电泳沉积制备TiO_(2)纳米片作为钙钛矿太阳电池缓冲层

Electrophoretic Deposition Preparation of TiO_(2) Nanotubes as Perovskite Solar Battery Buffer Layer

有机-无机杂化钙钛矿太阳电池自诞生以来,经过十几年的探索与发展,其认证效率由最初的3.8%发展为25.2%。界面问题一直是提升器件光电转换效率的关键。利用电泳沉积法制备TiO_(2)薄膜,以TiO_(2)纳米片为缓冲层制备钙钛矿太阳电池,研究TiO_(2)缓冲层对钙钛矿太阳电池(PSCs)的光电转换效率及载流子运输的影响。结果表明,相对于未加入缓冲层的PSCs,电池的光电转换效率由10.78%提升至12.71%。TiO_(2)缓冲层的加入有效地改善了界面接触问题,降低了电荷转移时的电阻,促进了载流子的运输,明显提高了钙钛矿太阳电池的光伏性能。

Since the birth of organic-inorganic hybrid perovskite solar cells,after more than ten years of exploration and development,the certification efficiency of the perovskite solar cells has increased from 3.8%to 25.2%.Interface problem is always the key to improve the photoelectric conversion efficiency of devices.In this paper,TiO_(2) thin films were prepared by electrophoretic deposition method,and perovskite solar cells were prepared by using TiO_(2) nanosheets as buffer layer.The effects of TiO_(2) buffer layer on the photoelectric conversion efficiency and carrier transport of perovskite solar cells(PSCs)were studied.The results show that compared with PSCs without buffer layer,the photoelectric conversion efficiency of the cell is increased from 10.78%to 12.71%.The addition of TiO_(2)buffer layer can effectively improve the interface contact problem,reduce the resistance of charge transfer,and promote the transport of charge carriers.The photovoltaic performance of perovskite solar cells is improved obviously.