摘要
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.
SnO2 nanocrystals were synthesized, and their photolumineseenee spectra revealed the following restdts. Firstly, we found that the main emission peak of the sample grown with catalyst-assistance is the emission peak of band gap （3.68 eV）, and the photolumineseence efficiency of the crystal grown with catalyst-assistance is much higher than that without it. These results show that the quality of the crystal grown with catalyst-assistance is much improved. Furthermore, the emissions of twin-born crystal surfaces （101） and （101）T are demonstrated from the results of the deconvolution of photoluminescence spectra.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第3期1775-1778,共4页
Acta Physica Sinica
基金
国家自然科学基金(批准号:10674183)
国家重点基础研究发展计划(973)项目(批准号:2004CB719804)
广东省自然科学基金资助的课题.~~
