WO2022041200A1 - 一种有机电致发光器件 - Google Patents
一种有机电致发光器件 Download PDFInfo
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- WO2022041200A1 WO2022041200A1 PCT/CN2020/112492 CN2020112492W WO2022041200A1 WO 2022041200 A1 WO2022041200 A1 WO 2022041200A1 CN 2020112492 W CN2020112492 W CN 2020112492W WO 2022041200 A1 WO2022041200 A1 WO 2022041200A1
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- 239000000463 material Substances 0.000 claims abstract description 65
- 238000004770 highest occupied molecular orbital Methods 0.000 claims description 65
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 claims description 65
- 230000000903 blocking effect Effects 0.000 claims description 16
- 230000005525 hole transport Effects 0.000 claims description 10
- 238000001894 space-charge-limited current method Methods 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 4
- 230000002950 deficient Effects 0.000 claims description 4
- 125000001072 heteroaryl group Chemical group 0.000 claims description 4
- 150000004826 dibenzofurans Chemical class 0.000 claims description 2
- WUNJCKOTXFSWBK-UHFFFAOYSA-N indeno[2,1-a]carbazole Chemical group C1=CC=C2C=C3C4=NC5=CC=CC=C5C4=CC=C3C2=C1 WUNJCKOTXFSWBK-UHFFFAOYSA-N 0.000 claims description 2
- 229940083082 pyrimidine derivative acting on arteriolar smooth muscle Drugs 0.000 claims description 2
- 150000003230 pyrimidines Chemical class 0.000 claims description 2
- 125000005259 triarylamine group Chemical group 0.000 claims description 2
- 150000003918 triazines Chemical class 0.000 claims description 2
- IANQTJSKSUMEQM-UHFFFAOYSA-N 1-benzofuran Chemical compound C1=CC=C2OC=CC2=C1 IANQTJSKSUMEQM-UHFFFAOYSA-N 0.000 claims 2
- 125000000609 carbazolyl group Chemical class C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 claims 2
- TXCDCPKCNAJMEE-UHFFFAOYSA-N dibenzofuran Chemical compound C1=CC=C2C3=CC=CC=C3OC2=C1 TXCDCPKCNAJMEE-UHFFFAOYSA-N 0.000 claims 2
- PMJHHCWVYXUKFD-SNAWJCMRSA-N (E)-1,3-pentadiene Chemical group C\C=C\C=C PMJHHCWVYXUKFD-SNAWJCMRSA-N 0.000 claims 1
- 150000004908 diazepines Chemical class 0.000 claims 1
- VVVPGLRKXQSQSZ-UHFFFAOYSA-N indolo[3,2-c]carbazole Chemical group C1=CC=CC2=NC3=C4C5=CC=CC=C5N=C4C=CC3=C21 VVVPGLRKXQSQSZ-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000009977 dual effect Effects 0.000 abstract description 9
- 239000002346 layers by function Substances 0.000 abstract description 7
- 239000010410 layer Substances 0.000 description 67
- 230000037230 mobility Effects 0.000 description 28
- 238000001704 evaporation Methods 0.000 description 10
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- 238000000034 method Methods 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
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- 239000011368 organic material Substances 0.000 description 4
- 230000006798 recombination Effects 0.000 description 4
- 238000005215 recombination Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 150000001716 carbazoles Chemical class 0.000 description 3
- 238000007738 vacuum evaporation Methods 0.000 description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000012044 organic layer Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- STTGYIUESPWXOW-UHFFFAOYSA-N 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline Chemical compound C=12C=CC3=C(C=4C=CC=CC=4)C=C(C)N=C3C2=NC(C)=CC=1C1=CC=CC=C1 STTGYIUESPWXOW-UHFFFAOYSA-N 0.000 description 1
- ZKMJOUUZBQAFLF-UHFFFAOYSA-N 4H-diazaphosphole Chemical group N=1N=PCC=1 ZKMJOUUZBQAFLF-UHFFFAOYSA-N 0.000 description 1
- NSXJEEMTGWMJPY-UHFFFAOYSA-N 9-[3-(3-carbazol-9-ylphenyl)phenyl]carbazole Chemical group C12=CC=CC=C2C2=CC=CC=C2N1C1=CC(C=2C=CC=C(C=2)N2C3=CC=CC=C3C3=CC=CC=C32)=CC=C1 NSXJEEMTGWMJPY-UHFFFAOYSA-N 0.000 description 1
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- JCRVSZZAODTTDF-UHFFFAOYSA-N C1=CC=CC=2C3=CC=CC=C3NC12.C1=CC=CC=2C3=CC=CC=C3C3=CC=CC=C3C12 Chemical group C1=CC=CC=2C3=CC=CC=C3NC12.C1=CC=CC=2C3=CC=CC=C3C3=CC=CC=C3C12 JCRVSZZAODTTDF-UHFFFAOYSA-N 0.000 description 1
