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ESIPT luminescent material with delayed fluorescence property and preparation method and application thereof

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 high luminous efficiency, good carrier transport efficiency, and appropriate energy levels Effect

Active Publication Date: 2019-06-28
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • 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 property and preparation method and application thereof
  • ESIPT luminescent material with delayed fluorescence property and preparation method and application thereof
  • ESIPT luminescent material with delayed fluorescence property and preparation method and application thereof

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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 a delayed fluorescence property and a preparation method and application thereof. Based on the special property of ESIPT, the luminescent material with the delayed fluorescence property and large Strokes shift is designed and synthesized. Meanwhile, the ESIPT luminescent material has the proper molecular energy level, high luminescent efficiency and a good film forming property, and can serve as a yellow light doping material for preparing a non-energy-transfer type luminescent thin film. In a finished organic electroluminescence device, the ESIPT luminescent material and a subject material do not suffer from energy transfer, proportional control over luminescent peaks of a subject and an object can be achieved by adjusting the doping proportion, and therefore repeatable multi-color luminescent OLEDs with the adjustable chroma are successfully prepared.

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