Slow dynamic processes in lead halide perovskite solar cells. Characteristic times and hysteresis
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Otros documentos de la autoría: S. Sánchez, Rafael; González Pedro, Victoria; Lee, Jin Wook; Park, Nam-Gyu; Kang, Yong Soo; Mora-Sero, Ivan; Bisquert, Juan
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Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
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http://dx.doi.org/10.1021/jz5011187 |
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Título
Slow dynamic processes in lead halide perovskite solar cells. Characteristic times and hysteresisAutoría
Fecha de publicación
2014-06Editor
American Chemical SocietyCita bibliográfica
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.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://pubs.acs.org/doi/abs/10.1021/jz5011187Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
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. [-]
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J. Phys. Chem. Lett., 2014, 5 (13)Derechos de acceso
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