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- SIKJAQJRHWYJAI-UHFFFAOYSA-N benzopyrrole Chemical group C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 238000010549 co-Evaporation Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- XTLNYNMNUCLWEZ-UHFFFAOYSA-N ethanol;propan-2-one Chemical compound CCO.CC(C)=O XTLNYNMNUCLWEZ-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- PZOUSPYUWWUPPK-UHFFFAOYSA-N indole Chemical group CC1=CC=CC2=C1C=CN2 PZOUSPYUWWUPPK-UHFFFAOYSA-N 0.000 description 1
- RKJUIXBNRJVNHR-UHFFFAOYSA-N indolenine Chemical group C1=CC=C2CC=NC2=C1 RKJUIXBNRJVNHR-UHFFFAOYSA-N 0.000 description 1
- 125000001041 indolyl group Chemical group 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- -1 oxides Substances 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- HYXGAEYDKFCVMU-UHFFFAOYSA-N scandium oxide Chemical compound O=[Sc]O[Sc]=O HYXGAEYDKFCVMU-UHFFFAOYSA-N 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010944 silver (metal) Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
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- H10K85/622—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene containing four rings, e.g. pyrene
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Definitions
- the present invention relates to an organic electroluminescent device in which a dual host material having a specific P:N ratio is used, and the energy level and mobility of the functional layer material are adjusted to be within a specific range, which enables a wide variety of P:N: Better device performance can be produced under the N ratio, thus providing more possibilities for device selection.
- OLEDs organic electroluminescent displays
- two-component host materials are mostly used in light-emitting devices based on phosphorescent host materials, one of which is an electron-type material (N-type) and the other material is a hole-type material (P-type material). type), electrons and holes combine at the interface after conduction through the two materials.
- N-type electron-type material
- P-type material hole-type material
- type electrons and holes combine at the interface after conduction through the two materials.
- the two materials used in dual host materials are more widely sourced, and a combination of different materials can be used to achieve better device performance.
- the present invention relates to an organic electroluminescent device that defines the relationship between the P:N ratio in the host of the emissive layer and the energy level and mobility of the functional layer material, which enables it to operate at various P:N ratios Both can produce better device performance, thus providing more possibilities for device selection. Furthermore, it was surprisingly found that when the P:N ratio in the host of the light-emitting layer is within a certain range, by setting the mobilities of the hole transport layer and the electron transport layer to be within a certain range, a better device performance.
- the present invention relates to an organic electroluminescent device in which a dual host material with a specific P:N ratio is used and the energy level and mobility of the functional layer material are adjusted to be within a specific range.
- the present invention relates to an organic electroluminescent device comprising an anode, a hole transport layer (HTL), an electron blocking layer (EBL), an emissive layer (EML), a hole blocking layer (HBL), an electron transport layer (ETL), a cathode, wherein the light-emitting layer comprises at least one phosphorescent guest compound and at least two host materials, and the host materials are N-type materials and P-type materials, respectively, wherein the weight of the N-type material and the P-type material is The ratio P:N is 1:5 to 5:1, characterized by:
- HTL The mobility of HTL is 5.0 ⁇ 10 -6 cm 2 /Vs to 1.0 ⁇ 10 -3 cm 2 /Vs;
- the ETL mobility ranges from 5.0 ⁇ 10 -8 cm 2 /Vs to 8.0 ⁇ 10 -6 cm 2 /Vs
- the HTL mobility ranges from 1.0 ⁇ 10 -5 cm 2 /Vs to 9.0 ⁇ 10 -4 cm 2 /Vs,
- the HTL mobility ranges from 5.5 ⁇ 10 -4 cm 2 /Vs to 8.0 ⁇ 10 -4 cm 2 /Vs
- P:N is 1:4 to 4:1, preferably 1:3 to 3:1.
