Organic thermally induced delayed fluorescent material based on pyrazine acceptor and its preparation method and application

A thermally induced delayed fluorescence, organic technology, applied in the direction of luminescent materials, organic chemistry, chemical instruments and methods, etc., can solve the problems of reducing radiation attenuation rate, reducing oscillation intensity, etc., to achieve improved emission efficiency, good thermal stability, and wide application The effect of applying the foreground

Active Publication Date: 2022-06-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Connecting the electron donor (D) unit to the electron acceptor (A) unit via a highly twisted bridge to break their conjugation can effectively reduce ΔEst, but the weakened D–A connection also reduces the oscillation strength (fs) and Reduce radiation decay rate

Method used

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  • Organic thermally induced delayed fluorescent material based on pyrazine acceptor and its preparation method and application
  • Organic thermally induced delayed fluorescent material based on pyrazine acceptor and its preparation method and application
  • Organic thermally induced delayed fluorescent material based on pyrazine acceptor and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070]

[0072]

[0076]

[0082] In this embodiment, the mass ratios of the organic thermally induced delayed fluorescent materials prepared respectively are 0.4%, 0.7%, 2% and

[0084]

Embodiment 2

[0087]

[0089]

[0098] In this example, the proportions of the organic thermally induced delayed fluorescent materials are respectively 1%, 1.5%, 2.4% and 3%.

[0100]

Embodiment 3

[0103]

[0105]

[0109]

[0115] In this example, light-emitting layers with organic thermally induced delayed fluorescent materials accounting for 5%, 10%, and 15% were prepared, respectively.

[0117]

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Abstract

The pyrazine acceptor-based organic thermally delayed fluorescent material and its preparation method and application provided by the present invention belong to the technical field of organic light-emitting diodes. With pyrazine acceptor as the core, four kinds of organic thermally delayed fluorescent materials are synthesized, and according to different The organic thermally induced delayed fluorescent material provides a corresponding organic electroluminescent device containing an organic thermally induced delayed fluorescent material based on a pyrazine acceptor; the organic thermally induced delayed fluorescent material obtained in the present invention has a smaller ΔEst and a larger f , showing good TADF characteristics, and the pyrazine structural unit has a certain rigidity, which can well suppress the non-radiative transition and improve the emission efficiency of orange / red light. It has broad application prospects and is expected to be widely used in the fields of flat panel display and solid-state lighting.

Description

Organic thermally induced delayed fluorescent material based on pyrazine acceptor and preparation method and application technical field The invention belongs to the technical field of organic light-emitting diodes, be specifically related to the organic thermally induced delayed fluorescence based on pyrazine acceptor Optical material and preparation method and application. Background technique Organic Light Emitting Diode (OLED) is also known as Organic Light Emitting Device (Organic Light Emitting Device) or organic electroluminescent device (Organic Electroluminescent Device). organic electroluminescence Small organic molecules, metal-organic complex molecules or polymer molecular light-emitting materials convert electrical energy under the action of a forward-biased electric field. A luminous phenomenon that is directly converted into light energy. OLEDs are not only self-illuminating, backlight-free, and energy-efficient, they are also responsive High speed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D413/14C09K11/06H01L51/50H01L51/54
CPCC07D413/14C09K11/06C09K2211/1033C09K2211/1044C09K2211/1014C09K2211/1007H10K85/636H10K85/633H10K85/657H10K85/6572H10K50/11Y02E10/549
Inventor 郑才俊蒲春鹏银培峰
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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