CAJ | 학술논문

用简易的溶液化学方法合成了胶体Cu2 CdSnS4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.
용간역적용액화학방법합성료효체Cu2 CdSnS4납미정.투사전자현미경(TEM),소묘전자현미경(SEM),능보(EDS),X사선연사(XRD),X사선광전자보(XPS)화UV-vis-NIR흡수광보측시표명Cu2CdSnS4효체납미정구유균일적척촌분포화량호적결정성,병구유사면체결구.납미정중Cu/Cd/Sn/S적화학계량비약위2.07:0.75:1.26:3.92,Cu、Cd、Sn화S사충원소적화학태분별위+1、+2、+4화-2개,여Cu2CdSnS4분자식중적화학태일치.통과외추법고산Cu2CdSnS4납미정적금대관도위～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 Cu2 CdSnS4 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 Cu2 CdSnS4 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.