喷涂法是制备二氧化钛(TiO2)薄膜的常用方法之一.通过控制喷涂时间制备不同厚度纳米晶 TiO2薄膜,将其作为染料敏化电池(DSSCs)光阳极进行电池组装.通过测定光电转化效率IPCE、I-V曲线等电池性能指标探究不同厚度纳米晶 TiO2薄膜对 DSSCs 性能影响,结果发现,纳米晶 TiO2薄膜厚度增加有利于提高DSSCs 短路电流；DSSCs光电转换效率η呈现先增加后减少的趋势,当喷涂时间从2 min增加到6 min,由2．68％升高至4．48％,提高了66．76％；当喷涂时间由8 min增加至12 min,转换效率出现略微下降,上述工作的开展对于优化DSSCs的性能具有一定的现实意义.
The spraying methodwidely used in the preparation of TiO2 film.In our experiment,the TiO2 films with different thickness were prepared by controlling the spray time.The photoelectrochemical experiments were performed in a sandwich type two-electrode cell and I-V curves were obtained to investigate TiO2 film thickness on the performance of DSSCs.Result of solar cell test manifested that a enhanced short ciruit current is attributed to the increase of TiO2 film thickness,then the efficiency increases from 2.68% to 4.48%,showing a 66.76% improvement when the spraying time prolong from 2 to 6 min.Nevertheless,the efficiency displayed a small drop when we continued to increase the spraying time from 8 to 1 2 min.
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