Impact of Capacitive Effect and Ion Migration on the Hysteretic Behavior of Perovskite Solar Cells
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Other documents of the author: 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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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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http://dx.doi.org/10.1021/acs.jpclett.5b02229 |
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Title
Impact of Capacitive Effect and Ion Migration on the Hysteretic Behavior of Perovskite Solar CellsAuthor (s)
Date
2015-11Publisher
American Chemical SocietyISSN
1948-7185Type
info:eu-repo/semantics/articlePublisher version
http://pubs.acs.org/doi/10.1021/acs.jpclett.5b02229Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
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. [-]
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The Journal of Physical Chemistry Letters, 2015, vol. 6, núm. 23Rights
Copyright © 2015 American Chemical Society
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