methyl-4-(4-methylphenyl)benzene Chemical group C1=CC(C)=CC=C1C1=CC=C(C)C=C1 RZTDESRVPFKCBH-UHFFFAOYSA-N 0.000 description 2
- VQGHOUODWALEFC-UHFFFAOYSA-N 2-phenylpyridine Chemical compound C1=CC=CC=C1C1=CC=CC=N1 VQGHOUODWALEFC-UHFFFAOYSA-N 0.000 description 2
- 150000005360 2-phenylpyridines Chemical class 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004305 biphenyl Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000004776 molecular orbital Methods 0.000 description 2
- 238000010606 normalization Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- FJXNABNMUQXOHX-UHFFFAOYSA-N 4-(9h-carbazol-1-yl)-n,n-bis[4-(9h-carbazol-1-yl)phenyl]aniline Chemical compound C12=CC=CC=C2NC2=C1C=CC=C2C(C=C1)=CC=C1N(C=1C=CC(=CC=1)C=1C=2NC3=CC=CC=C3C=2C=CC=1)C(C=C1)=CC=C1C1=C2NC3=CC=CC=C3C2=CC=C1 FJXNABNMUQXOHX-UHFFFAOYSA-N 0.000 description 1
- 239000005725 8-Hydroxyquinoline Substances 0.000 description 1
- BKQXUNGELBDWLS-UHFFFAOYSA-N 9,9-diphenylfluorene Chemical compound C1=CC=CC=C1C1(C=2C=CC=CC=2)C2=CC=CC=C2C2=CC=CC=C21 BKQXUNGELBDWLS-UHFFFAOYSA-N 0.000 description 1
- SBTLWIFCEXTZRJ-UHFFFAOYSA-N 9-[4-[4-(benzenesulfonyl)-2-methylphenyl]-3-methylphenyl]carbazole Chemical compound CC1=CC(=CC=C1C1=CC=C(C=C1C)S(=O)(=O)C1=CC=CC=C1)N1C2=C(C=CC=C2)C2=C1C=CC=C2 SBTLWIFCEXTZRJ-UHFFFAOYSA-N 0.000 description 1
- ROFVEXUMMXZLPA-UHFFFAOYSA-N Bipyridyl Chemical group N1=CC=CC=C1C1=CC=CC=N1 ROFVEXUMMXZLPA-UHFFFAOYSA-N 0.000 description 1
- 238000004057 DFT-B3LYP calculation Methods 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241001062009 Indigofera Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 229960003540 oxyquinoline Drugs 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005424 photoluminescence Methods 0.000 description 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 125000000475 sulfinyl group Chemical group [*:2]S([*:1])=O 0.000 description 1
- JLAVCPKULITDHO-UHFFFAOYSA-N tetraphenylsilane Chemical compound C1=CC=CC=C1[Si](C=1C=CC=CC=1)(C=1C=CC=CC=1)C1=CC=CC=C1 JLAVCPKULITDHO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
- C07D209/82—Carbazoles; Hydrogenated carbazoles
- C07D209/86—Carbazoles; Hydrogenated carbazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the ring system
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/081—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/40—Organosilicon compounds, e.g. TIPS pentacene
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
- H10K85/6572—Polycyclic condensed heteroaromatic hydrocarbons comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/30—Coordination compounds
- H10K85/341—Transition metal complexes, e.g. Ru(II)polypyridine complexes
- H10K85/342—Transition metal complexes, e.g. Ru(II)polypyridine complexes comprising iridium
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The present invention relates to electroluminescent technology fields, disclose a kind of organic electroluminescence device and a kind of display device, the organic electroluminescence device includes organic luminous layer, the organic luminous layer includes at least one layer of host-guest dopant material, wherein the molecular structure of the material of main part of the one or more layers host-guest dopant material is：The non-conjugated empty resistance electron transporting groups of cavity transmission group, the highest occupied molecular orbital of the host material molecules and the energy level difference of lowest unoccupied molecular orbital are not less than 5.2eV, and the energy level difference of triplet and singlet energy level is not less than 2.8eV.The material of main part of the present invention is with the bipolar sexual function for passing hole and the son that conducts electricity, so electronics and hole just can obtain active balance in the material of main part of luminescent layer, exciton transfer can be formed to guest materials, then photon is released, it can effectively shine, improve the performance of organic electroluminescence device.
Description
Technical field
The present invention relates to electroluminescent technology field more particularly to a kind of organic electroluminescence device and a kind of display dresses
It puts.
Background technology
Organic electroluminescence device（Organic Light Emitting Display, abbreviation OLED）It is put down as new
Panel display and liquid crystal display（Liquid Crystal Display, abbreviation LCD）It compares, there is thin, light, wide viewing angle, master
It is dynamic shine, luminescent color is continuously adjustable, at low cost, fast response time, energy consumption is small, driving voltage is low, operating temperature range is wide, raw
Production. art is simple, luminous efficiency is high and can Flexible Displays the advantages that.OLED is just because of incomparable with other displays
Advantage and fine application prospect have obtained the very big concern of industrial circle and scientific circles.
