Nitride-based LEDs with a hybrid Al mirror +TiO 2/ SiO 2 DBR backside reflector

S. J. Chang; C. F. Shen; M. H. Hsieh; C. T. Kuo; T. K. Ko; W. S. Chen; S. C. Shei

doi:10.1109/JLT.2008.923927

Nitride-based LEDs with a hybrid Al mirror +TiO ₂/ SiO ₂ DBR backside reflector

S. J. Chang, C. F. Shen, M. H. Hsieh, C. T. Kuo, T. K. Ko, W. S. Chen, S. C. Shei

Institute of Microelectronics

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

Nitride-based light-emitting diodes (LEDs) with a hybrid backside reflector combining a TiO ₂/SiO ₂ distributed Bragg reflector (DBR) and an Al mirror were proposed and realized. It was found that we can significantly enhance the 35% reflectivity of the 2-pair TiO ₂/SiO ₂ DBR to 94% by combining with Al mirror (hybrid reflector). Furthermore, reflectivity of the proposed reflector depends only slightly on incident light wavelength and the incident angle. With 350-mA current injection, it was found that the output powers were 145.7, 178.2, and 201.9 mW for the LEDs with 2-pair DBR, with an Al mirror and with a hybrid reflector, respectively, when packaged in TO-cups. It was also found that reliability for the LED with the hybrid reflector is good.

Original language	English
Pages (from-to)	3131-3136
Number of pages	6
Journal	Journal of Lightwave Technology
Volume	26
Issue number	17
DOIs	https://doi.org/10.1109/JLT.2008.923927
Publication status	Published - 2008 Sept 1

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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10.1109/JLT.2008.923927

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title = "Nitride-based LEDs with a hybrid Al mirror +TiO 2/ SiO 2 DBR backside reflector",

abstract = "Nitride-based light-emitting diodes (LEDs) with a hybrid backside reflector combining a TiO 2/SiO 2 distributed Bragg reflector (DBR) and an Al mirror were proposed and realized. It was found that we can significantly enhance the 35% reflectivity of the 2-pair TiO 2/SiO 2 DBR to 94% by combining with Al mirror (hybrid reflector). Furthermore, reflectivity of the proposed reflector depends only slightly on incident light wavelength and the incident angle. With 350-mA current injection, it was found that the output powers were 145.7, 178.2, and 201.9 mW for the LEDs with 2-pair DBR, with an Al mirror and with a hybrid reflector, respectively, when packaged in TO-cups. It was also found that reliability for the LED with the hybrid reflector is good.",

author = "Chang, {S. J.} and Shen, {C. F.} and Hsieh, {M. H.} and Kuo, {C. T.} and Ko, {T. K.} and Chen, {W. S.} and Shei, {S. C.}",

note = "Funding Information: Manuscript received December 12, 2007; revised March 16, 2008. December 19, 2008. This work was supported in part by the Center for Frontier Materials and Micro/Nano Science and Technology, National Cheng Kung University, Taiwan (D97-2700), and in part by the Advanced Optoelectronic Technology Center, National Cheng Kung University, under projects from the Ministry of Education.",

year = "2008",

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doi = "10.1109/JLT.2008.923927",

language = "English",

volume = "26",

pages = "3131--3136",

journal = "Journal of Lightwave Technology",

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T1 - Nitride-based LEDs with a hybrid Al mirror +TiO 2/ SiO 2 DBR backside reflector

AU - Chang, S. J.

AU - Shen, C. F.

AU - Hsieh, M. H.

AU - Kuo, C. T.

AU - Ko, T. K.

AU - Chen, W. S.

AU - Shei, S. C.

N1 - Funding Information: Manuscript received December 12, 2007; revised March 16, 2008. December 19, 2008. This work was supported in part by the Center for Frontier Materials and Micro/Nano Science and Technology, National Cheng Kung University, Taiwan (D97-2700), and in part by the Advanced Optoelectronic Technology Center, National Cheng Kung University, under projects from the Ministry of Education.

PY - 2008/9/1

Y1 - 2008/9/1

N2 - Nitride-based light-emitting diodes (LEDs) with a hybrid backside reflector combining a TiO 2/SiO 2 distributed Bragg reflector (DBR) and an Al mirror were proposed and realized. It was found that we can significantly enhance the 35% reflectivity of the 2-pair TiO 2/SiO 2 DBR to 94% by combining with Al mirror (hybrid reflector). Furthermore, reflectivity of the proposed reflector depends only slightly on incident light wavelength and the incident angle. With 350-mA current injection, it was found that the output powers were 145.7, 178.2, and 201.9 mW for the LEDs with 2-pair DBR, with an Al mirror and with a hybrid reflector, respectively, when packaged in TO-cups. It was also found that reliability for the LED with the hybrid reflector is good.

AB - Nitride-based light-emitting diodes (LEDs) with a hybrid backside reflector combining a TiO 2/SiO 2 distributed Bragg reflector (DBR) and an Al mirror were proposed and realized. It was found that we can significantly enhance the 35% reflectivity of the 2-pair TiO 2/SiO 2 DBR to 94% by combining with Al mirror (hybrid reflector). Furthermore, reflectivity of the proposed reflector depends only slightly on incident light wavelength and the incident angle. With 350-mA current injection, it was found that the output powers were 145.7, 178.2, and 201.9 mW for the LEDs with 2-pair DBR, with an Al mirror and with a hybrid reflector, respectively, when packaged in TO-cups. It was also found that reliability for the LED with the hybrid reflector is good.

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Nitride-based LEDs with a hybrid Al mirror +TiO ₂/ SiO ₂ DBR backside reflector

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