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Compound, hole transport material and organic electroluminescent device

A compound and unsubstituted technology, applied in the field of organic electroluminescent devices, can solve the problems of weak hole transition capability, short device life, and high device voltage, and achieve the effects of low device voltage, lower turn-on voltage, and improved service life.

Pending Publication Date: 2020-09-08
YANTAI XIANHUA CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing hole transport layer materials containing fluorene groups have weak hole transition ability, and the prepared devices have high voltage, which makes the device life short

Method used

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  • Compound, hole transport material and organic electroluminescent device
  • Compound, hole transport material and organic electroluminescent device
  • Compound, hole transport material and organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0127] (1) The glass plate coated with the transparent conductive layer of ITO is ultrasonically treated in a commercial cleaning agent, rinsed with deionized water, degreased ultrasonically in acetone-ethanol mixed solvent, and baked in a clean environment until the water is completely removed parts, cleaned with UV light and ozone, and bombarded with a beam of low-energy cations;

[0128] (2) the above-mentioned glass substrate with the anode electrode is placed in the vacuum chamber, and the vacuum is evacuated to less than 10 -5 Torr, HT-11 was vacuum-deposited on the above-mentioned anode layer film as a hole injection layer, the evaporation rate was 0.1nm / s, and the evaporation rate of the p-type dopant was 3 times the evaporation rate of the hole injection material HT-11. %, the evaporated film thickness is 10nm;

[0129] (3) Vacuum evaporation of A1 material on the hole injection layer as the hole transport layer, the evaporation rate is 0.1nm / s, and the evaporation f...

Embodiment 2-6

[0135] Except that the hole transport materials are A4, A6, A15, A20, and A23, the rest are the same as in Example 1.

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Abstract

The invention provides a compound represented by general formula (I). The compound can be used in an organic electroluminescent device as a hole transport material. The compound has a large conjugateplane, facilitates molecular accumulation, and has good thermodynamic stability; when used as the hole transport material, the compound is high in hole transition capability, has a proper energy levelwith an adjacent layer, is beneficial to hole injection and migration, can effectively reduce the turn-on voltage of the prepared organic electroluminescent device, has a relatively high hole migration rate, can realize good electroluminescent efficiency in the device, and can prolong the service life of the device. The invention further provides the organic electroluminescent device containing the compound of the general formula (I), and a display device.

Description

technical field [0001] The present application relates to the field of organic light-emitting display, in particular to a hole transport material and an organic electroluminescence device containing the hole transport material. Background technique [0002] Electroluminescence (EL) refers to the phenomenon that luminescent materials are excited by current and voltage under the action of an electric field to emit light. It is a luminescent process that directly converts electrical energy into light energy. Organic electroluminescence display (hereinafter referred to as OLED) has a series of advantages such as self-luminescence, low-voltage DC drive, full curing, wide viewing angle, light weight, simple composition and process. Compared with liquid crystal displays, organic electroluminescent displays do not require a backlight, and have a large viewing angle, low power, and fast response speed. Its response speed can reach 1000 times that of liquid crystal displays, but its m...

Claims

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Application Information

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IPC IPC(8): C07D333/76C07D209/80C07D209/88C07D307/77C07D307/91C07D333/50C07D401/12C07D405/12C07D405/14C07D409/12C07D409/14C07D491/048H01L51/54H01L51/50
CPCC07D307/77C07D405/14C07D491/048C07D405/12C07D307/91C07D333/50C07D409/12C07D409/14C07D333/76C07D209/88C07D401/12C07D209/80H10K85/615H10K85/626H10K85/636H10K85/633H10K85/657H10K85/6572H10K85/6574H10K85/6576H10K50/15
Inventor 邢其锋丰佩川韩岳孙伟胡灵峰陈跃
Owner YANTAI XIANHUA CHEM TECH CO LTD
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