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中国矿业大学 材料科学与工程学院, 江苏 徐州 221116
收稿:2010-08-11,
修回:2010-10-11,
网络首发:2011-03-22,
纸质出版:2011-03-22
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徐磊华, 强颖怀, 江利. SiO<sub>2</sub> 干凝胶中CdS量子点的光致发光性质[J]. 发光学报, 2011,32(3): 227-231
XU Lei-hua, QIANG Ying-huai, JIANG Li. Photoluminescent Properties of CdS Quantum Dots Doped in Silica Xerogel[J]. Chinese Journal of Luminescence, 2011,32(3): 227-231
以正硅酸乙酯(TEOS)为SiO
2
的前驱物
硝酸镉为镉源
硫脲为硫源
用溶胶-凝胶法制备了CdS量子点掺杂的SiO
2
干凝胶
利用XRD、紫外-可见吸收光谱、光致发光谱对其性质进行研究。样品的测试结果表明在SiO
2
干凝胶的网状结构中形成了CdS量子点
平均粒径为5.1 nm。SiO
2
凝胶中CdS吸收峰位置明显蓝移。在一定浓度范围内
SiO
2
干凝胶中CdS量子点的光致发光强度随着掺杂量的增大而增强
当掺杂摩尔分数达到0.5%时
其荧光增强效应达到最大;随后
其发光强度开始减弱。
paper
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