胶体Cu_2CdSnS_4纳米晶的合成与其性质研究(英文)  

Synthesis and properties of colloidal Cu_2CdSnS_4 nanocrystals

作　　者：刘玉峰[1] 葛美英[1] 罗海瀚[1] 孙艳[1] 吴杰[1] 戴宁[1] 

机构地区：[1]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

出　　处：《红外与毫米波学报》2012年第1期1-4,共4页Journal of Infrared and Millimeter Waves

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

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Cu2 CdSnS4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.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.

关 键 词：胶体纳米晶 Cu2CdSnS4 光伏材料 太阳能电池 

分 类 号：TN304.2[电子电信—物理电子学]