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中文摘要：
采用溶剂热法合成了Cu2ZnSnS4（CZTS）纳米颗粒．利用X射线衍射（XRD）、扫描电子显微镜（SEM）、能量色散谱仪（EDS ）和透射电子显微镜（T EM ）对样品的结构、化学组成和表面形貌进行了表征．研究了反应温度和硫源对CZTS纳米颗粒的结构、组成和形貌的影响．结果表明，较低的温度下，产物以Cu-Sn-S三元相为主，随着温度升高， Zn2＋逐步扩散到晶格中，取代部分Cu2＋，形成CZTS四元相．以硫化钠作硫源，合成了组分符合计量比、分散性良好的CZTS纳米颗粒，并采用旋涂方法制备了CZTS薄膜，其光学带隙为1.49 eV ，适合作为CZTS薄膜电池的吸收层．
英文摘要：
Cu2ZnSnS4 （CZTS） nanoparticles are successfully synthesized by a facile solvothermal method . T he phase structure , composition and morphology of the nanoparticles are characterized by X-ray diffraction （ XRD ） , scan electron microscopy （ SEM ） , energy dispersive spectrometer （ EDS ） and transmission electron microscopy （T EM ） . T he effects of reactive temperature and sulfur source on the structure ,composition and morphology of CZTS particles are investigated . The results show that the Cu-Sn-S ternary phase is formed at relatively low temperature .With increasing of temperature , Zn2＋ gradually diffuses into crystal lattice and substitutes the Cu2＋ in part to form CZTS phase . The CZTS nanoparticles with near-stoichiometric composition and good dispersity are obtained by using Na 2 S as sulfur source . The CZTS thin films are prepared by spin-coating method using the synthesized CZTS nanoparticles as the raw materials . The optical gap of CZTS thin film is 1.49 eV , which is suitable for CZTS thin film solar cells as absorber layer .
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