Esipt luminescent material with delayed fluorescence properties and its preparation method and application

A technology of luminescent materials and delayed fluorescence, applied in luminescent materials, chemical instruments and methods, organic chemistry, etc., can solve problems such as complex device preparation processes, and achieve broad application prospects, good film-forming properties, and good thermodynamic stability.

Active Publication Date: 2021-12-07
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the above-mentioned methods have the obvious disadvantage of complicated device fabrication process.

Method used

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  • Esipt luminescent material with delayed fluorescence properties and its preparation method and application
  • Esipt luminescent material with delayed fluorescence properties and its preparation method and application
  • Esipt luminescent material with delayed fluorescence properties and its preparation method and application

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preparation example Construction

[0040] The above-mentioned preparation method of the ESIPT luminescent material with delayed fluorescence properties comprises the following steps:

[0041] S1, preparation of intermediate A,

[0042]

[0043] It should be noted here that since in the above compound structure, X is S or O or N. Therefore, when X is the above three elements respectively, the preparation process of intermediate A is slightly different. The preparation of intermediate A-1 and intermediate A-2 will be described below.

[0044] The preparation process of intermediate A-1 (when X is S) is as follows:

[0045]

[0046]Add o-aminothiophenol (1.63g, 12mmol) and 5-bromosalicylic acid (2.14g, 15.6mmol) into 100ml of polyphosphoric acid, and stir at 168°C for 8-16 hours. After the reaction, sodium hydroxide solution was added to the reaction liquid, and adjusted to neutrality with sodium bicarbonate. It was extracted with dichloromethane and a white fluffy solid HBT-4Br (2.6 g) was obtained afte...

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Abstract

The invention discloses an ESIPT luminescent material with delayed fluorescence properties, a preparation method and application thereof. Based on the special properties of ESIPT, the invention designs and synthesizes a luminescent material with delayed fluorescence characteristics and large Stokes shift. At the same time, the ESIPT luminescent material of the present invention has suitable molecular energy levels, high luminous efficiency, and good film-forming properties, and can be used as a yellow light doping material to prepare a non-energy transfer luminescent film. In the finished organic electroluminescent device, the ESIPT light-emitting material of the present invention does not undergo energy transfer with the host material, and the ratio control of the host-guest luminescence peak can be realized by adjusting the doping ratio, thereby successfully preparing a repeatable chromaticity Tunable multi-color light-emitting OLED.

Description

technical field [0001] The invention relates to a class of ESIPT luminescent materials, in particular to a class of ESIPT luminescent materials with delayed fluorescence properties and a preparation method and application thereof, belonging to the technical field of organic electroluminescent materials. Background technique [0002] With the rapid development of organic electronics and the current market requirements for large-area, ultra-thin and flexible solid-state lighting and information display technologies, organic light-emitting diodes (organic light-emitting diodes, OLEDs) rely on their own It has a series of advantages such as all solid state, active light emission, low driving voltage, high efficiency, fast response speed, wide viewing angle, light and thin, large area and flexible display, and has attracted extensive attention from the scientific community and has been rapidly developed. develop. Nowadays, small-sized, active-emitting OLED panels have been comme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D417/14C09K11/06C07D413/00H01L51/50H01L51/54
Inventor 钱妍王英男宋娟密保秀高志强
Owner NANJING UNIV OF POSTS & TELECOMM
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