Inductive Loop in the Impedance Response of Perovskite Solar Cells Explained by Surface Polarization Model
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Altres documents de l'autoria: Ghahremanirad, Elnaz; Bou, Agustín; Olyaee, Saeed; Bisquert, Juan
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http://dx.doi.org/10.1021/acs.jpclett.7b00415 |
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Títol
Inductive Loop in the Impedance Response of Perovskite Solar Cells Explained by Surface Polarization ModelData de publicació
2017-03Editor
American Chemical SocietyCita bibliogràfica
GHAHREMANIRAD, Elnaz, et al. Inductive Loop in the Impedance Response of Perovskite Solar Cells Explained by Surface Polarization Model. The Journal of Physical Chemistry Letters, 2017, vol. 8, no 7, p. 1402-1406.Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://pubs.acs.org/doi/abs/10.1021/acs.jpclett.7b00415Versió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
The analysis of perovskite solar cells by impedance spectroscopy has provided a rich variety of behaviors that demand adequate interpretation. Two main features have been reported: First, different impedance spectral ... [+]
The analysis of perovskite solar cells by impedance spectroscopy has provided a rich variety of behaviors that demand adequate interpretation. Two main features have been reported: First, different impedance spectral arcs vary in combination; second, inductive loops and negative capacitance characteristics appear as an intrinsic property of the current configuration of perovskite solar cells. Here we adopt a previously developed surface polarization model based on the assumption of large electric and ionic charge accumulation at the external contact interface. Just from the equations of the model, the impedance spectroscopy response is calculated and explains the mentioned general features. The inductance element in the equivalent circuit is the result of the delay of the surface voltage and depends on the kinetic relaxation time. The model is therefore able to quantitatively describe exotic features of the perovskite solar cell and provides insight into the operation mechanisms of the device. [-]
Proyecto de investigación
MINECO of Spain (MAT2016-76892-C3-1-R) ; Generalitat Valenciana (PROMETEOII/2014/020)Drets d'accés
© 2017 American Chemical Society.
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