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Issue 3, 2015
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Cooperative kinetics of depolarization in CH3NH3PbI3 perovskite solar cells

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Abstract

Despite the large photovoltaic performance recently achieved, many aspects of the working principles of hybrid organic–inorganic perovskite solar cells remain to be unveiled. We analyze the experimental features observed in the decay of photovoltage and provide an interpretation of the different depolarization regimes at distinct time scales. We introduce an instantaneous relaxation time that shows the type of relaxation for each separate mechanism. The decay of photovoltage is characterized by electronic events at the ms time scale followed by a power law relaxation in the 10–100 s time window. The latter process is associated with the slow dielectric relaxation of CH3NH3PbI3 perovskite and it points to cooperative kinetics of polarization and depolarization of ferroelectric domains. These findings provide an important tool for interpretation of kinetic features in the perovskite ferroic solar cells.

Graphical abstract: Cooperative kinetics of depolarization in CH3NH3PbI3 perovskite solar cells

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Publication details

The article was received on 07 Oct 2014, accepted on 14 Jan 2015 and first published on 14 Jan 2015


Article type: Communication
DOI: 10.1039/C4EE03171G
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Citation: Energy Environ. Sci., 2015,8, 910-915

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    Cooperative kinetics of depolarization in CH3NH3PbI3 perovskite solar cells

    L. Bertoluzzi, R. S. Sanchez, L. Liu, J. Lee, E. Mas-Marza, H. Han, N. Park, I. Mora-Sero and J. Bisquert, Energy Environ. Sci., 2015, 8, 910
    DOI: 10.1039/C4EE03171G

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