Slow dynamic processes in lead halide perovskite solar cells. Characteristic times and hysteresis
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http://dx.doi.org/10.1021/jz5011187 |
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Títol
Slow dynamic processes in lead halide perovskite solar cells. Characteristic times and hysteresisAutoria
Data de publicació
2014-06Editor
American Chemical SocietyCita bibliogràfica
SANCHEZ, Rafael S., et al. Slow dynamic processes in lead halide perovskite solar cells. Characteristic times and hysteresis. The Journal of Physical Chemistry Letters, 2014, 5.13: 2357-2363.Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://pubs.acs.org/doi/abs/10.1021/jz5011187Versió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
Characteristic times of perovskite solar cells (PSCs) have been measured by different techniques: transient photovoltage decay, transient photoluminescence, and impedance spectroscopy. A slow dynamic process is detected ... [+]
Characteristic times of perovskite solar cells (PSCs) have been measured by different techniques: transient photovoltage decay, transient photoluminescence, and impedance spectroscopy. A slow dynamic process is detected that shows characteristic times in the seconds to milliseconds scale, with good quantitative agreement between transient photovoltage decay and impedance spectroscopy. Here, we show that this characteristic time is related with a novel slow dynamic process caused by the peculiar structural properties of lead halide perovskites and depending on perovskite crystal size and organic cation nature. This new process may lie at the basis of the current–voltage hysteresis reported for PSCs and could have important implications in PSC performance because it may give rise to distinct dynamical behavior with respect to other classes of photovoltaic devices. Furthermore, we show that low-frequency characteristic time, commonly associated with electronic carrier lifetime in other photovoltaic devices, cannot be attributed to a recombination process in the case of PSCs. [-]
Publicat a
J. Phys. Chem. Lett., 2014, 5 (13)Drets d'accés
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