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.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
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)