- the present invention relates to an organic electroluminescent device, characterized in that:
- the HTL mobility ranges from 5.5 ⁇ 10 -4 cm 2 /Vs to 8.0 ⁇ 10 -4 cm 2 /Vs
- the HTL mobility ranges from 5.5 ⁇ 10 -4 cm 2 /Vs to 8.0 ⁇ 10 -4 cm 2 /Vs
- the HTL mobility ranges from 5.5 ⁇ 10 -4 cm 2 /Vs to 8.0 ⁇ 10 -4 cm 2 /Vs
- the HTL mobility ranges from 5.5 ⁇ 10 -4 cm 2 /Vs to 8.0 ⁇ 10 -4 cm 2 /Vs
- the HTL mobility ranges from 8.0 ⁇ 10 -5 cm 2 /Vs to 8.0 ⁇ 10 -4 cm 2 /Vs
- the total concentration of phosphorescent guest compound is 5-20 wt%, preferably 8-14 wt%, more preferably 9-12 wt%, based on the sum of the weights of host material and guest material.
- the structure of the organic light-emitting device of the present invention is known in the art. As shown in FIG. 1, it includes an anode and a cathode on a substrate, and an organic layer between the anode and the cathode, and the organic layer may be a multi-layer structure.
- the organic material layer may include a hole transport layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transport layer.
- the organic material layer of the present invention may further include an electron injection layer.
- the anode material can be transparent conductive materials such as indium tin oxide (ITO), indium zinc oxide (IZO), tin dioxide (SnO 2 ), and zinc oxide (ZnO) known in the prior art, or silver and its alloys , metal materials such as aluminum and its alloys, organic conductive materials such as polydioxyethylthiophene (PEDOT), and multi-layer structures of the above materials.
- transparent conductive materials such as indium tin oxide (ITO), indium zinc oxide (IZO), tin dioxide (SnO 2 ), and zinc oxide (ZnO) known in the prior art, or silver and its alloys , metal materials such as aluminum and its alloys, organic conductive materials such as polydioxyethylthiophene (PEDOT), and multi-layer structures of the above materials.
- the cathode material can be selected from, but not limited to, LiF/Al, ITO, metals, oxides, and other materials.
- the metal may be selected from Mg, Ag, Al and alloys thereof, preferably from Mg/Ag alloys and Mg/Al alloys.
- the oxide may be selected from yttrium oxide, scandium oxide and rare earth metal oxides.
- HTL hole transport layer
- EBL electron blocking layer
- the light-emitting layer may contain a host material and a guest material, wherein the host material is a dual host, ie, contains N-type and P-type host materials.
- the P-type material is selected from the group consisting of triarylamine derivatives, carbazole derivatives, fused carbazole derivatives, carbazole triphenylene derivatives, and dibenzofurans and benzofuranyl diphenyls One or more of the furan derivatives;
- the N-type material is selected from triazine derivatives, pyrimidine derivatives, diazaphosphacyclopentadiene derivatives, indole substituted by electron-deficient heteroaromatic groups One or more of carbazole derivatives, and indenocarbazole derivatives substituted with electron-deficient heteroaromatic groups.
- the N-type and P-type host materials respectively include, but are not limited to, combinations of one or more of the conventional materials shown below:
- the guest material of the light-emitting layer may be selected from, but not limited to, a combination of one or more of GD-1 to GD-10 listed below:
- ETL electron transport layer
- HBL hole blocking layer
- the material of the electron injection layer is selected from, but not limited to, LiF, Yb, LIQ, Mg:LiF, and the like.
- HTL and ETL can be vapor-deposited individually or co-evaporated (doped) with two or more materials.
- each layer is known in the art, for example:
- Anode 10-300nm, preferably 50-250nm, more preferably 100-200nm;
- Hole transport layer 10-200nm, preferably 50-150nm, more preferably 80-120nm;
- Electron blocking layer 0.5-20 nm, preferably 0.8-10 nm, more preferably 0.8-5 nm;
- Light-emitting layer 5-100nm, preferably 10-50nm, more preferably 20-40nm;
- Hole blocking layer 0.5-20nm, preferably 0.8-10nm, more preferably 0.8-5nm;
- Electron transport layer 5-100nm, preferably 10-50nm, more preferably 20-40nm;
- Electron injection layer 0.5-20nm, preferably 0.8-10nm, more preferably 0.8-5nm;
- Cathode 10-300 nm, preferably 50-250 nm, more preferably 100-200 nm.
- the present invention also relates to a method of preparing the OLED device of the present invention, which comprises stacking the layers in sequence.
- the layers of the OLED device of the present invention can be stacked using an evaporation process.
- the specific process of the evaporation process can be: using the method of electric current heating to evaporate the desired material into atoms or molecules, these atoms and molecules will be separated from the material itself due to thermal motion, move upward, move During the process, it contacts with the substrate, and condensation accumulates on the substrate to form various film layers.
