2024-03-29T07:44:08Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/1335152024-01-09T10:08:07Zcom_10234_2507com_10234_9col_10234_6973
00925njm 22002777a 4500
dc
S. Sánchez, Rafael
author
González Pedro, Victoria
author
Lee, Jin Wook
author
Park, Nam-Gyu
author
Kang, Yong Soo
author
Mora-Sero, Ivan
author
Bisquert, Juan
author
2014-06
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.
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.
http://hdl.handle.net/10234/133515
http://dx.doi.org/10.1021/jz5011187
perovskite solar cell
lead halide perovskite
transient photovoltage decay
impedance spectroscopy
Slow dynamic processes in lead halide perovskite solar cells. Characteristic times and hysteresis