Facile and Scalable Fabrication of Highly Efficient Lead Iodide Perovskite Thin-Film Solar Cells in Air Using Gas Pump Method
Facile and Scalable Fabrication of Highly Efficient Lead Iodide Perovskite Thin-Film Solar Cells in Air Using Gas Pump Method
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DOI：
10.1021/acsami.6b05862
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发表时间：
2016-08-10
影响因子：
9.5
通讯作者：
Li, Changjiu
中科院分区：
文献类型：
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作者：
Ding, Bin;Gao, Lili;Li, Changjiu
控制钙钛矿膜形成过程以生产具有均匀形态、高表面覆盖率和最小针孔的高质量有机无机金属卤化物钙钛矿薄膜对于高效太阳能电池是非常重要的。在这里，我们报告了大面积光吸收钙钛矿薄膜的制造与一种新的简便和可扩展的气体泵的方法。通过降低蒸发环境中的总压力，气体泵方法可以将溶剂蒸发速率显著提高8倍，从而产生极其致密、均匀和全覆盖的钙钛矿薄膜。由此产生的平面钙钛矿太阳能电池可以实现高达19.00%的令人印象深刻的功率转换效率，对于32个面积为5 x 2 mm的器件，平均效率为17.38 +/- 0.70%，对于面积高达1.13 cm（2）的器件，平均效率为13.91%。在相对湿度为45- 55%的空气条件下，可以方便地制备钙钛矿薄膜，在大面积钙钛矿太阳能电池板的工业应用中具有良好的前景。
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 x 2 mm, 13.91% for devices with a large area up to 1.13 cm(2). 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.