- the process of preparing each film layer by high-temperature vapor deposition is performed in an environment with a vacuum degree higher than 4 ⁇ 10 -4 Pa, preferably 1 ⁇ 10 -5 Pa to 1 ⁇ 10 -6 Pa.
- the evaporation rate is 0.01-10 nm/s, preferably 0.05-2 nm/s.
- Fig. 1 is the schematic diagram of the structure of the OLED device of the present invention, wherein:
- FIG. 2 shows the difference in efficiency and lifetime of the OLED device of the present invention under different ratios of PN components.
- FIG. 3 shows changes in exciton recombination regions of the OLED devices of Example 1 and Comparative Example 1.
- the preparation process of organic electroluminescent device is as follows:
- the light-emitting layer of the device is vacuum-evaporated on the electron blocking layer.
- LiF was vacuum-evaporated to a thickness of 0.5 nm on the electron transport layer (ETL) as an electron injection layer.
- ETL electron transport layer
- the HOMO and LUMO of the HTL layer and ETL layer are as follows:
- the HOMO and LUMO of the EML layer, HBL layer and EBL layer are as follows:
- LUMO -2.25eV
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Abstract
Description
HTL | HOMO | LUMO | 迁移率 | ETL | HOMO | LUMO | 迁移率 |
HT-1 | -5.23 | -2.24 | 5.3*10 -4 | ET-1 | -6.45 | -3.20 | 4.6*10 -7 |
HT-2 | -5.44 | -2.37 | 6.8*10 -4 | ET-5 | -6.5 | -3.26 | 5.7*10 -7 |
HT-5 | -5.37 | -2.34 | 6.4*10 -4 | ET-4 | -6.47 | -3.30 | 2.3*10 -7 |
HT-6 | -5.35 | -2.40 | 7.2*10 -4 | ET-8 | -6.42 | -3.28 | 1.2*10 -6 |
Claims (19)
- 一种有机电致发光器件,其包括阳极、空穴传输层(HTL)、电子阻挡层(EBL)、发光层(EML)、空穴阻挡层(HBL)、电子传输层(ETL)、阴极,其中所述发光层包含至少一种磷光客体化合物和至少两种主体材料,且所述主体材料分别为N型材料和P型材料,其中N型材料与P型材料的重量比P:N为1:5至5:1,其特征在于:0.02eV≤HOMO(HTL)-HOMO(EML)≤0.65eV。
- 如权利要求1所述的有机电致发光器件,其特征在于:0.25eV≤LUMO(EML)-LUMO(ETL)≤1.00eV。
- 如权利要求1或2所述的有机电致发光器件,其特征在于:0.01eV≤HOMO(HTL)-HOMO(EBL)≤0.28eV。
- 如权利要求3所述的有机电致发光器件,其特征在于:1.00eV≤LUMO(HBL)-LUMO(ETL)≤1.50eV。
- 如权利要求1-4中任一项所述的有机电致发光器件,其特征在于:HTL迁移率为5.0×10 -6cm 2/Vs至1.0×10 -3cm 2/Vs,ETL迁移率为5.0×10 -8cm 2/Vs至8.0×10 -6cm 2/Vs,其中所述迁移率根据SCLC方法测试。
- 如权利要求1-4中任一项所述的有机电致发光器件,其中P:N的重量比为1:4至4:1,优选为1:3至3:1。
- 如权利要求1-6中任一项所述的有机电致发光器件,其特征在于:当P:N比例为7:3时,(1)0.40eV≤HOMO(HTL)-HOMO(EML)≤0.55eV,0.28eV≤LUMO(EML)-LUMO(ETL)≤0.40eV;当P:N为6:4时,(1)0.45eV≤HOMO(HTL)-HOMO(EML)≤0.55eV,0.30eV≤LUMO(EML)-LUMO(ETL)≤0.40eV。
