Influence of wafer quality on chip size-dependent efficiency variation in blue and green micro light-emitting diodes

We propose a key factor associated with both surface recombination velocity and radiative efficiency of an LED to estimate its chip size-dependent radiative efficiencies. The validity of the suggested factor is verified through experimental comparison between various LED wafers. Efficiencies of micr...

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Autores principales: Woo, Kie Young, Song, Hyun Gyu, Lee, Kwanjae, Sim, Young Chul, Cho, Yong-Hoon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9106711/
https://www.ncbi.nlm.nih.gov/pubmed/35562422
http://dx.doi.org/10.1038/s41598-022-12169-6
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author Woo, Kie Young
Song, Hyun Gyu
Lee, Kwanjae
Sim, Young Chul
Cho, Yong-Hoon
author_facet Woo, Kie Young
Song, Hyun Gyu
Lee, Kwanjae
Sim, Young Chul
Cho, Yong-Hoon
author_sort Woo, Kie Young
collection PubMed
description We propose a key factor associated with both surface recombination velocity and radiative efficiency of an LED to estimate its chip size-dependent radiative efficiencies. The validity of the suggested factor is verified through experimental comparison between various LED wafers. Efficiencies of micro-LEDs from a blue and two green LED wafers are examined by temperature-dependent photoluminescence experiments. Surface recombination velocities are extracted from chip size dependent time-resolved PL results. Possible explanations on the reason why two green wafers show different properties are also given. With the suggested factor, we can provide more accurate prediction on the chip size-dependent efficiency of an LED wafer.
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spelling pubmed-91067112022-05-15 Influence of wafer quality on chip size-dependent efficiency variation in blue and green micro light-emitting diodes Woo, Kie Young Song, Hyun Gyu Lee, Kwanjae Sim, Young Chul Cho, Yong-Hoon Sci Rep Article We propose a key factor associated with both surface recombination velocity and radiative efficiency of an LED to estimate its chip size-dependent radiative efficiencies. The validity of the suggested factor is verified through experimental comparison between various LED wafers. Efficiencies of micro-LEDs from a blue and two green LED wafers are examined by temperature-dependent photoluminescence experiments. Surface recombination velocities are extracted from chip size dependent time-resolved PL results. Possible explanations on the reason why two green wafers show different properties are also given. With the suggested factor, we can provide more accurate prediction on the chip size-dependent efficiency of an LED wafer. Nature Publishing Group UK 2022-05-13 /pmc/articles/PMC9106711/ /pubmed/35562422 http://dx.doi.org/10.1038/s41598-022-12169-6 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Woo, Kie Young
Song, Hyun Gyu
Lee, Kwanjae
Sim, Young Chul
Cho, Yong-Hoon
Influence of wafer quality on chip size-dependent efficiency variation in blue and green micro light-emitting diodes
title Influence of wafer quality on chip size-dependent efficiency variation in blue and green micro light-emitting diodes
title_full Influence of wafer quality on chip size-dependent efficiency variation in blue and green micro light-emitting diodes
title_fullStr Influence of wafer quality on chip size-dependent efficiency variation in blue and green micro light-emitting diodes
title_full_unstemmed Influence of wafer quality on chip size-dependent efficiency variation in blue and green micro light-emitting diodes
title_short Influence of wafer quality on chip size-dependent efficiency variation in blue and green micro light-emitting diodes
title_sort influence of wafer quality on chip size-dependent efficiency variation in blue and green micro light-emitting diodes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9106711/
https://www.ncbi.nlm.nih.gov/pubmed/35562422
http://dx.doi.org/10.1038/s41598-022-12169-6
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