Existing organic electroluminescence device includes the cathode, electron transfer layer, the organic luminous layer that are arranged in order
（Emitting Layer, abbreviation EML）, hole transmission layer, anode and substrate.The raising of organic electroluminescence device efficiency, it is main
If improve the formation probability of exciton as far as possible in organic luminous layer.And in organic electroluminescence device, hole transmission layer material
The hole mobility of material is higher by 1 to 2 orders of magnitude than the electron mobility of electron transport layer materials, so as to cause organic light emission
Electronics and the imbalance of hole injection, are unfavorable for the formation of exciton in layer, in turn result in the efficiency rolling of organic electroluminescence device
Drop（Roll-off）It is extremely serious, the serious deterioration performance of device.
The content of the invention
The embodiment of the present invention provides a kind of organic electroluminescence device and a kind of display device, to solve in the prior art
There are problems that the serious efficiency roll-off of organic electroluminescence device.
The embodiment of the present invention provides a kind of organic electroluminescence device first, and the organic electroluminescence device includes organic
Luminescent layer, the organic luminous layer includes at least one layer of host-guest dopant material, wherein the one or more layers main body
The molecular structure of the material of main part of object dopant material is：Cavity transmission group-non-conjugated empty resistance-electron transporting groups, it is described
The highest occupied molecular orbital of host material molecules（Highest Occupied Molecular Orbital, abbreviation HOMO）With
Lowest unoccupied molecular orbital（Lowest Unoccupied Molecular Orbital, abbreviation LOMO）Energy level difference be not less than
5.2eV, and triplet（T1）With singlet energy level（S0）Energy level difference be not less than 2.8eV.
It in order to solve the problems, such as the efficiency roll-off of OLED device, must just cause the hole in EML and electronic equilibrium, reduce
Exciton quenching under high current density, the present invention carry out rational MOLECULE DESIGN, selection by the material of main part to luminescent layer
Cavity transmission group-material of main part of the non-conjugated empty resistance-electron transporting groups as luminescent layer, this material of main part is with biography
Hole and the bipolar sexual function for the son that conducts electricity, then electronics and hole just can effectively be put down in the material of main part of luminescent layer
Weighing apparatus can form exciton transfer to guest materials, then release photon, can effectively shine, improve organic electroluminescence device
Performance.Selection for material of main part will consider it with high triplet energy level T1, to prevent energy from turning round, this implementation
The energy level difference of the molecule triplet of material of main part and singlet energy level is not less than 2.8eV in example；It also needs to consider main body material
The molecule HOMO energy levels and lumo energy of material will can match OLED device, and the molecule highest of material of main part occupies in the present embodiment
The energy level difference of molecular orbit and lowest unoccupied molecular orbital is not less than 5.2eV；In addition, the emission spectrum of material of main part is wanted and object
Absorption spectrum have a higher overlapping, such energy transmission ratio more thoroughly, external quantum efficiency（External quantum
Efficiency, abbreviation EQE）Compare high.
Preferably, the material of main part is represented using any bipolarity compound in general formula I~general formula V：
Wherein, R1Represent cavity transmission group, R2Represent electron transporting groups, the highest of the bipolarity compound molecule
Occupied molecular orbital is distributed in R1On group, lowest unoccupied molecular orbital is distributed in R2On group.
Preferably, R1For substituted or unsubstituted carbazyl or R1For substituted or unsubstituted triphenylamine base；R2To contain
The aryl of sulfuryl contains sulfuryl heterocycle, the aryl containing sulfoxide group or the heterocycle containing sulfoxide group.
Preferably, R1It is represented using general formula VI or general formula VII：
Wherein, in general formula VI, when the nitrogen-atoms of general formula VI is connected with phenyl any in general formula I~general formula V, R3
And R4Independently selected from hydrogen atom, carbazyl, phenyl or C1-C6 alkyl, cancel group R5；As the carbon atom of general formula VI and general formula I
When any phenyl is connected in~general formula V, R5For C1-C6 alkyl, R3And R4Independently selected from hydrogen atom, carbazyl, phenyl or
C1-C6 alkyl；
In general formula VII, R3Independently selected from hydrogen atom, carbazyl, phenyl or C1-C6 alkyl.
Preferably, R2It is represented using general formula VIII or general formula IX：
Wherein, in general formula VIII, X is sulfuryl or sulfoxide group, sulphur atom and the general formula I~general formula V of sulfuryl or sulfoxide group
In any phenyl connection；N is 0,1 or 2；Y is carbon atom or nitrogen-atoms；R6It is former for hydrogen atom, C1-C6 alkyl or halogen
Son；
In general formula IX, R6Independently selected from hydrogen atom, C1-C6 alkyl or halogen atom.
