Organic electroluminescent device and display device
By using a combination of a compound with a specific aromatic ring structure and a CN group dopant as a p-type charge generation layer in an organic electroluminescent device, the problem of insufficient compound characteristics in the charge generation layer in the prior art is solved, and the operating voltage and thin-film resistance performance of the device are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NOVALED GMBH
- Filing Date
- 2024-12-09
- Publication Date
- 2026-07-17
AI Technical Summary
The performance of existing organic electroluminescent devices, especially the characteristics of compounds in the p-type charge generation layer, affects the device's operating voltage and thin-film resistance. It is necessary to improve the HOMO level, LUMO level, dipole moment, and spontaneous orientation polarization of the compounds to enhance device performance.
A composition comprising first and second organic compounds containing specific aromatic ring structures and a first organic p-doper containing at least three CN groups is used as a p-type charge generation layer to meet specific energy level differences and molecular weight requirements, and is arranged between the first luminescent layer and the second luminescent layer.
By optimizing the composition of the p-type charge generation layer, the operating voltage and thin-film resistance of organic electroluminescent devices were significantly improved, spontaneous orientation polarization was enhanced, and pixel crosstalk was reduced.
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Abstract
Citation Information
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