2024-03-29T12:52:28Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/1607492024-01-09T10:08:02Zcom_10234_2507com_10234_9com_10234_160292col_10234_6973col_10234_160293
Repositori UJI
author
Guerrero, Antonio
author
Garcia-Belmonte, Germà
author
Mora-Sero, Ivan
author
Bisquert, Juan
author
Kang, Yong Soo
author
Jacobsson, T. Jesper
author
Correa-Baena, Juan-Pablo
author
Hagfeldt, Anders
2016-06-16T07:34:27Z
2016-06-16T07:34:27Z
2016
GUERRERO, Antonio, et al. Properties of Contact and Bulk Impedances in Hybrid Lead Halide Perovskite Solar Cells Including Inductive Loop Elements. The Journal of Physical Chemistry C, 2016, vol. 120, no 15, p. 8023-8032.
1932-74471932-7455
http://hdl.handle.net/10234/160749
http://dx.doi.org/10.1021/acs.jpcc.6b01728
Impedance spectroscopy offers access to all the different electronic and ionic processes taking place simultaneously in an operating solar cell. To date, its use on perovskite solar cells has been challenging because of the richness of the physical processes occurring within similar time domains. The aim of this work is to understand the general impedance response and propose a general equivalent circuit model that accounts for the different processes and gives access to quantitative analysis. When the electron-selective contacts and the thickness of the perovskite film are systematically modified, it is possible to distinguish between the characteristic impedance signals of the perovskite layer and those arising from the contacts. The study is carried out using mixed organic lead halogen perovskite (FA(0.85)MA(0.15)Pb(I0.85Br0.15)(3)) solar cells with three different electron-selective contacts: SnO2, TiO2, and Nb2O5. The contacts have been deposited by atomic layer deposition (ALD), which provides pinhole-free films and excellent thickness control in the absence of a mesoporous layer to simplify the impedance analysis. It was found that the interfacial impedance has a rich structure that reveals different capacitive processes, serial steps for electron extraction, and a prominent inductive loop related to negative capacitance at intermediate frequencies. Overall, the present report provides insights into the impedance response of perovskite solar cells which enable an understanding of the different electronic and ionic processes taking place during device operation.
eng
© American Chemical Society
perovskite solar cells
perovskite
impedance spectroscopy
lead
Properties of Contact and Bulk Impedances in Hybrid Lead Halide Perovskite Solar Cells Including Inductive Loop Elements
info:eu-repo/semantics/article
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