Wen-Tse HuangYen-Huei LinPo-Yi TuLoan Thi NgoWei-Cheng ChenKai-Ling LiangYen-Hsiang FangChaochin SuRu-Shi Liu2025-05-202025-05-202025-05https://scholars.lib.ntu.edu.tw/handle/123456789/729500In 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.enColor conversionElectrochemical etchingFlow chemistry systemmicro-LEDPerovskite quantum dotjournal article10.1016/j.cej.2025.162428