摘要
Large-scale hexagonal ZnO sheets were grown on ITO glass by cathodic electrodeposition in an aqueous zinc nitrate/potassium chloride solution at 60 °C and annealing at 350 °C for an hour. The sheets are about 3 μm in dimension and 100-300 nm in thickness. The ZnO sheets show many nano-pits on the surface and produce intense green luminescence at room temperature under femtosecond (fs) pulse ultraviolet (UV) light excitation. Both power-dependent photoluminescence spectra and time-resolved spectra were measured with varied excitation powers. Lasing phenomena occur at above 500 μJ/cm2 and the stimulated emission occurs with lifetime of less than 30 ps over 600 μJ/cm2. Additionally, the open-circuit photovoltage spectra indicate that the light-absorbing dye of RuL2(NCS)2 (N3) can be well adsorbed on the surface of ZnO sheets, which is useful for the dye-sensitized solar cells(DSSC).
源语言 | 英语 |
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页(从-至) | 2000-2003 |
页数 | 4 |
期刊 | Materials Letters |
卷 | 61 |
期 | 10 |
DOI | |
出版状态 | 已出版 - 4月 2007 |
已对外发布 | 是 |