An electron injection material and OLED organic electroluminescent device

By co-evaporating a specific electron injection material with a low work function metal to form an electron injection layer, the problem of electron-hole imbalance in OLED devices is solved, improving luminous efficiency and lifetime, and optimizing interface bonding.

CN117720557BActive Publication Date: 2026-06-16ANHUI HUAXIAN NEW MATERIAL TECH CO LTD +1
View PDF 11 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ANHUI HUAXIAN NEW MATERIAL TECH CO LTD
Filing Date
2023-12-04
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

The imbalance between electron and hole injection and transport in existing OLED devices leads to poor luminous efficiency, and the poor interfacial bonding between the metal thin layer and the organic layer affects the device lifespan.

⚗Method used

An electron injection layer is formed by co-evaporation of a specific electron injection material with a low work function metal. The stability of the metal in the electron injection layer is improved, the interface bonding is optimized, and the content of active metals is reduced by using a compound containing nitrogen atom groups to co-evaporate with the low work function metal.

🎯Benefits of technology

This improved the luminous efficiency and lifespan of OLED devices, reduced the delamination effect between the organic layer and the metal, and enhanced the overall performance of the devices.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN117720557B_ABST
    Figure CN117720557B_ABST
Patent Text Reader

Abstract

The present application relates to the technical field of organic photoelectric material preparation, and particularly relates to an electron injection material and an OLED organic electroluminescent device. The present application uses an electron injection layer material containing an N atom group as a host material, and co-evaporates with a low work function metal to form an electron injection layer. The compound containing the N atom group in the host material binds the low work function metal, thereby improving the stability of the metal in the electron injection layer, optimizing the interface bonding effect between the cathode and the electron transport layer, reducing the content of the active metal in the electron injection layer, reducing the delamination effect between the organic layer and the metal, and improving the device life and luminous efficiency.
Need to check novelty before this filing date? Find Prior Art