Determining Two-Dimensional Phosphor Surface Temperature Distribution of Phosphor-Coated LEDs Based on Hyper-Spectral Imaging

Chen Yang; Zhi-Hui Li; Zhen Li; Fang-Yuan Zhu; Hui-Min Chen; Yu-Jia Gong; Xiao-Ya Dong; Zi-Quan Guo; Guo-Long Chen; Li-Hong Zhu; Huan-Ting Chen; Jian Xu; Yuan Shi; Jie Chen; Mei-Bin Yao; Yi-Jun Lu; Zhong Chen

doi:10.1109/JEDS.2021.3111663

IEEE Journal of the Electron Devices Society (Jan 2021)

Determining Two-Dimensional Phosphor Surface Temperature Distribution of Phosphor-Coated LEDs Based on Hyper-Spectral Imaging

Chen Yang,
Zhi-Hui Li,
Zhen Li,
Fang-Yuan Zhu,
Hui-Min Chen,
Yu-Jia Gong,
Xiao-Ya Dong,
Zi-Quan Guo,
Guo-Long Chen,
Li-Hong Zhu,
Huan-Ting Chen,
Jian Xu,
Yuan Shi,
Jie Chen,
Mei-Bin Yao,
Yi-Jun Lu,
Zhong Chen

Affiliations

Chen Yang: ORCiD; Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, China
Zhi-Hui Li: Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, China
Zhen Li: Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, China
Fang-Yuan Zhu: Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, China
Hui-Min Chen: Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, China
Yu-Jia Gong: Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, China
Xiao-Ya Dong: Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, China
Zi-Quan Guo: ORCiD; Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, China
Guo-Long Chen: Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, China
Li-Hong Zhu: ORCiD; Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, China
Huan-Ting Chen: ORCiD; College of Physics and Information Engineering, Minnan Normal University, Zhangzhou, China
Jian Xu: Lab of New Energy Materials and Devices, School of Physics and Electronic Information, Henan Polytechnic University, Jiaozuo, China
Yuan Shi: Xiamen Products Quality Supervision & Inspection Institute, Xiamen, China
Jie Chen: Xiamen Hualian Electronics Corporation Ltd., Xiamen, China
Mei-Bin Yao: Fujian Science and Technology Innovation Laboratory for Energy Materials of China, Tan Kah Kee Innovation Laboratory, Xiamen, China
Yi-Jun Lu: ORCiD; Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, China
Zhong Chen: ORCiD; Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, School of Electronic Science and Engineering, National Model Microelectronics College, Xiamen University, Xiamen, China

DOI: https://doi.org/10.1109/JEDS.2021.3111663
Journal volume & issue: Vol. 9
pp. 827 – 830

Abstract

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We present a high-resolution non-contact method for the measurement of two-dimensional (2D) phosphor surface temperature distribution (PSTD) of phosphor-coated light-emitting diodes (pc-LEDs) based on advanced hyper-spectral imaging technology. The studied pc-LEDs with a surface-mounted device structure are mainly consisted of blue InGaN/GaN-based LED chips (with a spectral emission at about 456 nm), red (Sr,Ca)AlSiN3: Eu2+ phosphors (with a spectral emission at around 623 nm), and transparent silicone gels. Experimental temperature results are compared with those of micro-thermocouple ( $\mu $ -TC) and infrared thermal imaging (TI), and fairly good agreements can be noticed. However, the spatial resolution of this proposed method is more than one order of magnitude higher than that of TI method, and the proposed method provides more detailed surface temperature information of phosphors than the latter. Therefore, we believe that this proposed method can serve as useful tools for the non-contact measurement of PSTD in pc-LEDs with or without optics lens.

Published in IEEE Journal of the Electron Devices Society

ISSN: 2168-6734 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6245494

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