采用简单的两电极电化学沉积金属薄膜技术,在镀钼的钠钙玻璃衬底上共沉积Cu-Sn层后,再沉积Zn金属层,制备出Cu-Sn-Zn金属预制层.在不同的温度下进行低温退火后,以硫粉作为硫源高温硫化金属预制层,制备出晶体质量较好的Cu2ZnSnS4 (CZTS)薄膜.通过X射线衍射仪(XRD)、扫描电镜(SEM)及能谱仪(EDS)对薄膜的晶体结构、表面形貌和薄膜组分进行分析表征,发现共沉积Cu-Sn层,再沉积Zn金属层得到的CZT预制层表面平整但晶粒尺寸较小,经过退火处理后晶粒尺寸得到改善,且硫化后所得到的CZTS薄膜不易从Mo衬底上脱落,粘附性较强.用其制备的CZTS薄膜太阳电池的开路电压Voc=569mV,短路电流密度Jsc=8.58mA/cm2,光电转换效率为1.40％.
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