Capacitive Dark Currents, Hysteresis, and Electrode Polarization in Lead Halide Perovskite Solar Cells
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- 16 April 2015
- journal article
- research article
- Published by American Chemical Society (ACS) in The Journal of Physical Chemistry Letters
- Vol. 6 (9), 1645-1652
- https://doi.org/10.1021/acs.jpclett.5b00480
Abstract
Despite spectacular advances in conversion efficiency of perovskite solar cell many aspects of its operating modes are still poorly understood. Capacitance constitutes a key parameter to explore which mechanisms control particular functioning and undesired effects as current hysteresis. Analyzing capacitive responses allows addressing not only the nature of charge distribution in the device but also the kinetics of the charging processes and how they alter the solar cell current. Two main polarization processes are identified. Dielectric properties of the microscopic dipolar units through the orthorhombic-to-tetragonal phase transition account for the measured intermediate frequency capacitance. Electrode polarization caused by interfacial effects, presumably related to kinetically slow ions piled up in the vicinity of the outer interfaces, consistently explain the reported excess capacitance values at low frequencies. In addition, current-voltage curves and capacitive responses of perovskite-based solar cells are connected. The observed hysteretic effect in the dark current originates from the slow capacitive mechanisms.Funding Information
- Generalitat Valenciana (ISIC/2012/008)
- MINECO (Spain) (MAT2013-47192-C3-1-R)
This publication has 48 references indexed in Scilit:
- Solar cell efficiency tables (Version 45)Progress in Photovoltaics: Research and Applications, 2014
- Photoinduced Giant Dielectric Constant in Lead Halide Perovskite Solar CellsThe Journal of Physical Chemistry Letters, 2014
- Slow Dynamic Processes in Lead Halide Perovskite Solar Cells. Characteristic Times and HysteresisThe Journal of Physical Chemistry Letters, 2014
- Anomalous Hysteresis in Perovskite Solar CellsThe Journal of Physical Chemistry Letters, 2014
- Unusual defect physics in CH3NH3PbI3 perovskite solar cell absorberApplied Physics Letters, 2014
- Perovskites: The Emergence of a New Era for Low-Cost, High-Efficiency Solar CellsThe Journal of Physical Chemistry Letters, 2013
- Importance of Spin–Orbit Coupling in Hybrid Organic/Inorganic Perovskites for Photovoltaic ApplicationsThe Journal of Physical Chemistry Letters, 2013
- Solar cell efficiency tables (version 42)Progress in Photovoltaics: Research and Applications, 2013
- Organometal Perovskite Light Absorbers Toward a 20% Efficiency Low-Cost Solid-State Mesoscopic Solar CellThe Journal of Physical Chemistry Letters, 2013
- Sequential deposition as a route to high-performance perovskite-sensitized solar cellsNature, 2013