Preferably, the bipolarity compound is selected from least one following shown compounds：
Preferably, the organic luminous layer includes two layers of host-guest dopant material, is respectively the doping of the first host-guest
Material and the second host-guest dopant material；
The material of main part of the first host-guest dopant material be 4,4 ', 4 ' '-three (N- carbazyls) triphenylamine, object
Material is that double (4,6- difluorophenyl pyridinatos-N, C2) pyridinecarboxylics close iridium；The main body material of the second host-guest dopant material
Expect for general formula I~general formula V it is any shown in bipolarity compound, guest materials is double (4,6- difluorophenyl pyridinato-N, C2) pyrroles
Pyridine formyl closes iridium.
Preferably, the organic luminous layer includes three layer main body object dopant materials, is respectively the doping of the 3rd host-guest
Material, the 4th host-guest dopant material and the 5th host-guest dopant material, wherein, the 4th host-guest dopant material
Between the 3rd host-guest dopant material and the 5th host-guest dopant material；
The material of main part of the 3rd host-guest dopant material be 4,4 ', 4 ' '-three (N- carbazyls) triphenylamine, object
Material is that double (4,6- difluorophenyl pyridinatos-N, C2) pyridinecarboxylics close iridium；The main body material of the 4th host-guest dopant material
Expect for the bipolarity compound and 4 shown in general formula I, 4 ', 4 ' '-three (N- carbazyls) triphenylamine, guest materials is double (4,6- bis-
Fluorobenzene yl pyridines-N, C2) pyridinecarboxylic conjunction iridium；The material of main part of the 5th host-guest dopant material is general formula I~general formula V
Bipolarity compound shown in any, guest materials are that double (4,6- difluorophenyl pyridinato-N, C2) pyridinecarboxylics close iridium.
Preferably, the highest occupied molecular orbital of the host material molecules and the energy level difference of lowest unoccupied molecular orbital are
5.2eV to 6.5eV.
The embodiment of the present invention also provides a kind of display device, and the display device includes any of the above-described kind of organic electroluminescent
Device.
In the display device of the present invention, due to using any of the above-described kind of organic electroluminescence device, display dress
The electronics put and hole just can obtain active balance in the material of main part of luminescent layer, can form exciton transfer to object
Then material releases photon, can effectively shine, and improves the performance of organic electroluminescence device, and then improves display device
Performance.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for this
For the those of ordinary skill in field, without having to pay creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is the structure diagram of the organic electroluminescence device in one embodiment of the invention；
Fig. 2 is the current density and voltage curve of organic electroluminescence device A1 to A3；
Brightness and the voltage curve that Fig. 3 is organic electroluminescence device A1 to A3；
The external quantum efficiency and brightness curve figure that Fig. 4 is organic electroluminescence device A1 to A3；
The current efficiency and current density plot figure that Fig. 5 is organic electroluminescence device A1 to A3；
Fig. 6 is the current density and voltage curve of organic electroluminescence device B1 and B2；
Fig. 7 is the normalization electroluminescent light spectrogram of organic electroluminescence device B1 and B2；
Fig. 8 is the external quantum efficiency of organic electroluminescence device B1 and B2 and brightness curve figure；
Fig. 9 is the current efficiency of organic electroluminescence device B1 and B2 and current density plot figure.
Specific embodiment
In order to make the object, technical solutions and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing into
It is described in detail to one step, it is clear that described embodiment is only the implementation of part of the embodiment of the present invention rather than whole
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
All other embodiment, belongs to the scope of protection of the invention.
The embodiment of the present invention provides a kind of organic electroluminescence device first, and the organic electroluminescence device includes organic
Luminescent layer, the organic luminous layer includes at least one layer of host-guest dopant material, wherein the one or more layers main body
The molecular structure of the material of main part of object dopant material is：Cavity transmission group-non-conjugated empty resistance-electron transporting groups, it is described
The highest occupied molecular orbital of host material molecules（Highest Occupied Molecular Orbital, abbreviation HOMO）With
Lowest unoccupied molecular orbital（Lowest Unoccupied Molecular Orbital, abbreviation LOMO）Energy level difference be not less than
5.2eV, and triplet（T1）With singlet energy level（S0）Energy level difference be not less than 2.8eV.
