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ESIPT luminescent material with high exciton utilization rate and preparation method and application thereof

A technology of luminescent materials and utilization rate, applied in luminescent materials, chemical instruments and methods, organic chemistry, etc., can solve the problems of high cost, low efficiency of fluorescent OLED devices, complicated manufacturing process, etc., and achieve high efficiency, high luminous efficiency, Prepare simple effects

Pending Publication Date: 2021-10-29
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Technical problem to be solved: In order to overcome the deficiencies in the prior art, this application proposes an ESIPT luminescent material with high exciton utilization rate and its preparation method and application, so as to solve the low efficiency and complicated manufacturing process of fluorescent OLED devices in the prior art , high cost and other issues

Method used

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  • ESIPT luminescent material with high exciton utilization rate and preparation method and application thereof
  • ESIPT luminescent material with high exciton utilization rate and preparation method and application thereof
  • ESIPT luminescent material with high exciton utilization rate and preparation method and application thereof

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Embodiment 1

[0051] The name of the ESIPT luminescent material with high exciton utilization is 3-(2-(3-(benzothiazol-2-yl)-4-hydroxyphenyl)-9,9-dimethylacridine-10( 9H)-yl)phenothiazine 10,10-dioxide (HDAPD-1) and 3-(2-(4-(benzothiazol-2-yl)-3-hydroxyphenyl)-9,9- Dimethylacridinium-10(9H)-base) phenothiazine 10,10-dioxide) (HDAPD-2), the molecular structural formula of the compound is as follows:

[0052]

[0053] A method for preparing an ESIPT luminescent material with high exciton utilization rate, comprising the steps of:

[0054] S1. Preparation of Intermediate A:

[0055]

[0056] Take 2-bromo-9,9-dimethyl-9,10 dihydroacridine (2-BD-Br) (1.44g, 5mmol) and sodium hydride (225mg, 7.5mmol) and mix them into a 100ml flask, seal The vacuum operation is the same as the above description, and then add 25ml of dry (N,N dimethyldiamide) DMF using a syringe, and stir at room temperature for 15 minutes until the solution turns from light yellow to gray and no bubbles come out. Then 3-...

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Abstract

The invention discloses an ESIPT luminescent material with a high exciton utilization rate as well as a preparation method and an application of the ESIPT luminescent material, and the ESIPT material capable of generating a rapid reverse intersystem crossing mechanism from a high-energy-level triplet excitation state to a singlet excitation state is designed and synthesized by combining the ESIPT property and the thermally activated delayed fluorescence property. The molecular excited state of the material has a remarkable hybridization localization-charge transfer property, and has a high exciton utilization rate. Meanwhile, the material disclosed by the invention has good thermal stability and film-forming property, and a monomolecular yellow light OLED and a monomolecular white light OLED are respectively prepared; a TADF blue light material and the ESIPT yellow light material are doped to serve as a light emitting layer, energy transfer between the TADF blue light material and the ESIPT yellow light material is blocked, complementary color host-guest light emitting peaks are regulated and controlled through the doping proportion, and the white light OLED device which is low in cost, capable of being prepared repeatedly, efficient, stable in EL spectrum and adjustable in chromaticity is prepared.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescent materials, and in particular relates to an ESIPT luminescent material with high exciton utilization rate and its preparation method and application. Background technique [0002] With the rapid development of organic electronics and the market requirements for large-area, ultra-thin and flexible solid-state lighting and information display technologies, organic light-emitting diodes (Organic Light-Emitting Diode, OLED) have all-solid-state, A series of advantages such as active light emission, high efficiency, energy saving, fast response, wide viewing angle, light and thin, large-area manufacturing and flexible display have attracted the attention of the scientific community. And with the development in recent decades, it has entered the commercialization stage, and is widely used in a series of display terminals such as mobile phones, tablets, and TVs, and gradually replaces t...

Claims

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Application Information

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IPC IPC(8): C07D417/14C09K11/06H01L51/50H01L51/54
CPCC07D417/14C09K11/06C09K2211/1037C09K2211/1029C09K2211/1025H10K85/657H10K85/6572H10K50/11Y02B20/00
Inventor 钱妍杨涛密保秀高志强蒋鑫晨张宏梅
Owner NANJING UNIV OF POSTS & TELECOMM
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