Photoluminescence of Nominally Undoped Heavy n-Type ZnO Nanowires
TANG Hai-Ping1,2, HE Hai-Ping3**, LIU Chao3, KWON Bong-Jun1, YE Zhi-Zhen3, LEE Soonil1, PARK Ji-Yong1***
1Division of Energy Systems Research, Ajou University, Suwon, 443-749, Korea 2Baoji University of Arts and Sciences, Baoji 721007 3State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027
Photoluminescence of Nominally Undoped Heavy n-Type ZnO Nanowires
TANG Hai-Ping1,2, HE Hai-Ping3**, LIU Chao3, KWON Bong-Jun1, YE Zhi-Zhen3, LEE Soonil1, PARK Ji-Yong1***
1Division of Energy Systems Research, Ajou University, Suwon, 443-749, Korea 2Baoji University of Arts and Sciences, Baoji 721007 3State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027
摘要We report the identification of a donor band and the correlation between n-type conductivity and the green emission in ZnO nanowires. Temperature-dependent photoluminescence is used to investigate nominally undoped ZnO nanowires with high n-type conductivity. Within the whole temperature range, a dominant free-to-bound transition with a donor band of about 150 meV below the conduction band minimum is observed. The nanowires show very strong green emission, which is quenched with activation energy of about 220 meV. The correlation between the high n-type conductivity and the strong green emission is discussed in detail, and we suggest that they may have different origins.
Abstract：We report the identification of a donor band and the correlation between n-type conductivity and the green emission in ZnO nanowires. Temperature-dependent photoluminescence is used to investigate nominally undoped ZnO nanowires with high n-type conductivity. Within the whole temperature range, a dominant free-to-bound transition with a donor band of about 150 meV below the conduction band minimum is observed. The nanowires show very strong green emission, which is quenched with activation energy of about 220 meV. The correlation between the high n-type conductivity and the strong green emission is discussed in detail, and we suggest that they may have different origins.
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