A condensed polycyclic compound and electroluminescent device thereof

By using thick polycyclic compounds in organic electroluminescent materials and introducing carbonyl and sulfone groups, the spectral width and efficiency roll-off problems caused by structural flexibility of existing materials are solved, and the effects of narrowing the spectrum and reducing efficiency roll-off are achieved.

CN119390712BActive Publication Date: 2025-03-25吉林省科技创新研究院
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Patent Information

Application Number
CN202510002566.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-02
Publication Date
2025-03-25
Estimated Expiration
2045-01-02

AI Technical Summary

Technical Problem

Due to the large structural flexibility and strong vibration relaxation of existing organic electroluminescent materials, the wide half-maximum of the spectrum, the low color purity, and the efficiency roll-off phenomenon occurs at high current density, which will cause the device to break down in severe cases.

Method used

The material of the luminescent layer is used to use a dense polycyclic compound. The structure introduces carbonyl and sulfone groups, which increases the spin-orbit coupling, thereby increasing the inter-reverse system jump rate and reducing the efficiency roll-off.

Benefits of technology

By using a dense polycyclic compound, the half-maximum width of the luminescence peak can be narrowed, the purity of color can be improved, and the efficiency roll-off can be significantly reduced, and the service life of the device can be extended.

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Abstract

The present invention provides a condensed polycyclic compound and an electroluminescent device thereof, belonging to the field of heterocyclic compounds, and specifically to the technical field of organic electroluminescent materials. The rigid structure vibration relaxation of the condensed polycyclic compound provided by the present invention is weakened, which can narrow the half-peak width of the luminescence peak, and at the same time, the carbonyl and sulfone groups are introduced, which can increase the spin-orbit coupling and increase the reverse intersystem crossing rate, thereby reducing the efficiency roll-off.
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