CH3NH3PbI3 and CH3NH3PbI3鈥?i>xClx in Planar or Mesoporous Perovskite Solar Cells: Comprehensive Insight into the

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• 作者：Yantao Shi ; Yujin Xing ; Yu Li ; Qingshun Dong ; Kai Wang ; Yi Du ; Xiaogong Bai ; Shufeng Wang ; Zhijian Chen ; Tingli Ma
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：July 16, 2015
• 年：2015
• 卷：119
• 期：28
• 页码：15868-15873
• 全文大小：384K
• ISSN：1932-7455

文摘

In perovskite solar cells (PSCs), issues of compatibility between the photoabsorber and the cell architecture arise. In this work, we systematically demonstrated the characteristics of PSCs with an organometal halide, CH₃NH₃PbI₃ or CH₃NH₃PbI_3鈥?i>xCl_x, in a planar or mesoporous architecture, and the dependence of the cell photovoltaic performance on the architecture was illustrated in detail. In addition to the inherent photoelectric characteristics, CH₃NH₃PbI₃ and CH₃NH₃PbI_3鈥?i>xCl_x also differ in other aspects, such as light absorption, crystallinity, surface coverage, and dissociation of the photogenerated electrons. For PSCs with CH₃NH₃PbI₃, the mesoporous ones gave high power conversion efficiencies (PCE) of up to 14.05%, which is much higher than those of the planar ones (up to 6.76%). For PSCs with CH₃NH₃PbI_3鈥?i>xCl_x, the planar and mesoporous devices exhibited PCEs of up to 12.67% and 7.87%, respectively, quite in contrast with the case of CH₃NH₃PbI₃.