It in order to solve the problems, such as the efficiency roll-off of OLED device, must just cause the hole in EML and electronic equilibrium, reduce
Exciton quenching under high current density, the present invention carry out rational MOLECULE DESIGN, selection by the material of main part to luminescent layer
Cavity transmission group-material of main part of the non-conjugated empty resistance-electron transporting groups as luminescent layer, this material of main part is with biography
Hole and the bipolar sexual function for the son that conducts electricity, then electronics and hole just can effectively be put down in the material of main part of luminescent layer
Weighing apparatus can form exciton transfer to guest materials, then release photon, can effectively shine, improve organic electroluminescence device
Performance.Selection for material of main part will consider it with high triplet energy level T1, to prevent energy from turning round, this implementation
The energy level difference of the molecule triplet of material of main part and singlet energy level is not less than 2.8eV in example；It also needs to consider main body material
The molecule HOMO energy levels and lumo energy of material will can match OLED device, and the molecule highest of material of main part occupies in the present embodiment
The energy level difference of molecular orbit and lowest unoccupied molecular orbital is not less than 5.2eV；In addition, the emission spectrum of material of main part is wanted and object
Absorption spectrum have a higher overlapping, such energy transmission ratio more thoroughly, external quantum efficiency（External quantum
Efficiency, abbreviation EQE）Compare high.
In the molecular structure of aforementioned body material（Cavity transmission group-non-conjugated empty resistance-electron transporting groups）In, wherein
Non-conjugated empty resistance can be used it is any in following two structures：A kind of structure is by two five-ring heterocycles, hexa-member heterocycle or benzene
Ring is connected directly the non-conjugated empty resistance to be formed, and two atoms to interlink at this time are the structures of sp2 hydridization；Another structure is
Sp3 hydridization is formed around central atom（Form tetrahedron）Non-conjugated empty resistance, central atom can be carbon atom（C）Or silicon
Atom（Si）.
Above-mentioned non-conjugated empty resistance is further qualified, it is preferred that the material of main part, which is used in general formula I~general formula V, appoints
A kind of bipolarity compound represents：
Wherein, R1Represent cavity transmission group, R2Represent electron transporting groups, the highest of the bipolarity compound molecule
Occupied molecular orbital is distributed in R1On group, lowest unoccupied molecular orbital is distributed in R2On group.
In above-mentioned general formula I~general formula V, the non-conjugated empty resistance of general formula I is 4,4'- dimethyl diphenyls（4,4'-
Dimethylbiphenyl, referred to as mbp）, the non-conjugated empty resistance of general formula II is 2- phenylpyridines（2-Phenylpyridine,
Referred to as ppy）, the non-conjugated empty resistance of general formula III is 2,2 ' bipyridyls（2,2'-Dipyridyl, referred to as dpy）, general formula IV
Non-conjugated empty resistance be 9,9- diphenylfluorenes（9,9-Diphenylfluorene, referred to as dpf）, the non-conjugated empty resistance of general formula V
For tetraphenyl silane（SiPh4）.
It is since the methyl of two substitutions in biphenyl and the hydrogen of other phenyl ring are former as non-conjugated empty resistance to select mbp
The electronic effect that pushes away between son causes biphenyl mutually exclusive, 125 degree of bond angle is formed, effectively by cavity transmission group R1And electronics
Transport group R2Keep apart, ensured mobility（mobility）；
2- phenylpyridines are selected as lone electron and the other benzene that the reason for non-conjugated empty resistance is because of nitrogen-atoms on pyridine
The electronics of ring hydrogen atom is mutually exclusive, causes script planar structure and becomes distorted-structure, so as to transporting holes part
Cavity transmission group R1With the electron transporting groups R of transmission electronic section2Space obstacle forms non-conjugated structure；
2,2 ' bipyridyls selected as the reason for non-conjugated empty resistance be because on a pyridine lone electron of nitrogen-atoms with
The lone electron of nitrogen-atoms on another pyridine is mutually exclusive, causes script planar structure and becomes distorted-structure, so as to pass
The cavity transmission group R of defeated cavity portion1With the electron transporting groups R of transmission electronic section2Space obstacle forms non-conjugated knot
Structure；
Select dpf and SiPh4The reason for be central atom C and SiPh on dpf4Central atom Si to employ sp3 miscellaneous
Change, form tetrahedral structure, so as to the cavity transmission group R that will be linked1With electron transporting groups R2It is separated；
In addition, the non-conjugated empty resistance in general formula I~general formula V also has higher triplet so that ultimately forms double
Polarity material of main part also has very high T1Energy level could be given and the triplet excitons in OLED are passed to luminous object material
Material.
For the cavity transmission group R in general formula I~general formula V1With electron transporting groups R2, it is preferred that R1For substitution or not
Substituted carbazyl or R1For substituted or unsubstituted triphenylamine base；R2For the aryl containing sulfuryl, containing sulfuryl heterocycle, contain
There are the aryl of sulfoxide group or the heterocycle containing sulfoxide group.
Preferably, R1It is represented using general formula VI or general formula VII：
Wherein, in general formula VI, when the nitrogen-atoms of general formula VI is connected with phenyl any in general formula I~general formula V, R3
And R4Independently selected from hydrogen atom, carbazyl, phenyl or C1-C6 alkyl, cancel group R5；As the carbon atom of general formula VI and general formula I
When any phenyl is connected in~general formula V, R5For C1-C6 alkyl, R3And R4Independently selected from hydrogen atom, carbazyl, phenyl or
C1-C6 alkyl；
In general formula VII, R3Independently selected from hydrogen atom, carbazyl, phenyl or C1-C6 alkyl.
