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Arylamine compound, luminescent device and display device

A compound and aromatic amine technology, applied in the display field, can solve the problems of restricting the function and development of OLED, poor stability, poor energy level matching, etc., to improve mobility and thermal stability, improve luminous efficiency and life, The effect of good charge transfer capability

Pending Publication Date: 2022-06-03
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation of OLED usually adopts the method of vacuum evaporation to deposit organic materials on the substrate to form a dense thin layer. However, for the high symmetry compounds and high planarity compounds with a large number of aromatic groups currently used in OLEDs, such as For aromatic amine materials, during the evaporation process, due to serious molecular planarization and strong intermolecular forces, it is easy to form a crystalline state or molecular aggregation state on the substrate, resulting in interface degradation, device efficiency reduction, and poor stability.
In addition, the existing compounds with a large number of aromatic groups in the molecule have a high sublimation temperature, are easy to decompose during evaporation, and have a low migration rate and poor energy level matching with adjacent layers, which seriously restricts the function and development of OLEDs.

Method used

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  • Arylamine compound, luminescent device and display device
  • Arylamine compound, luminescent device and display device
  • Arylamine compound, luminescent device and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0162] A light-emitting device was fabricated in the same manner as in Comparative Example 1, except that, when the hole transport layer was formed in Example 1, compound A-3-2 was used for preparation of a hole transport layer thin film.

Embodiment 2

[0164] A light-emitting device was fabricated in the same manner as in Comparative Example 1, except that when the hole transport layer was formed in Example 2, compound A-6-4 was used for preparation of a hole transport layer thin film.

[0165] The test data of green OLED light-emitting devices are shown in the following table:

[0166] hole transport layer Voltage efficiency life Example 1 Compound A-3-2 102％ 121％ 113％ Example 2 Compound A-6-4 100％ 126％ 120％ Comparative Example 1 Ref1 100％ 100％ 100％ Comparative Example 2 Ref2 99％ 105％ 103％

[0167] It can be seen that the light-emitting devices using the compounds of the present application (with similar conclusions in blue and red light devices) have higher efficiency and lifetime, indicating that the compounds provided by the present application have higher mobility and stability. Compared with the improvement of the efficiency, the voltage has only a small inc...

Embodiment 3

[0169] A light-emitting device was fabricated in the same manner as in Comparative Example 1, except that when Ref 1 formed a hole transport layer, compound A-5-2 was used for preparation of an electron blocking layer.

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Abstract

The embodiment of the invention provides an arylamine compound, a light-emitting device and a display device. The arylamine compound has a skeleton structure as shown in a general formula I, wherein the meanings of all groups are the same as those in the specification. The arylamine compound provided by the embodiment of the invention has a good planar structure and intramolecular charge transfer capability, and is beneficial to improving mobility and thermal stability, so that the luminous efficiency of a luminescent device can be improved, and the service life of the luminescent device can be prolonged; in addition, the compound has a high triplet state energy level and is beneficial to exciton blocking, so that the luminous efficiency of the OLED device is further improved.

Description

technical field [0001] The present application relates to the field of display technology, in particular to an aromatic amine compound, a light-emitting device and a display device. Background technique [0002] Organic Light Emitting Device (OLED) has the characteristics of active light emission, high light-emitting brightness, high resolution, wide viewing angle, fast response speed, low energy consumption and flexibility, and has become a hot mainstream display product in the market. . [0003] At present, the preparation of OLED usually adopts vacuum evaporation to deposit organic materials on the substrate to form a dense thin layer. However, for the high-symmetry compounds and high-planarity compounds with a large number of aromatic groups currently used in OLEDs, such as For aromatic amine materials, during the evaporation process, due to serious molecular planarization and strong intermolecular forces, it is easy to form a crystalline state or molecular aggregation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/93C07D333/78C07D409/12C07D495/04H01L51/54H01L51/50
CPCC07D495/04C07D307/93C07D333/78C07D409/12H10K85/624H10K85/626H10K85/636H10K85/633H10K85/615H10K85/631H10K85/6576H10K85/6574H10K85/6572H10K85/657H10K50/15H10K50/18Y02E10/549
Inventor 邱丽霞孙玉倩王丹陈磊陈雪芹张东旭
Owner BOE TECH GRP CO LTD