Cu_2ZnSnS_4纳米片阵列在量子点敏化太阳能电池对电极中的应用

Cu_2ZnSnS_4 Nanosheet Arrays as Counter Electrode Materials for Quantum Dot-sensitized Solar Cells

采用气相沉积和离子交换两步法制备Cu_2ZnSnS_4(CZTS)纳米片阵列对电极,应用于量子点敏化太阳能电池(QDSC),并考察其电催化活性和相应器件的光电性能。结果表明:所得样品是由四方晶系CZTS纳米片组装而成的阵列结构;CZTS纳米片阵列为对电极的QDSC的光电转换效率为0.80%,远高于Pt为对电极的QDSC的光电转换效率0.34%。QDSC光电性能的改善归因于CZTS纳米片阵列具有优异的电催化活性。

Cu2ZnSnS4 （CZTS） nanosheet arrays were synthesized by a two-step technique consisting of vapor deposition and ion-exchange, and used as the counter electrode in quantum dot-sensitized solar cells （QDSCs）. The electrocatalytic activity and photovoltaic performance were investigated. The results indicate that the CZTS nanosheet arrays is composed of tetragonal phase structure. The QDSCs based on CZTS counter electrode exhibit an energy conversion of 0.80%, which is greater than that based on Pt 0.34%）. The improved photovoltaic performance is attributed to the superior electrocatalytic activity of CZTS nanosheet arrays.