Efficiency Improvement of UVC LEDs by Epoxy Molding Compound With Metallized Reflector

We propose an epoxy molding compound (EMC) encapsulation method based on a metallized reflector to enhance light extraction of deep ultraviolet light-emitting diodes (DUV-LEDs). From the optical simulation, the highest light output efficiency of the DUV-LEDs is measured when the angle of the metalli...

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Published in:IEEE photonics technology letters 2023-12, Vol.35 (24), p.1387-1390
Main Authors: Wan, Chuiming, Zeng, Zhaoming, Xiao, Guowei, Lan, Yian, Li, Chencheng, Lin, Hongwei, Wang, Hong
Format: Article
Language:English
Subjects:
Ceramics
deep ultraviolet light-emitting diodes (DUV-LEDs)
Electromagnetic compatibility
epoxy molding compound (EMC)
Light emitting diodes
Light extraction
metallized reflector
Metallizing
Molding compounds
Photonics
Power generation
Reliability
Substrates
Thermal resistance
Ultraviolet radiation
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cited_by cdi_FETCH-LOGICAL-c292t-df0c0995d3899f190d319beda52a3251f1c20fda64f77aa3201501031c244a953
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container_end_page 1390
container_issue 24
container_start_page 1387
container_title IEEE photonics technology letters
container_volume 35
creator Wan, Chuiming
Zeng, Zhaoming
Xiao, Guowei
Lan, Yian
Li, Chencheng
Lin, Hongwei
Wang, Hong
description We propose an epoxy molding compound (EMC) encapsulation method based on a metallized reflector to enhance light extraction of deep ultraviolet light-emitting diodes (DUV-LEDs). From the optical simulation, the highest light output efficiency of the DUV-LEDs is measured when the angle of the metallied reflector is 35° and the height is 0.5-mm. The optimized EMC structure is fabricated for application to DUV-LEDs packaging. The light output power of the EMC metallized reflector is improved by 14.3% compared to the conventional ceramic package at 20-mA. The thermal resistance of the EMC is 18.16-K/W. Furthermore, after aging tests at 60 °C and 60 °C, 90 %RH for 1000h, the relative light output power of the EMC metallized reflector is decreased by 12% and 14%, respectively.
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subjects Ceramics
deep ultraviolet light-emitting diodes (DUV-LEDs)
Electromagnetic compatibility
epoxy molding compound (EMC)
Light emitting diodes
Light extraction
metallized reflector
Metallizing
Molding compounds
Photonics
Power generation
Reliability
Substrates
Thermal resistance
Ultraviolet radiation
title Efficiency Improvement of UVC LEDs by Epoxy Molding Compound With Metallized Reflector
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