Facile and Scalable Fabrication of Highly Efficient Lead Iodide Perovskite Thin-Film Solar Cells in Air Using Gas Pump Method

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• 作者：Bin Ding ; Lili Gao ; Lusheng Liang ; Qianqian Chu ; Xiaoxuan Song ; Yan Li ; Guanjun Yang ; Bin Fan ; Mingkui Wang ; Chengxin Li ; Changjiu Li
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：August 10, 2016
• 年：2016
• 卷：8
• 期：31
• 页码：20067-20073
• 全文大小：443K
• 年卷期：0
• ISSN：1944-8252

文摘

Control of the perovskite film formation process to produce high-quality organic–inorganic metal halide perovskite thin films with uniform morphology, high surface coverage, and minimum pinholes is of great importance to highly efficient solar cells. Herein, we report on large-area light-absorbing perovskite films fabrication with a new facile and scalable gas pump method. By decreasing the total pressure in the evaporation environment, the gas pump method can significantly enhance the solvent evaporation rate by 8 times faster and thereby produce an extremely dense, uniform, and full-coverage perovskite thin film. The resulting planar perovskite solar cells can achieve an impressive power conversion efficiency up to 19.00% with an average efficiency of 17.38 ± 0.70% for 32 devices with an area of 5 × 2 mm, 13.91% for devices with a large area up to 1.13 cm². The perovskite films can be easily fabricated in air conditions with a relative humidity of 45–55%, which definitely has a promising prospect in industrial application of large-area perovskite solar panels.