Enhancing color conversion of perovskite quantum dot-based micro-light-emitting diodes via electrochemical etching and flow chemistry system
Journal
Chemical Engineering Journal
Journal Volume
512
ISSN
1385-8947
Date Issued
2025-05
Author(s)
Wen-Tse Huang
Yen-Huei Lin
Po-Yi Tu
Loan Thi Ngo
Wei-Cheng Chen
Kai-Ling Liang
Yen-Hsiang Fang
Chaochin Su
Abstract
In response to increasing demands for displays driven by wearable devices and the metaverse, micro light-emitting diodes (micro-LEDs) have garnered significant attention. The challenges of perovskite quantum dot (PQD) stability and efficiency in color-converted micro-LEDs are addressed through material and device optimization. In this study, high-efficiency and stable PQDs are produced as a color conversion layer using a flow chemistry system. Furthermore, blue light leakage from the excitation source is mitigated by electrochemical etching of the gallium nitride (GaN) substrate, which enhances its optical density and reduces leakage, thereby improving color conversion efficiency and achieving a wide color gamut of 126% NTSC. Micro-patterned GaN substrates embedded with PQDs demonstrate the potential of micro-LED technology for commercial applications.
Subjects
Color conversion
Electrochemical etching
Flow chemistry system
micro-LED
Perovskite quantum dot
Publisher
Elsevier BV
Type
journal article