Anomalous hysteresis in perovskite solar cells

Snaith, Henry J., Abate, Antonio, Ball, James M. , Eperon, Giles E., Leijtens, Tomas, Noel, Nakita K., Stranks, Samuel D., Wang, Jacob Tse-Wei, Wojciechowski, Konrad and Zhang, Wei (2014) Anomalous hysteresis in perovskite solar cells. The Journal of Physical Chemistry Letters, 5 (9). pp. 1511-1515. ISSN 1948-7185


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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.

Keywords:current?voltage curves, stability, hysteresis, photovoltaics, perovskite, JCNotOpen
Subjects:F Physical Sciences > F200 Materials Science
F Physical Sciences > F310 Applied Physics
Divisions:College of Science > School of Chemistry
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ID Code:22673
Deposited On:18 Mar 2016 15:09

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