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Title: Modeling of intensity-modulated photocurrent/photovoltage spectroscopy : effect of mobile ions on the dynamic response of perovskite solar cells
Authors : Bernhardsgrütter, David
Schmid, Matthias Martin
et. al : No
Published in : Journal of Physical Chemistry C
Volume(Issue) : 123
Issue : 50
Pages : 30077
Pages to: 30087
Publisher / Ed. Institution : American Chemical Society
Issue Date: 22-Nov-2019
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (publication)
Language : English
Subject (DDC) : 621.3: Electrical engineering and electronics
Abstract: Intensity-modulated photocurrent (IMPS) and photovoltage (IMVS) spectroscopy have proven to provide insight into the charge carrier dynamics of perovskite solar cells (PSCs), though the interpretation of measured spectra is not straightforward. Using a one dimensional drift-diffusion model, we investigate the effect of mobile ions on the small signal response of PSCs. The IMPS and IMVS response is derived with sinusoidal steady-state analysis (S3A) and Fourier decomposition (FD) of the transient cell response to a light intensity step. The FD-method links time and frequency domain, giving an additional perspective for the interpretation of the results at the expense of numerical efficiency. The simulated spectra are characterized by two separate arcs, where the high frequency response is attributed to the transport and recombination of electronic charges, while the low frequency peak represents the transport of ions. We show that the model is able to reproduce qualitatively measurements reported in the literature. The concepts presented in this paper are applicable for the analysis of the small signal response of any mixed ionic electronic conductor.
Further description : ​This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry: C, copyright © American Chemical Society after peer review and technical editing by the publisher.
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Publication type: Article in scientific journal
DOI : 10.1021/acs.jpcc.9b08457
ISSN: 1932-7447
Restricted until : 2020-11-23
Published as part of the ZHAW project : PV2050: Simulation and Characterization
Appears in Collections:Publikationen School of Engineering

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