Full-color monolithic hybrid quantum dot nanoring micro light-emitting diodes with improved efficiency using atomic layer deposition and nonradiative resonant energy transfer

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

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

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.

Original languageEnglish
Pages (from-to)416-422
Number of pages7
JournalPhotonics Research
Volume7
Issue number4
DOIs
StatePublished - 1 Apr 2019

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