- 如权利要求7所述的有机电致发光器件,其特征在于:当P:N比例为7:3时,(2)0.05eV≤HOMO(HTL)-HOMO(EBL)≤0.15eV,1.00eV≤LUMO(HBL)-LUMO(ETL)≤1.10eV;当P:N为6:4时,(2)0.10eV≤HOMO(HTL)-HOMO(EBL)≤0.20eV,1.00eV≤LUMO(HBL)-LUMO(ETL)≤1.10eV。
- 如权利要求7或8所述的有机电致发光器件,其特征在于:当P:N比例为7:3时,(3)HTL迁移率为5.5×10 -4cm 2/Vs至8.0×10 -4cm 2/Vs,ETL迁移率为1.0×10 -7cm 2/Vs至7.0×10 -7cm 2/Vs;当P:N为6:4时,(3)HTL迁移率为5.5×10 -4cm 2/Vs至8.0×10 -4cm 2/Vs,ETL迁移率为1.0×10 -7cm 2/Vs至3.0×10 -7cm 2/Vs;其中所述迁移率根据SCLC方法测试。
- 如权利要求1-6中任一项所述的有机电致发光器件,其特征在于:当P:N比例为5:5时,(1)0.40eV≤HOMO(HTL)-HOMO(EML)≤0.50eV,0.25eV≤LUMO(EML)-LUMO(ETL)≤0.35eV。
- 如权利要求10所述的有机电致发光器件,其特征在于:当P:N比例为5:5时,(2)0.05eV≤HOMO(HTL)-HOMO(EBL)≤0.15eV,1.00eV≤LUMO(HBL)-LUMO(ETL)≤1.10eV。
- 如权利要求10或11所述的有机电致发光器件,其特征在于:当P:N比例为5:5时,(3)HTL迁移率为5.5×10 -4cm 2/Vs至8.0×10 -4cm 2/Vs,ETL迁移率为5.0×10 -7cm 2/Vs至8.0×10 -7cm 2/Vs;其中所述迁移率根据SCLC方法测试。
- 如权利要求1-6中任一项所述的有机电致发光器件,其特征在于:当P:N比例为4:6时,(1)0.45eV≤HOMO(HTL)-HOMO(EML)≤0.60eV,0.25≤LUMO(EML)-LUMO(ETL)≤0.40eV;当P:N比例为3:7时,(1)0.40eV≤HOMO(HTL)-HOMO(EML)≤0.55eV,0.27≤LUMO(EML)-LUMO(ETL)≤0.35eV。
- 如权利要求13所述的有机电致发光器件,其特征在于:当P:N比例为4:6时,(2)0.10eV≤HOMO(HTL)-HOMO(EBL)≤0.20eV,1.00≤LUMO(HBL)-LUMO(ETL)≤1.10eV;当P:N比例为3:7时,(2)0.10eV≤HOMO(HTL)-HOMO(EBL)≤0.20eV;0.50≤LUMO(HBL)-LUMO(ETL)≤1.0eV。
- 如权利要求13或14所述的有机电致发光器件,其特征在于:当P:N比例为4:6时,(3)HTL迁移率为5.5×10 -4cm 2/Vs至8.0×10 -4cm 2/Vs,ETL迁移率为9.0×10 -7cm 2/Vs至2.0×10 -6cm 2/Vs;当P:N比例为3:7时,(3)HTL迁移率为8.0×10 -5cm 2/Vs至8.0×10 -4cm 2/Vs,ETL迁移率为1.0×10 -7cm 2/Vs至6.0×10 -7cm 2/Vs;其中所述迁移率根据SCLC方法测试。
- 如权利要求1-15中任一项所述的有机电致发光器件,其特征在于:LUMO(EML)≤-2.0eV且HOMO(EML)≥-6.0eV。
- 如权利要求1-16中任一项所述的有机电致发光器件,其特征在于:其中磷光客体化合物的总浓度为5-20重量%,基于主体材料和客体材料的重量之和。
- 如权利要求1-17中任一项所述的有机电致发光器件,其特征在于:所述P型材料选自三芳基胺衍生物、咔唑衍生物、稠合咔唑衍生物、咔唑三亚苯衍生物以及二苯并呋喃和苯并呋喃基二苯并呋喃衍生物中的一种或多种;所述N型材料选自三嗪衍生物、嘧啶衍生物、二氮杂磷杂环戊二烯衍生物、被缺电子杂芳族基团取代的吲哚并咔唑衍生物和被缺电子杂芳族基 团取代的茚并咔唑衍生物中的一种或多种。
- 一种制备如权利要求1-18中任一项所述的有机电致发光器件的方法,其包括依次层叠各层。
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CN106558652A (zh) * | 2015-09-30 | 2017-04-05 | 乐金显示有限公司 | 有机发光装置 |
CN108232025A (zh) * | 2018-01-31 | 2018-06-29 | 昆山国显光电有限公司 | 一种有机电致发光器件 |
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US20110140089A1 (en) * | 2008-05-13 | 2011-06-16 | Fuji Electric Holdings Co., Ltd. | Organic el device |
CN106558652A (zh) * | 2015-09-30 | 2017-04-05 | 乐金显示有限公司 | 有机发光装置 |
CN109994636A (zh) * | 2018-01-02 | 2019-07-09 | 固安鼎材科技有限公司 | 一种有机电致发光器件 |
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