Hole and Interface Traps in Mg-doped Al_<0.1>Ga_<0.9>N/GaN Grown by Metalorganic Chemical Vapor Deposition(Electrical Properties of Condensed Matter)
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概要
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Deep level traps in Mg-doped Al_<0.1>Ga_<0.9>N/undoped GaN heterostructures grown by metalorganic vapor deposition with different Cp_2Mg molar flow rates are studied by deep level transient spectroscopy (DLTS). Two distinct hole traps were observed, one with an activation energy of O.18eV (AD1) and the other with an activation energy of 0.88eV (AD2) above the valence band maximum. From an analysis of the voltage dependence of DLTS spectra, the AD1 trap is associated with a defect in the Al_<0.1>Ga_<0.9>N/GaN interface based on the Poole-Frenkel model to interpret the enhancement of the thermal emission rate due to potential barrier lowering. The DLTS peak intensity of the AD2 trap steadily decreases with decreasing the Cp_2Mg molar flow rate. It appears that the AD2 hole trap is strongly related to Mg-related deep levels, which contribute to the strong blue emission observed by photoluminescence measurements.
- 社団法人応用物理学会の論文
- 2002-01-15
著者
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Lee H
Chonbuk National Univ. Chonju Kor
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LEE Hyung
Semiconductor Physics Research Center, Department of Semiconductor Science and Technology, Chonbuk N
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Lee Hyung
Semiconductor Physics Research Center And Department Of Semiconductor Science And Technology Chonbuk
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Suh Eun-kyung
Semiconductor Physics Research Center And Department Of Semiconductor Science And Technology Chonbuk
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HONG Chang-Hee
Semiconductor Physics Research Center and Department of Semiconductor Science and Technology, Chonbu
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CHO Hyun
Semiconductor Physics Research Center and Department of Semiconductor Science and Technology, Chonbu
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Hong Chang-hee
Semiconductor Physics Research Center And Department Of Semiconductor Science And Technology Chonbuk
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Cho Hyun
Semiconductor Physics Research Center And Department Of Semiconductor Science And Technology Chonbuk
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Cho Hyun
Semiconductor Physics Research Center And Department Of Semiconductor Science And Technology Chonbuk
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SUH Eun-Kyung
Semiconductor Physics Research Center and Department of Physics, Jeonbuk National University
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