Photonics Research, 2019, 7 (4): 04000416, Published Online: Apr. 11, 2019
Full-color monolithic hybrid quantum dot nanoring micro light-emitting diodes with improved efficiency using atomic layer deposition and nonradiative resonant energy transfer 
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Abstract
Full-color displays based on micro light-emitting diodes (μLEDs) can be fabricated on monolithic epitaxial wafers. Nanoring (NR) structures were fabricated on a green LED epitaxial wafer; the color of NR-μLEDs was tuned from green to blue through strain relaxation. An Al2O3 layer was deposited on the sidewall of NR-μLEDs, which improved the photoluminescence intensity by 143.7%. Coupling with the exposed multiple quantum wells through nonradiative resonant energy transfer, red quantum dots were printed to NR-μLEDs for a full-color display. To further improve the color purity of the red light, a distributed Bragg reflector is developed to reuse the excitation light.
Sung-Wen Huang Chen, Chih-Chiang Shen, Tingzhu Wu, Zhen-You Liao, Lee-Feng Chen, Jia-Rou Zhou, Chun-Fu Lee, Chih-Hao Lin, Chien-Chung Lin, Chin-Wei Sher, Po-Tsung Lee, An-Jye Tzou, Zhong Chen, Hao-Chung Kuo. Full-color monolithic hybrid quantum dot nanoring micro light-emitting diodes with improved efficiency using atomic layer deposition and nonradiative resonant energy transfer[J]. Photonics Research, 2019, 7(4): 04000416.
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