Preferably, R2It is represented using general formula VIII or general formula IX：
Wherein, in general formula VIII, X is sulfuryl or sulfoxide group, sulphur atom and the general formula I~general formula V of sulfuryl or sulfoxide group
In any phenyl connection；N is 0,1 or 2；Y is carbon atom or nitrogen-atoms；R6It is former for hydrogen atom, C1-C6 alkyl or halogen
Son；
In general formula IX, R6Independently selected from hydrogen atom, C1-C6 alkyl or halogen atom.
Preferably, the bipolarity compound is selected from least one following shown compounds：
Preferably, the organic luminous layer includes two layers of host-guest dopant material, is respectively the doping of the first host-guest
Material and the second host-guest dopant material；
The material of main part of the first host-guest dopant material be 4,4 ', 4 ' '-three (N- carbazyls) triphenylamine, object
Material is that double (4,6- difluorophenyl pyridinatos-N, C2) pyridinecarboxylics close iridium；The main body material of the second host-guest dopant material
Expect for general formula I~general formula V it is any shown in bipolarity compound, guest materials is double (4,6- difluorophenyl pyridinato-N, C2) pyrroles
Pyridine formyl closes iridium.
Preferably, the organic luminous layer includes three layer main body object dopant materials, is respectively the doping of the 3rd host-guest
Material, the 4th host-guest dopant material and the 5th host-guest dopant material, wherein, the 4th host-guest dopant material
Between the 3rd host-guest dopant material and the 5th host-guest dopant material；
The material of main part of the 3rd host-guest dopant material be 4,4 ', 4 ' '-three (N- carbazyls) triphenylamine, object
Material is that double (4,6- difluorophenyl pyridinatos-N, C2) pyridinecarboxylics close iridium；The main body material of the 4th host-guest dopant material
Expect for the bipolarity compound and 4 shown in general formula I, 4 ', 4 ' '-three (N- carbazyls) triphenylamine, guest materials is double (4,6- bis-
Fluorobenzene yl pyridines-N, C2) pyridinecarboxylic conjunction iridium；The material of main part of the 5th host-guest dopant material is general formula I~general formula V
Bipolarity compound shown in any, guest materials are that double (4,6- difluorophenyl pyridinato-N, C2) pyridinecarboxylics close iridium.
Preferably, the highest occupied molecular orbital of the host material molecules and the energy level difference of lowest unoccupied molecular orbital are small
In 5.2eV to 6.5eV.
When host material molecules highest occupied molecular orbital and lowest unoccupied molecular orbital energy level difference for 5.2eV extremely
It, can be with good match OLED device during 6.5eV.
In any of the above-described kind of organic electroluminescence device of the invention, organic electroluminescence device can be that top emitting is organic
Electroluminescent device, or bottom emitting organic electroluminescence device.As shown in Figure 1, Fig. 1 is in one embodiment of the invention
The structure diagram of organic electroluminescence device, shown organic electroluminescence device include the cathode 108, the electronics that are arranged in order
Implanted layer（Electron Injection Layer, abbreviation EIL）107th, electron transfer layer（Electron Transport
Layer, abbreviation ETL）106th, organic luminous layer 105, hole transmission layer（Hole Transport Layer, abbreviation HTL）104、
Hole injection layer（Hole InjectionLayer, abbreviation HIL）103 and anode 102, wherein organic luminous layer uses above-mentioned
The organic luminous layer of one embodiment, organic luminescent device can also include the underlay substrate 101 of carrying device.Wherein cathode 108
Material can be aluminium（Al）, the material of anode 102 is transparent conducting glass, such as tin indium oxide（ITO）, in addition, in ETL layers
It can also include hole blocking layer（Hole Blocking Layer, abbreviation HBL）.
The embodiment of the present invention also provides a kind of display device, and the display device includes any of the above-described kind of organic electroluminescent
Device.
In the display device of the present invention, due to using any of the above-described kind of organic electroluminescence device, display dress
The electronics put and hole just can obtain active balance in the material of main part of luminescent layer, can form exciton transfer to object
Then material releases photon, can effectively shine, and improves the performance of organic electroluminescence device, and then improves display device
Performance.
The display device can be：Oled panel, Electronic Paper, TV, Digital Frame, mobile phone, tablet computer etc. have
The product or component of any display function.
