Compound, electron-blocking material, light-emitting material, organic electroluminescent device, and display device
By using compounds containing silicon groups, carbazole groups, and dibenzofuran or dibenzothiophene groups as luminescent and electron-blocking materials in blue OLED devices, the problems of color saturation, lifespan, and voltage in blue phosphorescent OLED devices have been solved, achieving high-efficiency luminescence and improved stability.
CN122255169APending Publication Date: 2026-06-23HUAWEI TECH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUAWEI TECH CO LTD
- Filing Date
- 2024-12-19
- Publication Date
- 2026-06-23
AI Technical Summary
Technical Problem
Existing blue phosphorescent OLED devices suffer from problems such as poor color saturation, short device lifespan, and high operating voltage.
Method used
A compound is provided containing a silicon group, a carbazole group, and a dibenzofuran or dibenzothiophene group, which is used as a light-emitting material and an electron blocking material in a blue OLED device, and is used in a blue light-emitting layer, an electron blocking layer, or a light-emitting auxiliary layer to synergistically improve device performance.
Benefits of technology
It improves the luminous efficiency, color saturation, and device lifespan of blue OLED devices, reduces the operating voltage, and improves charge transport balance and device stability.
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Figure CN122255169A_ABST
Abstract
The present disclosure discloses a compound, an electron blocking material, a light-emitting material, an organic electroluminescent device and a display device, and belongs to the technical field of display. The chemical structural formula of the compound is as follows: Ar1 includes a carbazole group, Ar2 includes a dibenzofuran group or a dibenzothiophene group. R1, R2 and R3 are selected from hydrogen, deuterium, halogen, C1-C20 alkyl, C3-C20 cycloalkyl, C1-C20 heteroalkyl, C7-C30 aralkyl, C1-C20 alkoxy, C6-C30 aryloxy, C2-C20 alkenyl, C6-C20 aryl, C3-C20 heteroaryl, C3-C20 alkylsilyl, C6-C20 arylsilyl, and C0-C20 amine, acyl, carbonyl, carboxyl, ester, nitrile, isonitrile, sulfur, sulfonyl or phosphine, so as to improve the luminous efficiency, color saturation, service life of the OLED device and reduce the working voltage.
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