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Compound as well as light-emitting device and display device thereof

A technology of light-emitting devices and compounds, applied in chemical instruments and methods, light-emitting materials, electric solid devices, etc., can solve the problems affecting the efficiency and life of the device, unfavorable carrier injection and transmission, and lowering the device barrier, etc., to improve the efficiency. , weakening the effect of charge transfer and narrowing the emission spectrum

Active Publication Date: 2017-11-07
WUHAN TIANMA MICRO ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In OLED devices, the luminescent material exists in the form of a solid film. Since the organic luminescent material is a large π conjugated system, it is prone to aggregation-induced fluorescence quenching (Aggregation Caused Quenching, ACQ) caused by the "π-π" stacking effect. resulting in inefficiencies
Tetraphenylethylene (TPE) is a blue-light AIE (Aggregation Induced Emission) material discovered earlier, but the efficiency of blue-light devices based on TPE is only 0.45cd / A, so how to modify TPE and design high-efficiency AIE materials still remains is a challenge
[0006] Since the current AIE materials based on tetraphenylethylene are all pure P-type, there are few bipolar (bipolar) type material designs, which are not conducive to the reduction of the potential barrier of the device and the carrier injection and transmission, thus affecting the efficiency and life of the device.

Method used

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  • Compound as well as light-emitting device and display device thereof
  • Compound as well as light-emitting device and display device thereof
  • Compound as well as light-emitting device and display device thereof

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Embodiment Construction

[0069] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0070] As the first aspect of the embodiments of the present invention, the embodiments of the present invention propose a compound whose structural formula is shown in general formula I:

[0071]

[0072] Among them, R a , R b , R c , R d each independently selected from a hydrogen atom or an electron-donating group;

[0073] R 1 selected from electron-withdrawing groups;

[0074] R 2 , R 3 each independently selected from a hydrogen atom or an electron-withdrawing group;

[0075] m, n, p, and q are each independently selected from an integer of 1-5; r, s are each independently selected from an integer of 1-4.

[0076] Generally speaking, when a substituent replaces the hydrogen on the benzene ring, the electr...

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Abstract

The invention relates to the technical field of organic light-emitting materials and in particular relates to a compound as well as a light-emitting device and a display device thereof. A structural formula of the compound is shown as a general formula I. The invention provides a TADF (Thermally Activated Delayed Fluorescence) material based on a tetraphenylethylene structure and the TADF material has TADF and AIE (Aggregation-Induced Emission) effects; a traditional fluorescent molecule transition forbidden triple-state exciton can be used for emitting light, and exciton quenching under high current density and doping concentration can also be avoided, so that the efficiency of the device can be remarkably improved. (The formula I is shown in the description.).

Description

technical field [0001] The invention relates to the technical field of organic light-emitting materials, in particular to a compound, a light-emitting device and a display device thereof. Background technique [0002] Organic electroluminescent devices (OLEDs) can be divided into fluorescent devices and phosphorescent devices according to the type of light-emitting excitons. Compared with traditional fluorescent devices that can only emit light using singlet exciton energy (25%), phosphorescent devices have a broader application prospect because they can theoretically achieve 100% internal quantum efficiency. However, phosphorescent devices are also criticized for their high cost (almost several times that of fluorescent materials) and poor stability (short lifetime) due to the presence of heavy metals. [0003] In the past two years, a new kind of luminescent material - Thermally Activated Delayed Fluorescence (TADF) material, using the principle of E-type up conversion, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D401/04C07D221/20C07D401/14C07D401/10C07D409/14C09K11/06H01L51/54H01L51/50
CPCC09K11/06C07D221/20C07D401/04C07D401/10C07D401/14C07D409/14C09K2211/1029C09K2211/1011C09K2211/1007C09K2211/1044C09K2211/1059C09K2211/1092H10K85/626H10K85/615H10K85/654H10K85/6576H10K85/6572H10K50/11
Inventor 代好张正川叶添昇
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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