Cu_2ZnSnS_4纳米颗粒的溶剂热法合成及其薄膜制备研究  

Synthesis of Cu_2ZnSnS_4 nanoparticles by solvothermal method and preparation of Cu_2ZnSnS_4 thin films

作　　者：姜欣[1,2] 许炜[3] 陈建敏[1] 

机构地区：[1]中国科学院兰州化学物理研究所,甘肃兰州730000 [2]中国科学院大学,北京100049 [3]中国科学院宁波材料技术与工程研究所,浙江宁波315201

出　　处：《西北师范大学学报（自然科学版）》2014年第3期57-63,共7页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(50705093);创新群体基金资助项目(50421502);973基金资助项目(2007CB607601)

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(TEM)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1.49eV,适合作为CZTS薄膜电池的吸收层.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 .

关 键 词：CU2 ZnSnS4 纳米颗粒 溶剂热法 薄膜 

分 类 号：O648[理学—物理化学] O613.57[理学—化学]