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Bipolar Molecular Derivatives for Organic Light Emitting Devices

An organic light-emitting element and bipolar molecule technology, which is applied in the field of bipolar molecule derivatives, can solve the problems of unstable process, low brightness, and the driving voltage needs to be improved, so as to achieve the effect of improving the efficiency index.

Inactive Publication Date: 2021-04-02
ECHEM HIGHTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent No. US9136484B2 is a typical bipolar host material used in the light-emitting layer, but its brightness is not high, and the driving voltage still needs to be improved
[0006] Based on the above defects such as unstable process and low brightness, it is necessary to propose an improvement

Method used

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  • Bipolar Molecular Derivatives for Organic Light Emitting Devices
  • Bipolar Molecular Derivatives for Organic Light Emitting Devices
  • Bipolar Molecular Derivatives for Organic Light Emitting Devices

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example

[0035] A-1 synthesis example

[0036] Place acenaphthenequinone (182g, 1mol), 4-bromo-o-phenylenediamine (187g, 1mol) and acetic acid (1.8L) in a reaction flask, set up a condenser tube and a temperature controller device, and raise the temperature to 115 ℃, heated for 16 hours, cooled to room temperature after the reaction, added water and stirred for one hour, filtered the crude product by suction, took the solid and added toluene, heated and stirred until completely dissolved, then purified by column chromatography to obtain light yellow The solid was purified by recrystallization from toluene and methanol to obtain 198 g of solid product A-1.

[0037] A-2 synthesis example

[0038] Place phenanthrenequinone (208g, 1mol), 4-bromo-o-phenylenediamine (187g, 1mol) and acetic acid (1.8L) in a reaction flask, set up a condenser tube and a temperature controller device, and raise the temperature to 115 ℃, heated for 16 hours, cooled to room temperature after the reaction, added...

experiment example 1

[0062] Using compound I-1 as the host material of the light-emitting layer, an organic light-emitting device structure was fabricated for testing. The detailed production method is as follows: firstly, a 3nm hole injection layer is evaporated on the indium tin oxide anode, and the material is HT-1; followed by a 65nm hole transport layer, and the material is HT-2, and then a 30nm light emitting layer, and the material is 10 % RD-1 doped in I-1; followed by electron transport layer 10nm, the material is 50% ET-1 and 50% Liq (8-Quinolinolato lithium) for co-evaporation; finally the metal cathode 100nm, The material is Aluminum.

experiment example 2

[0064] Using compound I-2 as the host material of the light-emitting layer, an organic light-emitting device structure was fabricated for testing. The detailed production method is as follows: firstly, a 3nm hole injection layer is evaporated on the indium tin oxide anode, and the material is HT-1; followed by a 65nm hole transport layer, and the material is HT-2, and then a 30nm light emitting layer, and the material is 10 % of RD-1 doped in I-2; followed by electron transport layer 10nm, the material is 50% of ET-1 and 50% of Liq (8-Quinolinolato lithium) for co-evaporation; finally the metal cathode 100nm, The material is Aluminum.

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PUM

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Abstract

A bipolar molecular derivative used in organic light-emitting elements has both electron and hole transport characteristics. When it is used in the manufacture of organic light-emitting diode elements, it can simplify the main material of the light-emitting layer into a single component. Not only is the material production easier, but it is also beneficial to the process stability of the organic light-emitting element, and promotes the effect of the element having excellent luminous efficiency, and can greatly reduce the operating voltage.

Description

technical field [0001] The invention relates to the main material of the light-emitting layer of an organic light-emitting element, especially a bipolar molecular derivative containing quinoxaline as an acceptor and carbazolyl as a donor. Background technique [0002] The discovery of phosphorescent organic materials is a major breakthrough in organic light-emitting diodes, because phosphorescent materials have an exciton utilization capacity of 75% of the theoretical value. In the light-emitting layer material of the organic light-emitting element, the high-efficiency phosphorescent guest material is doped into the host material, and the energy can be transferred from the host material to the guest material to emit light. Therefore, the combination of the guest material and the host material, the transmission efficiency of the host material, and the balance between electrons and holes are closely related to various performance indicators of the device. [0003] The electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D403/14C07D495/04C09K11/06H01L51/50H01L51/54
CPCC07D403/14C07D495/04C09K11/06C09K2211/1007C09K2211/1029C09K2211/1044C09K2211/1092H10K85/657H10K85/6572H10K50/12
Inventor 杜啟仁萧清文王仁宗许朝胜曾靖雯周孟义
Owner ECHEM HIGHTECH
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