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用热蒸发法制备了SnO2纳米结构,并用光致发光方法研究了其光谱特性.发现有催化剂条件下制备的SnO2纳米带的发光主峰为3·68eV,正对应SnO2纳米晶体的带隙能量;而无催化条件下制备的SnO2纳米晶体的发光则以氧空位、悬键和表面态发光为主.并且前者的发光效率比后者提高近两个数量级,这些实验结果说明在有催化条件下制备了高质量的SnO2纳米带.另外,对其发光光谱进行了Gauss拟合,从拟合结果发现了(101)和(101)T孪生晶面的表面态的发光峰.
The SnO2 nanostructures were prepared by thermal evaporation method and their spectral characteristics were studied by photoluminescence.The main peak of SnO2 nanoribbons prepared with the catalyst was found to be 3.68 eV, corresponding to the bandgap energy of SnO2 nanocrystals. The luminescence of SnO2 nanocrystals prepared under noncatalytic conditions is dominated by oxygen vacancies, dangling bonds and surface states, and the luminescence efficiency of the former is increased by nearly two orders of magnitude compared with the latter. These experimental results indicate that the prepared SnO2 nanocrystals High-quality SnO2 nanobelts. In addition, the luminescence spectra were Gaussian fitted, from the fitting results found (101) and (101) T twin crystal surface state of the luminescence peak.