Electroluminescent element

JP7863348B2Active Publication Date: 2026-05-21BEIJING XIAHE TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
BEIJING XIAHE TECHNOLOGY CO LTD
Filing Date
2023-12-26
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

Existing phosphorescent OLEDs face challenges such as unsaturated blue light emission, short lifespan, high operating voltage, and efficiency degradation at high brightness, particularly in achieving a more saturated emission spectrum and longer device lifespan.

Method used

A novel electroluminescent device comprising a specific combination of a first metal complex with a ligand structure represented by formula 1, a first compound with structure represented by formula 2 or 3, and a second compound with structure represented by formula 4, used in the light-emitting layer to enhance efficiency and extend service life.

Benefits of technology

The novel material combination achieves higher efficiency and significantly improves the service life of the electroluminescent device, providing better device performance.

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Patent Text Reader

Abstract

To provide an organic electroluminescent element having a novel combination of materials.SOLUTION: A positive electrode, a negative electrode, and an organic layer between the positive electrode and the negative electrode include a first metal complex including a ligand having a structure expressed by Formula 1, a first compound having a structure expressed by Formula 2 or Formula 3, and a second compound having a structure expressed by Formula 4. The electroluminescent element presents a higher efficiency and a longer active durable life. A compound composition includes the first metal complex including a ligand with a structure expressed by Formula 1, the first compound having a structure expressed by Formula 2 or Formula 3, and the second compound having a structure expressed by Formula 4.SELECTED DRAWING: Figure 1
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