Impact of Capacitive Effect and Ion Migration on the Hysteretic Behavior of Perovskite Solar Cells
Impacto
Scholar |
Otros documentos de la autoría: Chen, Bo; Yang, Mengjin; Zheng, Xiaojia; Wu, Congcong; Li, Wenle; Yan, Yongke; Bisquert, Juan; Garcia-Belmonte, Germà; Zhu, Kai; Priya, Shashank
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Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
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comunitat-uji-handle3:10234/6973
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http://dx.doi.org/10.1021/acs.jpclett.5b02229 |
Metadatos
Título
Impact of Capacitive Effect and Ion Migration on the Hysteretic Behavior of Perovskite Solar CellsAutoría
Fecha de publicación
2015-11Editor
American Chemical SocietyISSN
1948-7185Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://pubs.acs.org/doi/10.1021/acs.jpclett.5b02229Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
In the past five years, perovskite solar cells (PSCs) based on organometal halide perovskite have exhibited extraordinary photovoltaic (PV) performance. However, the PV measurements of PSCs have been widely recognized ... [+]
In the past five years, perovskite solar cells (PSCs) based on organometal halide perovskite have exhibited extraordinary photovoltaic (PV) performance. However, the PV measurements of PSCs have been widely recognized to depend on voltage scanning condition (hysteretic current density–voltage [J–V] behavior), as well as on voltage treatment history. In this study, we find that varied PSC responses are attributable to two causes. First, capacitive effect associated with electrode polarization provides a slow transient non-steady-state photocurrent that modifies the J–V response. Second, modification of interfacial barriers induced by ion migration can modulate charge-collection efficiency so that it causes a pseudo-steady-state photocurrent, which changes according to previous voltage conditioning. Both phenomena are strongly influenced by ions accumulating at outer interfaces, but their electrical and PV effects are different. The time scale for decay of capacitive current is on the order of seconds, whereas the slow redistribution of mobile ions requires several minutes. [-]
Publicado en
The Journal of Physical Chemistry Letters, 2015, vol. 6, núm. 23Derechos de acceso
Copyright © 2015 American Chemical Society
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