Implementation of high-power GaN-based LEDs with a textured 3-D backside reflector formed by inserting a self-assembled SiO2 nanosphere monolayer

Jian Kai Liou, Po Cheng Chou, Chun Chia Chen, Yu Chih Chang, Wei Chou Hsu, Shiou Ying Cheng, Jung Hui Tsai, Wen Chan Liu

研究成果: Article

5 引文 (Scopus)

摘要

Enhanced light extraction efficiency (LEE) of high-power GaN-based light-emitting diodes (LEDs) is achieved by inserting a self-assembled SiO 2 nanosphere monolayer between the substrate and backside reflectors. Due to the presence of concave surfaces and photonic crystal-like air voids, downward photons emitted from multiple quantum well toward 3-D backside reflectors, could be reflected, scattered, and redirected into arbitrary directions for light extraction. These textured 3-D backside reflectors with an SiO2 nanosphere monolayer could also extract the lateral light inside device into the normal direction and improve LEE. As compared with a conventional LED without a backside reflector and an LED with a planar hybrid backside reflector, at 350 mA, the studied device with a 3-D hybrid backside reflector exhibits 136.4% (165%) and 23.6% (27.4%) enhancements in light output power (luminous flux) without the degradation of electrical properties. Higher light intensities in light emission mapping image and far-field pattern are also obtained. These results show that a textured 3-D backside reflector could be easily formed by inserting an SiO2 nanosphere monolayer to significantly enhance the performance of high-power GaN-based LEDs.

原文English
文章編號6712052
頁(從 - 到)831-837
頁數7
期刊IEEE Transactions on Electron Devices
61
發行號3
DOIs
出版狀態Published - 2014 三月

指紋

Nanospheres
Light emitting diodes
Monolayers
High intensity light
Light emission
Photonic crystals
Semiconductor quantum wells
Electric properties
Photons
Fluxes
Degradation
Substrates
Air
Direction compound

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

引用此文

Liou, Jian Kai ; Chou, Po Cheng ; Chen, Chun Chia ; Chang, Yu Chih ; Hsu, Wei Chou ; Cheng, Shiou Ying ; Tsai, Jung Hui ; Liu, Wen Chan. / Implementation of high-power GaN-based LEDs with a textured 3-D backside reflector formed by inserting a self-assembled SiO2 nanosphere monolayer. 於: IEEE Transactions on Electron Devices. 2014 ; 卷 61, 編號 3. 頁 831-837.
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abstract = "Enhanced light extraction efficiency (LEE) of high-power GaN-based light-emitting diodes (LEDs) is achieved by inserting a self-assembled SiO 2 nanosphere monolayer between the substrate and backside reflectors. Due to the presence of concave surfaces and photonic crystal-like air voids, downward photons emitted from multiple quantum well toward 3-D backside reflectors, could be reflected, scattered, and redirected into arbitrary directions for light extraction. These textured 3-D backside reflectors with an SiO2 nanosphere monolayer could also extract the lateral light inside device into the normal direction and improve LEE. As compared with a conventional LED without a backside reflector and an LED with a planar hybrid backside reflector, at 350 mA, the studied device with a 3-D hybrid backside reflector exhibits 136.4{\%} (165{\%}) and 23.6{\%} (27.4{\%}) enhancements in light output power (luminous flux) without the degradation of electrical properties. Higher light intensities in light emission mapping image and far-field pattern are also obtained. These results show that a textured 3-D backside reflector could be easily formed by inserting an SiO2 nanosphere monolayer to significantly enhance the performance of high-power GaN-based LEDs.",
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Implementation of high-power GaN-based LEDs with a textured 3-D backside reflector formed by inserting a self-assembled SiO2 nanosphere monolayer. / Liou, Jian Kai; Chou, Po Cheng; Chen, Chun Chia; Chang, Yu Chih; Hsu, Wei Chou; Cheng, Shiou Ying; Tsai, Jung Hui; Liu, Wen Chan.

於: IEEE Transactions on Electron Devices, 卷 61, 編號 3, 6712052, 03.2014, p. 831-837.

研究成果: Article

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AU - Chou, Po Cheng

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AU - Chang, Yu Chih

AU - Hsu, Wei Chou

AU - Cheng, Shiou Ying

AU - Tsai, Jung Hui

AU - Liu, Wen Chan

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