Ambient Dependence of Photoluminescence for ZnO Nanocrystalline Films Synthesized in a Sonochemical Method
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概要
- 論文の詳細を見る
We investigated the photoluminescence (PL) spectra of solution-based synthesized ZnO nanocrystalline (NC) films under various ambient conditions. While the PL spectra typically showed a sharp peak near 375 nm (near-band-edge, NBE) and a broad structure near 550 nm (deep level, DL), the NBE peak was enhanced and the DL emission was significantly suppressed in an O<sub>2</sub>-free atmosphere at room temperature. Interestingly, the PL spectra changed in an opposite manner in an O<sub>2</sub>-rich atmosphere. These findings indicate that the light emission from ZnO NC films is easily controlled by the O<sub>2</sub> concentration in the atmosphere at room temperature, which is clearly distinguished from the post-annealing effect.
- 2011-07-25
著者
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Lee Yun
Department Of Applied Chemistry Saga University
-
Lee Dong
Department Of Aerospace Engineering Chonbuk National University
-
Yee Kee
Department of Physics, Chungnam National University, Daejon 305-764, Korea
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Lee Dong
Department of Physics, Soongsil University, Seoul 156-743, Korea
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Park Jong
IT Convergence and Components and Material Research Laboratory, Electronics and Telecommunications Research Institute, Daejon 305-700, Korea
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Lee Yun
Department of Physics, Soongsil University, Seoul 156-743, Korea
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