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Blue-light thermally excited delayed fluorescent aromatic material containing carbazole dendrites and its preparation method and application of warm white light device

A technology of delayed fluorescence and aromatic materials, which is applied in the fields of luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc. It can solve the problems of poor material uniformity, low efficiency, and low purity of blue light, and achieve high triplet energy, Effect of reduced energy loss, good carrier transport capability

Active Publication Date: 2019-09-03
HEILONGJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 thermally excited delayed fluorescent aromatic material containing carbazole dendrites and its preparation method and application of warm white light device
  • Blue-light thermally excited delayed fluorescent aromatic material containing carbazole dendrites and its preparation method and application of warm white light device
  • Blue-light thermally excited delayed fluorescent aromatic material containing carbazole dendrites and its preparation method and application of warm white light device

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specific Embodiment approach 1

[0046] 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

[0047] 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

[0048] 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:

[0049] 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

A blue-light thermally excited delayed fluorescent aromatic material containing carbazole dendrites and a preparation method and application thereof for a warm white light device, which relate to a thermally excited delayed fluorescent material, a preparation method and an application. The purpose of the present invention is to solve the problems of poor uniformity of existing TADF blue light guest materials, low color purity and low efficiency of blue light. The structural formula of the thermally excited delayed fluorescent aromatic material containing carbazole dendrons is The blue-light heat-excited delayed fluorescent aromatic material containing carbazole branch is prepared from nitrogen-containing heterocyclic compound branch and dibromodifluorobenzene. The thermally excited delayed fluorescent aromatic material containing carbazole dendrites is used as a host luminescent material or a guest luminescent material in a thermally excited delayed fluorescent electroluminescence device, and as a host luminescent material in a phosphorescent device or a warm white light device. The invention can obtain the blue light thermal excitation delay fluorescent aromatic material containing carbazole dendrites and the preparation method of the devices thereof.

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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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/6558C09K11/06H01L51/50H01L51/56H01L51/54
CPCC09K11/06C07F9/65583C09K2211/1014C09K2211/1029H10K85/6572H10K50/12H10K71/00Y02B20/00
Inventor 许辉张静韩春苗梁倩倩杨鹤
Owner HEILONGJIANG UNIV
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