Investigations of the Air Gap Embedded Green InGaN/GaN Light-Emitting Diodes
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概要
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We investigated the effect of double air gaps embedded between sapphire and undoped GaN on the strain reduction in the InGaN/GaN-based green LED structure. Selective GaN growth and electrochemical etching were exploited to achieve embedded air gaps. Raman spectroscopy and photoluminescence were employed to demonstrate the relation between strain relaxation and indium incorporation. The double air gaps caused strain relaxation and led to a higher In incorporation in InGaN layers, which in turn caused a redshift of the PL spectra. As a result, three different peak wavelengths according to the existence of air gaps were observed.
- 2013-07-25
著者
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Kim Young
Semiconductor Materials And Devices Lab Korea Institute Of Science And Technology
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Hong Chang-hee
Semiconductor Physics Research Center And Department Of Semiconductor Science And Technology Chonbuk
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Park Young
Semicondactor Materials Laboratory Korea Insrirute Of Science And Technology
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SUH Eun-Kyung
Semiconductor Physics Research Center and Department of Physics, Jeonbuk National University
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SONG Jung-Hoon
Department of Physics, Kongju National University
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Katharria Yashpal
Semiconductor Physics Research Center, School of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea
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Kim Hyun
Semiconductor Physics Research Center, School of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea
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Han Nam
Semiconductor Physics Research Center, School of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea
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Han Min
Semiconductor Physics Research Center, School of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea
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Ryu Beo
Semiconductor Physics Research Center, School of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea
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Ko Kang
Semiconductor Physics Research Center, School of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea
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Yang Jong
Semiconductor Physics Research Center, School of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea
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Kim Young
Semiconductor Physics Research Center, School of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea
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Hong Chang-Hee
Semiconductor Physics Research Center, School of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea
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Song Jung-Hoon
Department of Physics, Kongju National University, Kongju, Chungnam 314-701, Republic of Korea
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