Mixed Cation Thiocyanate-Based Pseudohalide Perovskite Solar Cells with High Efficiency and Stability

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• 作者：Yu-Hsien Chiang ; Ming-Hsien Li ; Hsin-Min Cheng ; Po-Shen Shen ; Peter Chen
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2017
• 出版时间：January 25, 2017
• 年：2017
• 卷：9
• 期：3
• 页码：2403-2409
• 全文大小：463K
• ISSN：1944-8252

文摘

Novel organic–inorganic hybrid perovskite compounds composed of mixed A-site cation (Formamidinium and Cesium) and pseudohalides (SCN and I) ions are successfully synthesized. These new classes of hybrid perovskites photovoltaics exhibited remarkable power conversion efficiency of more than 16% with excellent stability against moisture in ambient environment and under low-light storage condition. The existence of SCN^– ion inclusion is confirmed by secondary ion mass spectrometry and Fourier transform infrared spectroscopy. The SCN^–-doped pseudohalide is advantageous for the formation of large perovskite grains, as well as the performance and stability of the device.