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; Hao-Chung Kuo

doi:10.3390/nano11102696

Nanomaterials (Oct 2021)

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,
Hao-Chung Kuo

Affiliations

Yu-Ming Huang: Department of Photonics, Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
Jo-Hsiang Chen: Department of Photonics, Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
Yu-Hau Liou: Department of Photonics, Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
Konthoujam James Singh: Department of Photonics, Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
Wei-Cheng Tsai: Department of Photonics, Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
Jung Han: Department of Electrical Engineering, Yale University, New Haven, CT 06520, USA
Chun-Jung Lin: Department of Photonics, Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
Tsung-Sheng Kao: Department of Photonics, Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
Chien-Chung Lin: Institute of Photonic System, National Yang Ming Chiao Tung University, Tainan 71150, Taiwan
Shih-Chen Chen: Semiconductor Research Center, Hon Hai Research Institute, Taipei 11492, Taiwan
Hao-Chung Kuo: Department of Photonics, Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan

DOI: https://doi.org/10.3390/nano11102696
Journal volume & issue: Vol. 11, no. 10
p. 2696

Abstract

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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.

Published in Nanomaterials

ISSN: 2079-4991 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: https://www.mdpi.com/journal/nanomaterials

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