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J Phys Chem Lett. 2015 Jul 2;6(13):2452-6. doi: 10.1021/acs.jpclett.5b00968. Epub 2015 Jun 12.

How Important Is the Organic Part of Lead Halide Perovskite Photovoltaic Cells? Efficient CsPbBr3 Cells.

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Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel.


Hybrid organic-inorganic lead halide perovskite photovoltaic cells have already surpassed 20% conversion efficiency in the few years that they have been seriously studied. However, many fundamental questions still remain unanswered as to why they are so good. One of these is "Is the organic cation really necessary to obtain high quality cells?" In this study, we show that an all-inorganic version of the lead bromide perovskite material works equally well as the organic one, in particular generating the high open circuit voltages that are an important feature of these cells.


CsPbBr3; all-inorganic lead halide perovskite cells; photovoltaic cells

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