Metal organic material as well as preparation method and application thereof

By using tetradentate platinum (II) complex formed by platinum (II) and a special structure of tetradentate ligand, the problems of insufficient luminescence purity and insufficient device efficiency and stability of existing organic electroluminescent devices are solved, and efficient and stable luminescence performance is achieved.

CN119708070APending Publication Date: 2025-03-28HUAWEI TECH CO LTD +1
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Patent Information

Application Number
CN202311290475.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-28
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing organic electroluminescent devices based on platinum (II) organic complexes have problems such as insufficient luminescence purity and device efficiency and stability that need to be improved.

Method used

The tetradentate platinum (II) complex formed by platinum (II) and a tetradentate ligand with a special structure is used as a metal organic material. Through its strong chelation effect and planar structure, the stability and luminous efficiency of the luminescent device are improved, and the shoulder peak ratio of the molecular luminescence spectrum is reduced through a specific ligand structure, thereby improving the chromatic purity of the luminescence spectrum.

Benefits of technology

The luminescence purity, device efficiency and stability of organic electroluminescent devices are significantly improved, and high luminescence performance is achieved.

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Abstract

The embodiment of the invention provides a metal organic material, the structural formula of which is as shown in the formula (I): # imgabs0 #, in the formula (I), X1, X2, X7, X8, X9 and X10 are respectively and independently CH or N, and X3, X4, X5 and X6 are respectively and independently CH, C or N; each R1, R2, R3, R4, R5, R6 independently represents a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group, or the like; each R7 is independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group, or the like; z1 and Z2 are respectively connected with X3 and X4, or X4 and X5, or X5 and X6, one of Z1 and Z2 is a single bond, and the other is oxygen, sulfur, selenium or a divalent atomic group. The metal organic material can be applied to the organic electroluminescent device as a luminescent material, and the luminescent color purity, the device efficiency and the device stability of the organic electroluminescent device are improved.
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