Molten Salt-Assisted Growth of Perovskite Films with Submillimeter-Sized Grains

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• 作者：Yu Hou ; Hongwei Qiao ; Shuang Yang ; Chunzhong Li ; Huijun ZhaoHua Gui Yang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2017
• 出版时间：January 18, 2017
• 年：2017
• 卷：56
• 期：2
• 页码：524-529
• 全文大小：441K
• ISSN：1520-5045

文摘

Single crystalline structures with less grain boundaries and longer carrier diffusion length are essential for high performance perovskite solar cells. In this paper, we report a molten salt-assisted method to gain a perovskite film with submillimeter-sized single crystal domains by using excess ammonium salt for the first time. The resulted crystal size can reach 0.5 mm, and an aspect ratio over 1000. A photovoltaic device based on this film exhibits a champion power conversion efficiency (PCE) of 10.12%. This synthetic strategy enables the formation of submillimeter-sized perovskite films first, which holds promise for the understanding of crystallization in organic–inorganic perovskite and paves the way to enhance the efficiency of perovskite solar cells.