High-Uniform and High-Efficient Color Conversion Nanoporous GaN-Based Micro-LED Display with Embedded Quantum Dots

Yu-Ming Huang, Jo-Hsiang Chen, Yu-Hau Liou, Konthoujam James Singh, Wei-Cheng Tsai, Jung Han, Chun-Jung Lin, Tsung-Sheng Kao, Chien-Chung Lin, Shih-Chen Chen and Hao-Chung Kuo
Nanomaterials 2021, 11(10), 2696 — Published in October 2021

ABSTRACT

Quantum dot (QD)-based RGB micro-LED technology is seen as one of the most promising approaches towards full color micro-LED displays. In this work, we present a novel nanoporous GaN (NP-GaN) structure that can scatter light and host QDs, as well as a new type of micro-LED array based on an NP-GaN embedded with QDs. Compared to typical QD films, this structure can significantly enhance the light absorption and stability of QDs. As a result, the green and red QDs exhibited light conversion efficiencies of 90.3% and 96.1% respectively, leading to improvements to the luminous uniformity of the green and red subpixels by 90.7% and 91.2% respectively. This study provides a viable pathway to develop high-uniform and high-efficient color conversion micro-LED displays.

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