Journal of Physical Chemistry Letters
Journal of Physical Chemistry Letters
4 years ago

Metal Halide Perovskites as Mixed Electronic–Ionic Conductors: Challenges and OpportunitiesFrom Hysteresis to Memristivity

Metal Halide Perovskites as Mixed Electronic–Ionic Conductors: Challenges and OpportunitiesFrom Hysteresis to Memristivity
Wolfgang Tress
Metal halide perovskites are promising candidates for many classes of different optoelectronic devices. Apart from being a semiconductor, they additionally show ionic conductivity. It expresses itself in slow response times, reversible degradation, and hysteresis in the current–voltage characteristics of solar cells. This Perspective gives a condensed overview about experiments and theory on ion migration in metal halide perovskites focusing on its effects in solar cells. Apart from being a potential stability concern for photovoltaics, ion migration paired with the excellent optoelectronic properties of this material offers opportunities for novel devices such as optically controlled memristors and switchable diodes.

Publisher URL: http://dx.doi.org/10.1021/acs.jpclett.7b00975

DOI: 10.1021/acs.jpclett.7b00975

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