Transient Response of Organo-Metal-Halide Solar Cells Analyzed by Time-Resolved Current-Voltage Measurements

The determination of the power conversion efficiency of solar cells based on organo-metal-halides is subject to an ongoing debate. As solar cell devices may exhibit very slow transient response, current-voltage scans in different directions may not be congruent, which is an effect often referred to...

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Bibliographic Details
Published in:Photonics 2015-12, Vol.2 (4), p.1101-1115
Main Authors: Christoforo, M., Hoke, Eric, McGehee, Michael, Unger, Eva
Format: Article
Language:English
Subjects:
Chemical Sciences
Electric potential
Electrical measurement
Energy conversion efficiency
Fysikalisk kemi
Halides
Hysteresis
Ion migration
Kemi
Natural Sciences
Naturvetenskap
Perovskites
Photovoltaic cells
Physical Chemistry
Polarization
Solar cells
Staircase voltammetry
Time measurement
Transient current
Voltage
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Summary:The determination of the power conversion efficiency of solar cells based on organo-metal-halides is subject to an ongoing debate. As solar cell devices may exhibit very slow transient response, current-voltage scans in different directions may not be congruent, which is an effect often referred to as hysteresis. We here discuss time-resolved current-voltage measurements as a means to evaluate appropriate delay times (voltage settling times) to be used in current-voltage measurements of solar cells. Furthermore, this method allows the analysis of transient current response to extract time constants that can be used to compare characteristic differences between devices of varying architecture types, selective contacts and changes in devices due to storage or degradation conditions.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics2041101