Theory of Hysteresis in Halide Perovskites by Integration of the Equivalent Circuit
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Title
Theory of Hysteresis in Halide Perovskites by Integration of the Equivalent CircuitDate
2022-07-28Publisher
American Chemical SocietyISSN
2694-2445Bibliographic citation
Bisquert, J.; Guerrero, A.; Gonzales, C. Theory of Hysteresis in Halide Perovskites by Integration of the Equivalent Circuit. ACS Phys. Chem Au 2021, 1, 1, 25–44, DOI: 10.1021/acsphyschemau.1c00009Type
info:eu-repo/semantics/articlePublisher version
https://pubs.acs.org/doi/10.1021/acsphyschemau.1c00009Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
Perovskite solar cells show a number of internal electronic–ionic effects that produce hysteresis in the current–voltage curves and a dependence of the temporal response on the conditions of the previous stimulus ... [+]
Perovskite solar cells show a number of internal electronic–ionic effects that produce hysteresis in the current–voltage curves and a dependence of the temporal response on the conditions of the previous stimulus applied to the sample. There are many models and explanations in the literature, but predictive methods that may lead to an assessment of the solar cell behavior based on independent measurements are needed. Here, we develop a method to predict time domain response starting from the frequency domain response measured by impedance spectroscopy over a collection of steady states. The rationale of the method is to convert the impedance response into a set of differential equations, in which the internal state variables emerge naturally and need not be predefined in terms of a physical (drift/diffusion/interfaces) model. Then, one solves (integrates) the evolution for a required external perturbation such as voltage sweep at a constant rate (cyclic voltammetry). Using this method, we solve two elementary but relevant equivalent circuit models for perovskite solar cells and memristors, and we show the emergence of hysteresis in terms of the relevant time and energy constants that can be fully obtained from impedance spectroscopy. We demonstrate quantitatively a central insight in agreement with many observations: regular hysteresis is capacitive, and inverted hysteresis is inductive. Analysis of several types of perovskite solar cells shows excellent correlation of the type of equivalent circuit and the observed hysteresis. A new phenomenon of transformation from capacitive to inductive hysteresis in the course of the current–voltage curve is reported. [-]
Is part of
ACS Physical Chemistry Au 2021 1 (1)Funder Name
Generalitat Valenciana | Ministerio de Ciencia, Innovación y Universidades
Project code
PROMETEU/2020/028 | GRISOLIAP/2019/048 | MICIU/ICTI2017-2020/PID2019-107348GB-I00
Project title or grant
Perovskitas hibridas estables por control de dimensionalidad e interfaces
Rights
info:eu-repo/semantics/openAccess
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- INAM_Articles [528]