Analysis of Size-Dependent Quantum Efficiency in AlGaInP Micro-Light-Emitting Diodes with Consideration for Current Leakage

Yi Yang Li, Fang Zhong Lin, Kuo Lin Chi, Shao Yi Weng, Guan Ying Lee, Hao Chung Kuo, Chien-Chung Lin*

*此作品的通信作者

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

This study fabricated and analyzed AlGaInP-based red micro-light-emitting diodes (LEDs) ranging from 2 to 15 μm in size. To collect photons from a single micro-LED at this scale, a solar cell chip near the micro-LEDs was used. Quantum efficiency decreased at a faster rate than that predicted by the standard ABC model under high currents, and a leakage current component was added to fully describe this phenomenon. The modified model can be used to extract valuable information regarding the micro-LEDs, such as the Shockley-Read-Hall coefficient. A size dependency analysis revealed that the bulk Shockley-Read-Hall coefficient and surface recombination velocity of the micro-LEDs were 6.81 × 107 1/sec and 5.99 × 104 cm/sec, respectively. Further analysis of the size-dependent recombination effect can help us solve the side wall problem and maximize the light output of AlGaInP-based micro-LEDs for ultrahigh-resolution displays.

原文English
期刊IEEE Photonics Journal
14
發行號1
DOIs
出版狀態Published - 1 2月 2022

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