Light-emitting device and preparation method thereof

US12402469B2 · kind B2 · utility

Assignee

• TCL TECHNOLOGY GROUP CORPORATION · CN

Inventors

• Yinjie Song · Huizhou, CN
• Jianxin Zhang · Acton, US
• Yixing Yang · Huizhou, CN

Key dates

• Filing date: Sep 26, 2022
• Grant date: Aug 26, 2025
• Expiry date: Nov 16, 2043

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50

Abstract

A preparation method of a light-emitting device includes forming a composite transition layer between a cathode and a quantum dot light-emitting layer and forming an anode on a surface of the quantum dot light-emitting layer away from the cathode. The composite transition layer includes a first transition layer, a second transition layer, and a third transition layer. The first transition layer is arranged on one side close to the cathode and includes a metal halide. The second transition layer is arranged on a surface of the first transition layer away from the cathode and includes a hydrogen halide. The third transition layer is arranged on a surface of the second transition layer away from the first transition layer and includes an ester compound.