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      Anomalous Hysteresis in Perovskite Solar Cells.

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          Abstract

          Perovskite solar cells have rapidly risen to the forefront of emerging photovoltaic technologies, exhibiting rapidly rising efficiencies. This is likely to continue to rise, but in the development of these solar cells there are unusual characteristics that have arisen, specifically an anomalous hysteresis in the current-voltage curves. We identify this phenomenon and show some examples of factors that make the hysteresis more or less extreme. We also demonstrate stabilized power output under working conditions and suggest that this is a useful parameter to present, alongside the current-voltage scan derived power conversion efficiency. We hypothesize three possible origins of the effect and discuss its implications on device efficiency and future research directions. Understanding and resolving the hysteresis is essential for further progress and is likely to lead to a further step improvement in performance.

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          Author and article information

          Journal
          J Phys Chem Lett
          The journal of physical chemistry letters
          1948-7185
          1948-7185
          May 1 2014
          : 5
          : 9
          Affiliations
          [1 ] Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom.
          Article
          10.1021/jz500113x
          26270088

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