Organic light-emitting device and display or lighting device comprising same

By employing hole transport layer and light-emitting auxiliary layer materials with specific structures in organic electroluminescent devices, the problem of poor thermal stability of aromatic amine compounds has been solved, thereby improving the luminous efficiency and lifetime of the devices.

CN121021322AActive Publication Date: 2025-11-28ZHEJIANG HUAXIAN PHOTOELECTRICITY TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202511544336.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-28
Publication Date
2025-11-28
Estimated Expiration
2045-10-28

AI Technical Summary

Technical Problem

In existing organic electroluminescent devices, aromatic amine compounds, as hole transport layer materials, suffer from poor thermal stability, low HOMO value, and low triplet energy level, resulting in high driving voltage, low luminous efficiency, and short operating life.

Method used

A fluorenyl structure with fixed substitution of phenyl and alkyl groups is used as the core segment of the hole transport layer, and combined with a benzo5-membered ring and a limited substituted benzene ring as an amino side chain. With the help of a limiting material for the light-emitting auxiliary layer, an organic electroluminescent device with excellent light-emitting performance is formed.

Benefits of technology

It improves the luminous efficiency and operating life of organic light-emitting devices, reduces the driving voltage, and extends the lifespan of the devices.

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Abstract

The invention relates to the technical field of preparation of organic photoelectric materials, in particular to an organic light-emitting device and a display or lighting device comprising the organic light-emitting device. A hole transport layer compound of the device is obtained by taking a phenyl and alkyl fixed substituted fluorenyl structure as a core fragment and taking a benzo five-membered ring and a limited substituted benzene ring as two side chains of amido, and is matched with a limiting material of a light-emitting auxiliary layer to manufacture an OLED (Organic Light Emitting Diode) element; the light-emitting efficiency and the working life of the organic light-emitting device are effectively improved, and the application prospect is very good.
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