Preferred embodiment is exemplified below to illustrate the organic electroluminescence device of the present invention, but the present invention is not limited under
State embodiment.The making of following organic electroluminescence device is made of common process, is the organic electroluminescent of blue light emitting
Device.It continues referring to shown in Fig. 1, the structure of following organic electroluminescence device is：102/ hole injection layer of anode 103/ is empty
106/ electron transfer layer of cave transport layer 104/ organic luminous layer, 105/ electron injecting layer, 107/ cathode 108, can also include substrate
Substrate 101.Wherein, single-shot photosphere can be divided into according to the number of plies of organic luminous layer 105（Singlet Emissive Layer,
Abbreviation SEL）, double main body blue light-emittings（Double Host Blue Emitting Layer, abbreviation DHBEL）With three main bodys
Blue light-emitting（Triplet Host Blue Emitting Layer, abbreviation THBEL）.In following comparative examples and embodiment
In, organic electroluminescence device makes on transparent ito glass, and operating pressure is 5 × 10-6Support（Torr）, ITO as anode,
The square resistance of ITO is 40 Ω/sq..The effective area of the organic electroluminescence device of making about 9.0mm2, mainly by ITO and
Cathode（Using aluminium）Overlapping determine；The size of glass substrate is 40 × 40 × 0.75mm.
Comparative example 1
Organic electroluminescence device A1：
Using ITO as anode, 4,4', 4''- tri- (N- carbazyls) triphenylamine（4,4',4''-tri(N-carbazolyl)
Triphenylamine, abbreviation TCTA）As the material of hole transmission layer, TCTA also serves as the material of main part of organic luminous layer,
Double (4,6- difluorophenyl pyridinatos-N, C2) pyridinecarboxylics close iridium（FIrpic）Guest materials as organic luminous layer（For blue light
Dopant material）, 4,7- diphenyl -1,10- phenanthroline（4,7-diphenyl-1,10-phenanthroline, abbreviation BPhen）
As the material of electron transfer layer, lithium fluoride（LiF）For the material of electron injecting layer, aluminium（Al）For cathode, according to common process
Prepare organic electroluminescence device.The organic electroluminescence device A1 structures of preparation are：ITO/HIL(400/
TCTA/TCTA:FIrpic10wt%)/BPhen/LiF/Al,
In, 10wt% represents that guest materials FIrpic weight fractions in organic luminous layer are 10%,(angstrom）For thickness unit.
Comparative example 2
Organic electroluminescence device A2：
Using ITO as anode, materials of the TCTA as hole transmission layer, TCTA also serves as the material of main part of organic luminous layer,
Guest materials of the FIrpic as organic luminous layer（For blue light dopant material）, materials of the BPhen as electron transfer layer, LiF
For the material of electron injecting layer, Al is cathode, and organic electroluminescence device is prepared according to common process.The organic electroluminescence hair of preparation
Optical device A2 structures are：ITO /HIL/TCTA/TCTA:FIrpic(13wt%)/
BPhen/LiF/Al, wherein, 13wt% represents guest materials FIrpic in organic luminous layer
Middle weight fraction is 13%,（Angstrom）For thickness unit.
Embodiment 3
Organic electroluminescence device A3, organic luminous layer SEL：
Using ITO as anode, materials of the TCTA as hole transmission layer, 9- (2,2'- dimethyl -4'- phenyl sulfonyls) -
[1,1'- biphenyl] -4- bases) -9H- carbazoles（9-(2,2'-dimethyl-4'-(phenylsulfonyl)-[1,1'-bi-
Phenyl] -4-yl) -9H-carbazole, abbreviation DPBC）As the material of main part of organic luminous layer, FIrpic is as organic hair
The guest materials of photosphere（For blue light dopant material）, three (8-hydroxyquinoline) aluminium（Alq3）As the material of electron transfer layer, LiF
For the material of electron injecting layer, Al is cathode, and organic electroluminescence device is prepared according to common process.The organic electroluminescence hair of preparation
Optical device A3 structures are：ITO /HIL/TCTA/DPBC:FIrpic(10wt%)/
Alq3/LiF /AlWherein, 10wt% represents guest materials FIrpic in organic luminous layer
Weight fraction is 10%,（Angstrom）For thickness unit, DPBC is commercially available, and chemical structural formula is：
Embodiment 4
Organic electroluminescence device B1, organic luminous layer DHBEL：
Using ITO as anode, materials of the TCTA as hole transmission layer, the material of main part of the first host-guest dopant material is
TCTA, guest materials FIrpic, the material of main part of the second host-guest dopant material is the compound of formaldehyde and 9- (4'-
((4- chlorphenyls) sulfinyl) -2,2'- methyl-[1,1'- biphenyl] -4- bases) -9H- carbazoles（1:1）（formaldehyde
compound with9-(4'-((4-chlorophenyl)sulfinyl)-2,2'-dimethyl-[1,1'-biphenyl]-
4-yl)-9H-carbazole(1:1), abbreviation CSDBC）As the material of main part of organic luminous layer, guest materials FIrpic,
