利用偏钨酸铵的DMF/水溶液旋涂热解制备WO3薄膜及其在钙钛矿太阳电池致密层中的应用

本文首次通过旋涂热解偏钨酸铵((NH₄)₆H₂W₁₂O₄₀)的DMF/水溶液成功制备了致密的三氧化钨(WO₃)薄膜, 系统研究了WO₃薄膜厚度及用异丙醇冲洗处理气相辅助溶液法制备的CH₃NH₃PbI₃薄膜对相应钙钛矿太阳电池光伏性能的影响. 结果表明, 使用厚度为62nmWO₃致密层的平板钙钛矿太阳电池获得了短路电流密度17.39 mA.cm_-2, 开路电压0.58 V, 填充因子0.57, 相应光电转化效率5.72%. 使用异丙醇冲洗CH₃NH₃PbI₃薄膜后, 相应太阳电池的光电转化效率由5.72 % 升高到7.04 %.

Pyrolysis preparation of WO3 thin films using ammonium metatungstate DMF/water solution for efficient compact layers in planar perovskite solar cells

The tungsten trioxide(WO₃) thin films were firstly prepared by spin-coating-pyrolysis methods using the ammonium metatungstate((NH₄)₆H₂W₁₂O₄₀) DMF/water solution, and successfully applied as the efficient compact layers for the planar perovskite solar cells. The influence of the WO₃ film thickness and the rinsing treatment of CH₃NH₃PbI₃ thin film with isopropanol on the photovoltaic performance of the corresponding perovskite solar cells was systematically investigated. The results revealed that the perovskite solar cell with a 62 nm thick WO₃ compact layer achieved a photoelectric conversion efficiency of 5.72%, with a short circuit photocurrent density of 17.39 mA/cm², an open circuit voltage of 0.58 V and a fill factor of 0.57. The photoelectric conversion efficiency was improved from 5.72% to 7.04% by the isopropanol rinsing treatment.