Composite film, preparation method thereof and luminescent device

By using a composite film of carrier transport material and inorganic nanomaterial in the electron transport layer, the problem of difficulty in preparing electron transport layer in the solution method is solved, and good energy level ladder and improved device performance are achieved.

CN119730577APending Publication Date: 2025-03-28GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
0 Cites 0 Cited by

Patent Information

Application Number
CN202311253466.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-26
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

There are large electron injection barriers in the LUMO energy level of the electron transport layer prepared by the solution method and the LUMO energy level of the high-work function metal electrode, which leads to difficulties in electron injection.

Method used

A composite film is used, which consists of carrier transport material and inorganic nanomaterials, and is prepared by solution method to form a good energy step and improve the carrier injection capacity.

Benefits of technology

By forming a good energy level ladder, the carrier injection capacity is improved, the device performance is improved, while the preparation process is simplified and energy consumption is reduced.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention belongs to the technical field of display, and relates to a composite film which comprises a first film and a second film, the first film is prepared from first ink, and the first ink comprises a carrier transport material and a first solvent; the second film is prepared from second ink, and the second ink comprises an inorganic nano material and a second solvent; wherein the LUMO (lowest unoccupied molecular orbital) energy level of the inorganic nano material is lower than that of the carrier transport material. The invention also relates to a preparation method of the composite film and a light-emitting device. According to the technical scheme provided by the invention, performance energy level steps can be realized, and the carrier injection capability is improved.
Need to check novelty before this filing date? Find Prior Art