Wherein FIrpic be blue light dopant material, Alq3As the material of electron transfer layer, LiF is the material of electron injecting layer, and Al is
Cathode prepares organic electroluminescence device according to common process.The organic electroluminescence device B1 structures of preparation are：ITO/HIL /TCTA/TCTA:FIrpic(13wt%)/CSDBC:FIrpic(10wt%)/Alq3/LiF/AlWherein, 13wt% and 10wt% is respectively object material
Material weight fraction in the first host-guest dopant material and the second host-guest dopant material,（Angstrom）For thickness unit,
CSDBC is commercially available, and chemical structural formula is：
Embodiment 5
Organic electroluminescence device B2, organic luminous layer THBEL：
Using ITO as anode, materials of the TCTA as hole transmission layer, the material of main part of the 3rd host-guest dopant material is
TCTA, guest materials FIrpic, the material of main part of the 4th host-guest dopant material is TCTA and CSDBC, and guest materials is
FIrpic, the material of main part of the 5th host-guest dopant material is CSDBC, and guest materials FIrpic, wherein FIrpic are indigo plant
Photodoping material, Alq3As the material of electron transfer layer, LiF is the material of electron injecting layer, and Al is cathode, according to conventional work
Skill prepares organic electroluminescence device.The organic electroluminescence device B2 structures of preparation are：ITO/HIL/TCTA/TCTA:FIrpic(13wt%)/TCTA:CSDBC:FIrpic(
10wt%)/CSDBC:FIrpic(10wt%)/Alq3/LiF/Al, wherein,
13wt%, 10wt% and 10wt% be respectively guest materials the 3rd host-guest dopant material, the 4th host-guest dopant material and
Weight fraction in 5th host-guest dopant material, TCTA and CSDBC in the material of main part of the 4th host-guest dopant material
Weight fraction is respectively 45% and 45%,（Angstrom）For thickness unit.
Material of main part DPBC and CSDBC used, pass through Gauss in embodiment 3~5（Gaussian）Software uses
B3LYP（Becker’s Three Parameter Hybrid Functional）Functional is mixed, 6-31g (d) base groups obtain
The HOMO energy levels of DPBC are 5.42eV, and lumo energy 1.41eV, Eg energy level are 4.0eV, triplet T1For 3.16eV, hair
The main peak for penetrating spectrum is 333nm；The HOMO energy levels of CSDBC are 5.45eV, and lumo energy 1.62eV, Eg energy level are 3.83eV,
Triplet T1For 3.12eV, the main peak of emission spectrum is 340nm.Therefore, the triplet state energy of material of main part DPBC and CSDBC
Grade and guest materials can match, in addition, the emission spectrum of the absorption spectrum of guest materials and material of main part also has certain overlapping,
Therefore, aforementioned body material DPBC and CSDBC can be used as phosphorescent blue material of main part.
Using the IVL testers of Mc Science companies of South Korea to organic electroluminescence device A1's to A3 and B1 and B2
Device performance is detected, as a result as follows.
The comparison of the device property of organic electroluminescence device A1 to A3, as shown in Fig. 2, Fig. 2 is organic electroluminescence
The current density and voltage curve of part A1 to A3, it is seen then that current density（current density）With voltage（voltage）
Increase and increase, when driving voltage is in the range of 4.0V~5.5V, under identical driving voltage, organic electroluminescence device A3
Current density be higher than organic electroluminescence device A1 and A2 current density；As shown in figure 3, Fig. 3 is organic electroluminescence device A1
Brightness and voltage curve to A3, it is seen then that brightness（luminance）With voltage（voltage）Increase and increase, work as driving
When voltage is in the range of 4.0V~5.5V, under identical driving voltage, the brightness of organic electroluminescence device A3 is higher than organic electroluminescence
The brightness of device A1 and A2；As shown in figure 4, the external quantum efficiency and brightness that Fig. 4 is organic electroluminescence device A1 to A3 are bent
Line chart, it is seen then that in 0~1500cd/m of brightness2In the range of, the external quantum efficiency of organic electroluminescence device A3（External
Quantum Efficiency, abbreviation EQE）It is therefore, organic higher than the external quantum efficiency of organic electroluminescence device A1 and A2
Electroluminescent device A3 is more energy efficient under identical brightness；As shown in figure 5, Fig. 5 is the electricity of organic electroluminescence device A1 to A3
Efficiency and current density plot figure are flowed, in current density（current density）In 5mA/cm2In the range of when, organic electroluminescence
Luminescent device A3 has higher current efficiency（Yield）.By above-mentioned comparison, by using with biography hole and biography
The material of main part of the bipolar sexual function of electronics promotes the electron mobility in organic electroluminescence device A3, balances and is carried in OLED
Stream is horizontal so that organic electroluminescence device A3 has better electro-optical properties.
