Machine vision inspection of early failure and line-shaped defects of blue InGaN/GaN light emitting diodes soaked in liquid nitrogen for cryogenic tests
Cryogenic tests were conducted on blue InGaN/GaN light-emitting diodes (LEDs) by immersing the device in liquid nitrogen (LN2). To study the degradation of the LEDs, a combination of optical, electrical, and material characterizations were performed on the LN2-soaked device. The results indicate tha...
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ftdoajarticles:oai:doaj.org/article:55e0b0b5a5d04e1c8d8458d8df67ad43 2023-07-02T03:31:29+02:00 Machine vision inspection of early failure and line-shaped defects of blue InGaN/GaN light emitting diodes soaked in liquid nitrogen for cryogenic tests Chun-Yen Yang Chih-Yuan Yu You-Li Lin Mou-Tuong Hon Shao-Jui Yang Yi-Zong Zhang Hsuan-Chia Kang Yaw-Wen Kuo Chia-Feng Lin You-Lin Wu Hsin-Hung Chou Hsiang Chen Yung-Hui Li Jung Han 2023-07-01T00:00:00Z https://doi.org/10.1016/j.rinp.2023.106594 https://doaj.org/article/55e0b0b5a5d04e1c8d8458d8df67ad43 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S221137972300387X https://doaj.org/toc/2211-3797 2211-3797 doi:10.1016/j.rinp.2023.106594 https://doaj.org/article/55e0b0b5a5d04e1c8d8458d8df67ad43 Results in Physics, Vol 50, Iss , Pp 106594- (2023) InGaN/GaN blue LED Liquid nitrogen Machine vision Line defects Lattice deformation Physics QC1-999 article 2023 ftdoajarticles https://doi.org/10.1016/j.rinp.2023.106594 2023-06-11T00:35:20Z Cryogenic tests were conducted on blue InGaN/GaN light-emitting diodes (LEDs) by immersing the device in liquid nitrogen (LN2). To study the degradation of the LEDs, a combination of optical, electrical, and material characterizations were performed on the LN2-soaked device. The results indicate that noticeable emission spectral shifts were observed during the LED immersion due to lattice deformation. Moreover, clustering of cracks was generated in the cross-section, and line-shaped defects appeared on the surface of the GaN LED, which was different from the defects on AlInGaP LEDs after LN2 immersion. To track the trend of device damage, computer-assisted OpenCV-Python software was used to zoom in on nuanced variations in certain areas of the emission images. Early degradation of certain areas can be detected by computer-assisted machine vision, which has the potential to provide an early warning and protective circuits for the system consisting of the initial degraded LEDs. Reliability studies on LN2-soaked InGaN/GaN LEDs show promise in studying the reliability issues of GaN device applications in Arctic regions and space exploration. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Results in Physics 50 106594 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
InGaN/GaN blue LED Liquid nitrogen Machine vision Line defects Lattice deformation Physics QC1-999 |
spellingShingle |
InGaN/GaN blue LED Liquid nitrogen Machine vision Line defects Lattice deformation Physics QC1-999 Chun-Yen Yang Chih-Yuan Yu You-Li Lin Mou-Tuong Hon Shao-Jui Yang Yi-Zong Zhang Hsuan-Chia Kang Yaw-Wen Kuo Chia-Feng Lin You-Lin Wu Hsin-Hung Chou Hsiang Chen Yung-Hui Li Jung Han Machine vision inspection of early failure and line-shaped defects of blue InGaN/GaN light emitting diodes soaked in liquid nitrogen for cryogenic tests |
topic_facet |
InGaN/GaN blue LED Liquid nitrogen Machine vision Line defects Lattice deformation Physics QC1-999 |
description |
Cryogenic tests were conducted on blue InGaN/GaN light-emitting diodes (LEDs) by immersing the device in liquid nitrogen (LN2). To study the degradation of the LEDs, a combination of optical, electrical, and material characterizations were performed on the LN2-soaked device. The results indicate that noticeable emission spectral shifts were observed during the LED immersion due to lattice deformation. Moreover, clustering of cracks was generated in the cross-section, and line-shaped defects appeared on the surface of the GaN LED, which was different from the defects on AlInGaP LEDs after LN2 immersion. To track the trend of device damage, computer-assisted OpenCV-Python software was used to zoom in on nuanced variations in certain areas of the emission images. Early degradation of certain areas can be detected by computer-assisted machine vision, which has the potential to provide an early warning and protective circuits for the system consisting of the initial degraded LEDs. Reliability studies on LN2-soaked InGaN/GaN LEDs show promise in studying the reliability issues of GaN device applications in Arctic regions and space exploration. |
format |
Article in Journal/Newspaper |
author |
Chun-Yen Yang Chih-Yuan Yu You-Li Lin Mou-Tuong Hon Shao-Jui Yang Yi-Zong Zhang Hsuan-Chia Kang Yaw-Wen Kuo Chia-Feng Lin You-Lin Wu Hsin-Hung Chou Hsiang Chen Yung-Hui Li Jung Han |
author_facet |
Chun-Yen Yang Chih-Yuan Yu You-Li Lin Mou-Tuong Hon Shao-Jui Yang Yi-Zong Zhang Hsuan-Chia Kang Yaw-Wen Kuo Chia-Feng Lin You-Lin Wu Hsin-Hung Chou Hsiang Chen Yung-Hui Li Jung Han |
author_sort |
Chun-Yen Yang |
title |
Machine vision inspection of early failure and line-shaped defects of blue InGaN/GaN light emitting diodes soaked in liquid nitrogen for cryogenic tests |
title_short |
Machine vision inspection of early failure and line-shaped defects of blue InGaN/GaN light emitting diodes soaked in liquid nitrogen for cryogenic tests |
title_full |
Machine vision inspection of early failure and line-shaped defects of blue InGaN/GaN light emitting diodes soaked in liquid nitrogen for cryogenic tests |
title_fullStr |
Machine vision inspection of early failure and line-shaped defects of blue InGaN/GaN light emitting diodes soaked in liquid nitrogen for cryogenic tests |
title_full_unstemmed |
Machine vision inspection of early failure and line-shaped defects of blue InGaN/GaN light emitting diodes soaked in liquid nitrogen for cryogenic tests |
title_sort |
machine vision inspection of early failure and line-shaped defects of blue ingan/gan light emitting diodes soaked in liquid nitrogen for cryogenic tests |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://doi.org/10.1016/j.rinp.2023.106594 https://doaj.org/article/55e0b0b5a5d04e1c8d8458d8df67ad43 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Results in Physics, Vol 50, Iss , Pp 106594- (2023) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S221137972300387X https://doaj.org/toc/2211-3797 2211-3797 doi:10.1016/j.rinp.2023.106594 https://doaj.org/article/55e0b0b5a5d04e1c8d8458d8df67ad43 |
op_doi |
https://doi.org/10.1016/j.rinp.2023.106594 |
container_title |
Results in Physics |
container_volume |
50 |
container_start_page |
106594 |
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1770270871085121536 |