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Compound taking benzofuran indole as donor, and application thereof

A technology of benzofuran and compounds, which is applied in the field of organic electroluminescent functional materials and devices, can solve problems such as color purity defects of blue light materials, failure to meet practical requirements, and unsatisfactory device life, so as to improve orbital energy levels and three-line The effect of state energy, excellent optical properties, and excellent performance

Active Publication Date: 2022-01-14
XIAN RUILIAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TADF materials can not only be used as the emitter in the light-emitting layer, but also can be used as the host material or auxiliary host material in the light-emitting layer to sensitize the emitter. This type of device helps to improve the efficiency of traditional devices and improve the color of the device. It is a kind of organic electroluminescent functional material with broad application prospects, but the red, green and blue light materials of TADF materials have not yet achieved industrialization.
[0003]The structure of TADF materials is generally composed of electron-donating groups-electron-withdrawing groups connected by π bonds, but there are very few types of electron-donating groups that can be used at present , especially there are few high-quality TADF blue light materials, and there are defects in the color purity of the blue light materials reported so far, and the device life is not ideal enough to meet the practical requirements. Therefore, it is very important to design and invent new electron-donating groups to develop new blue light TADF materials.

Method used

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  • Compound taking benzofuran indole as donor, and application thereof
  • Compound taking benzofuran indole as donor, and application thereof
  • Compound taking benzofuran indole as donor, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This example provides the preparation method of compound 1, compound 4, compound 6, compound 9, compound 12, compound 16, compound 17, compound 18, compound 22, compound 25, compound 31, compound 37, compound 45 and process, and tested its t 1 The energy level and the HOMO and LUMO energy levels are as follows:

[0034] (1) Synthesis of Intermediate-3

[0035]

[0036] In a three-necked flask, add 100g of intermediate-1, 189g of intermediate-2, 170g of potassium carbonate, 1L of toluene, 400ml of ethanol, and 200ml of water, replace the air in the system with nitrogen, and add 3.6g of tetrakis(triphenylene) base phosphine) palladium, heated to reflux reaction for 8 hours, cooled and separated the liquids after TLC monitored the complete reaction of the raw materials, washed the organic phase with water to neutrality and dried with anhydrous sodium sulfate, purified by column chromatography to obtain 111.5g intermediate-3, Yield 57.2%.

[0037] (2) Synthesis of Int...

Embodiment 2

[0118] This example provides the application effect of the benzofuranoindole-donor compound prepared in Example 1 in organic electroluminescent devices. Among them, the structure of the organic electroluminescent device is specifically as follows figure 1 shown.

[0119] (1) Composition of organic electroluminescent devices

[0120] The composition of the organic electroluminescent device used in this embodiment includes a substrate 1, an anode layer 2, a hole injection layer 3, a first hole transport layer 4, a second hole transport layer 5, a light emitting layer 6, A hole blocking layer 7 , an electron transport layer 8 , an electron injection layer 9 and a cathode layer 10 .

[0121] Among them, the material of the anode layer 2 is indium tin oxide (ITO) with a high work function, the material of the hole injection layer 3 is HAT-CN, and the thickness is 5nm; the material of the first hole transport layer 4 is NPB, and the thickness is 60nm; The material of the second h...

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Abstract

The invention belongs to the technical field of organic electroluminescent functional materials and devices, and relates to a compound taking benzofuran indole as a donor. The structural formula of the compound is as shown in formula (1). According to the compound with the benzofuran indole as the donor, a specific electron-withdrawing group is introduced at a specific position to modify the benzofuran indole to form a brand new compound, and the compound has the bipolar characteristic and TADF property; and the compound can be used as a luminescent layer main body material and / or luminescent material to effectively improve the luminescent efficiency and prolong the service life of the organic electroluminescent device.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescent functional materials and devices, and specifically relates to a compound using benzofuranoindole as a donor and an application thereof. Background technique [0002] As a self-luminous electronic component, the light-emitting mechanism of organic light-emitting diodes (OLED, Organic Light Emission Diodes) display and lighting components is a new type of direct conversion of electrical energy into light energy with the help of organic semiconductor functional materials under the action of a DC electric field. Photoelectric information technology. According to the principle of light emission, organic electroluminescent elements (organic EL elements) can be divided into two types: fluorescent type and phosphorescent type. Phosphorescent materials are composed of heavy metal elements, which can simultaneously utilize singlet and triplet energy through gap crossing, and the internal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D491/048C07D519/00C07F5/02C07F9/6561C09K11/06H01L51/54H01L51/50
CPCC07D491/048C07D519/00C07F9/6561C07F5/027C09K11/06C09K2211/1044C09K2211/1033C09K2211/1011C09K2211/1014H10K85/624H10K85/626H10K85/615H10K85/654H10K85/657H10K85/6572H10K50/11Y02E10/549
Inventor 孙军胡宗学袁江波刘凯鹏田密何海晓张宏科
Owner XIAN RUILIAN NEW MATERIAL CO LTD