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Blue-light TADF (thermally activated delayed fluorescence) aromatic material containing carbazole dendrites, method for preparing warm white device from blue-light TADF aromatic material and application of blue-light TADF aromatic material

A technology of delayed fluorescence and aromatic materials, applied in luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., can solve the problems of low blue color purity, low efficiency, poor material singleness, etc. The effect of reducing energy loss and increasing rigidity

Active Publication Date: 2017-10-10
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of poor singleness of existing TADF blue light guest materials, low blue light color purity and low efficiency, and to provide a blue light thermally excited delayed fluorescent aromatic material containing carbazole dendrites and a warm white light device preparation method and application thereof

Method used

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  • Blue-light TADF (thermally activated delayed fluorescence) aromatic material containing carbazole dendrites, method for preparing warm white device from blue-light TADF aromatic material and application of blue-light TADF aromatic material
  • Blue-light TADF (thermally activated delayed fluorescence) aromatic material containing carbazole dendrites, method for preparing warm white device from blue-light TADF aromatic material and application of blue-light TADF aromatic material
  • Blue-light TADF (thermally activated delayed fluorescence) aromatic material containing carbazole dendrites, method for preparing warm white device from blue-light TADF aromatic material and application of blue-light TADF aromatic material

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specific Embodiment approach 1

[0047] Specific implementation mode 1: In this implementation mode, the structural formula of the blue-light thermally excited delayed fluorescent aromatic material containing carbazole dendrites is: Wherein, the R is H or t-C 4 h 9 .

specific Embodiment approach 2

[0048] Embodiment 2: In this embodiment, the blue-light thermally excited delayed fluorescent aromatic material containing carbazole dendrites is prepared from nitrogen-containing heterocyclic compound dendrites and dibromodifluorobenzene.

specific Embodiment approach 3

[0049] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the described nitrogen-containing heterocyclic compound branch is specifically completed according to the following steps:

[0050] 1. Preparation of carbazole protection: under the conditions of ice-water bath and stirring, add carbazole to dimethylformamide, then add potassium hydroxide, and then react for 1.5h to 2.5h under the conditions of ice-water bath and stirring, and then Add p-toluenesulfonyl chloride solution, and then react for 3h to 5h under the conditions of ice-water bath and stirring. After the reaction, use a mixture of water and dichloromethane to extract to obtain a dichloromethane layer, and then use anhydrous sulfuric acid to Dry the dichloromethane layer with sodium, then use a rotary evaporator to evaporate the dichloromethane under normal pressure, and then cool to room temperature to obtain the crude reaction product I; add ethyl acetate to the crud...

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Abstract

The invention relates to a blue-light TADF (thermally activated delayed fluorescence) aromatic material containing carbazole dendrites, a method for preparing a warm white device from the blue-light TADF aromatic material and an application of the blue-light TADF aromatic material, relates to a TADF material, a preparation method and an application, and aims to solve the problems that the conventional TADF blue-light guest material is poor in unicity, low in blue light color purity and low in efficiency. The structural formula of the blue-light TADF aromatic material containing the carbazole dendrites is shown in the description. The blue-light TADF aromatic material containing the carbazole dendrites is prepared from nitrogen-containing heterocyclic compound dendrites as well as dibromo difluorobenzene. The blue-light TADF aromatic material containing the carbazole dendrites is applied to a TADF electroluminescent device as a host luminescent material or a guest luminescent material and is applied to a phosphorescent device or the warm white device as the host luminescent material. The blue-light TADF aromatic material containing the carbazole dendrites and the method for preparing the device can be obtained.

Description

technical field [0001] The invention relates to a heat-excited delayed fluorescent material, a preparation method and an application. Background technique [0002] Preparation of white organic light-emitting devices has great significance in solid-state lighting and full-color display. In a white light device constructed with blue light and yellow light, the luminous efficiency of pure blue light and yellow light has an important impact on the entire device. Therefore, the construction of high-efficiency blue light materials is conducive to improving the performance of white light devices. Most of the reported white or warm white light devices consist of three or two light-emitting layers, requiring high equipment and complicated manufacturing processes. The reported efficiency of single-layer white light devices is also low, such as the efficiency of single-layer white light devices reported by LianDuan is about 10%. [0003] Phosphorous organic electroluminescent diodes...

Claims

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Application Information

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IPC IPC(8): C07F9/6558C09K11/06H01L51/50H01L51/56H01L51/54
CPCC09K11/06C07F9/65583C09K2211/1014C09K2211/1029H10K85/6572H10K50/12H10K71/00Y02B20/00
Inventor 许辉梁倩倩杨鹤韩春苗张静
Owner HEILONGJIANG UNIV
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