The comparison of the device property of organic electroluminescence device B1 and B2, as shown in fig. 6, Fig. 6 is organic electroluminescence
The current density and voltage curve of part B1 and B2, it is seen then that current density（current density）With voltage（voltage）
Increase and increase, when driving voltage be more than 4.0V when, under identical driving voltage, the current density of organic electroluminescence device B1
Higher than the current density of organic electroluminescence device B2；As shown in fig. 7, Fig. 7 is the normalization electricity of organic electroluminescence device B1 and B2
Photoluminescence spectrogram, it is seen then that the transmitting main peak of organic electroluminescence device B1 and B2 can supply guest materials in 500nm, make
Its blue light emitting；As shown in figure 8, Fig. 8 is the external quantum efficiency of organic electroluminescence device B1 and B2 and brightness curve figure, it can
See, the external quantum efficiency of organic electroluminescence device B2（EQE）It is therefore, organic higher than the EQE of organic electroluminescence device B1
Electroluminescent device B2 is in identical brightness（luminance）Under it is more energy efficient compared with organic electroluminescence device B1, pass through Fig. 4
Comparison with Fig. 8 understands that under identical brightness, organic electroluminescence device B1 and B2 is compared with organic electroluminescence device A3
It is more energy efficient with higher EQE；As shown in figure 9, Fig. 9 is close for the current efficiency and electric current of organic electroluminescence device B1 and B2
It writes music line chart, it is seen then that in identical current density（current density）When, organic electroluminescence device B1 has higher
Current efficiency（Yield）, pass through the comparison of Fig. 5 and Fig. 9, under identical current density, organic electroluminescence device
B1 and B2 has higher current efficiency compared with organic electroluminescence device A3.Pass through above-mentioned comparison, organic electroluminescence hair
Optical device B1 has better electro-optical properties compared with organic electroluminescence device B2, and organic electroluminescence device B1 and B2 is opposite
There are better electro-optical properties in organic electroluminescence device A3, organic electroluminescence device B1, B2 and A3 are compared with Organic Electricity
Electroluminescence device A1 and A2 have better electro-optical properties.This is because using with the bipolarity work(for passing hole and the son that conducts electricity
Organic light emission layer structure of the material of main part of energy as multi-layer doping so that the energy level collocation of Organic Light Emitting Diode OLED is more
Rationally, the exciton after compound effectively excites on guest materials to shine, and improves the external quantum efficiency of device.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make these embodiments other change and modification.So appended claims be intended to be construed to include it is excellent
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and scope.In this way, if these modifications and changes of the present invention belongs to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these modification and variations.
Claims (3)
1. a kind of organic electroluminescence device, which is characterized in that the organic luminous layer includes two layers of host-guest dopant material,
Respectively the first host-guest dopant material and the second host-guest dopant material；
The material of main part of the first host-guest dopant material is 4,4 ', 4 "-three (N- carbazyls) triphenylamines, and guest materials is
Double (4,6- difluorophenyl pyridinatos-N, C2) pyridinecarboxylics close iridium；The material of main part of the second host-guest dopant material be with
Under any bipolarity compound, guest materials is that double (4,6- difluorophenyl pyridinato-N, C2) pyridinecarboxylics close iridium,
2. a kind of organic electroluminescence device, which is characterized in that the organic luminous layer includes three layer main body object dopant materials,
Respectively the 3rd host-guest dopant material, the 4th host-guest dopant material and the 5th host-guest dopant material, wherein, institute
It states the 4th host-guest dopant material and is located at the 3rd host-guest dopant material and the 5th host-guest dopant material
Between；
The material of main part of the 3rd host-guest dopant material is 4,4 ', 4 "-three (N- carbazyls) triphenylamines, and guest materials is
Double (4,6- difluorophenyl pyridinatos-N, C2) pyridinecarboxylics close iridium；The material of main part of the 4th host-guest dopant material is logical
Bipolarity compound and 4 shown in Formulas I, 4 ', 4 "-three (N- carbazyls) triphenylamines, guest materials are double (4,6- difluorophenyl pyrroles
Pyridine-N, C2) pyridinecarboxylic conjunction iridium；The material of main part of the 5th host-guest dopant material is following any bipolarity chemical combination
Object, guest materials are that double (4,6- difluorophenyl pyridinato-N, C2) pyridinecarboxylics close iridium,
3. a kind of display device, which is characterized in that including such as claim 1~2 any one of them organic electroluminescence device.
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| CN110492008B (en) * | 2018-05-14 | 2020-06-12 | 江苏三月光电科技有限公司 | Thermal activation delayed fluorescence organic electroluminescent device |
| KR20200020538A (en) * | 2018-08-17 | 2020-02-26 | 엘지디스플레이 주식회사 | Organic light emitting diode device |
| CN112331130A (en) * | 2019-07-31 | 2021-02-05 | Tcl集团股份有限公司 | Drive method and drive device of quantum dot light-emitting diode and display device |
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