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溶胶–凝胶法制备Cu2ZnSnS4 薄膜及其太阳能电池器件

DOI: 10.14062/j.issn.0454-5648.2015.12.15

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Abstract:

以金属盐和硫脲为原料、水和乙醇的混合液为溶剂,采用溶胶–凝胶滴涂法制备出Cu2ZnSnS4(CZTS)薄膜。结果表明所得薄膜为Kesterite相CZTS纳米晶,但含有少量的SnS2杂质,薄膜中含有大量的CZTS纳米棒,薄膜组成CuZnSnS的元素摩尔比为1.61.21.03.4,为贫铜富锌比例,但存在杂质Cl–,薄膜带宽约为1.56eV。该薄膜未经硫化,即用于组装CZTS薄膜太阳能电池器件,其结构为钠钙玻璃/ITO/TiO2或ZnO/CdS/CZTS/Ag电极,器件中的TiO2和ZnO均用溶胶–凝胶法制备。器件具有光伏效应,开路电压Uoc为267mV,短路电流密度Jsc为0.025mA/cm2,填充因子fF为32%。

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