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胶体Cu2CdSnS4纳米晶的合成与其性质研究

Synthesis and properties of colloidal Cu2CdSnS4 nanocrystals

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摘要

用简易的溶液化学方法合成了胶体Cu2CdSnS4纳米晶.透射电子显微镜(TEM),扫描电子显微镜(SEM),能谱(EDS),X射线衍射(XRD),X射线光电子谱(XPS)和UV-vis-NIR吸收光谱测试表明Cu2CdSnS4胶体纳米晶具有均一的尺寸分布和良好的结晶性,并具有四面体结构.纳米晶中Cu/Cd/Sn/S的化学计量比约为2.07:0.75:1.26:3.92,Cu、Cd、Sn和S四种元素的化学态分别为+1、+2、+4和-2价,与Cu2CdSnS4分子式中的化学态一致.通过外推法估算Cu2CdSnS4纳米晶的禁带宽度为~1.3 eV.

Abstract

Colloidal Cu2CdSnS4 nanocrystals were synthesized by a facile solution chemistry method. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV-vis-NIR absorbance spectroscopy measurements indicated that the Cu2CdSnS4 colloidal nanocrystals have uniform size-distribution and good crystalline quality with a tetrahedral coordinated structure. The stoichiometric ratio Cu/Cd/Sn/S is about 2.07:0.75:1.26:3.92 in Cu2CdSnS4 nanocrystals, and the chemical states of Cu, Cd, Sn and S elements are of +1, +2, +4 and -2, which correspond with the states in the molecular formula of Cu2CdSnS4. The band gap of Cu2CdSnS4 nanocrystals is estimated to be ~1.3 eV by extrapolating method.

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中图分类号:TN304 +.2

基金项目:Supported by National Basic Research Program of China (No. 2010CB933700 and 2011CBA00900), STCSM (No. 09ZR1436000) and the Knowledge Innovation Program of CAS (No. KSCX2-YW-G-042)

收稿日期:2011-03-08

修改稿日期:2011-04-07

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刘玉峰:中国科学院上海技术物理研究所 红外物理国家重点实验室,上海 200083
葛美英:中国科学院上海技术物理研究所 红外物理国家重点实验室,上海 200083
罗海瀚:中国科学院上海技术物理研究所 红外物理国家重点实验室,上海 200083
孙艳:中国科学院上海技术物理研究所 红外物理国家重点实验室,上海 200083
吴杰:中国科学院上海技术物理研究所 红外物理国家重点实验室,上海 200083
戴宁:中国科学院上海技术物理研究所 红外物理国家重点实验室,上海 200083

联系人作者:LIU Yu-Feng(yfliu@mail.sitp.ac.cn)

备注:LIU Yu-Feng(1979-), male, Chifeng, China, PhD. Candidate. Research fields focus on nano-photovoltaic materials and devices.

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引用该论文

LIU Yu-Feng,GE Mei-Ying,LUO Hai-Han,SUN Yan,WU Jie,DAI Ning. Synthesis and properties of colloidal Cu2CdSnS4 nanocrystals[J]. Journal of Infrared and Millimeter Waves, 2012, 31(1): 1-4

刘玉峰,葛美英,罗海瀚,孙艳,吴杰,戴宁. 胶体Cu2CdSnS4纳米晶的合成与其性质研究[J]. 红外与毫米波学报, 2012, 31(1): 1-4

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