Capacitive dark currents, hysteresis, and electrode polarization in lead halide perovskite solar cells
Impacto
Scholar |
Otros documentos de la autoría: Almora Rodríguez, Osbel; Zarazúa, Isaac; Mas, Elena; Mora-Sero, Ivan; Bisquert, Juan; Garcia-Belmonte, Germà
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Mostrar el registro completo del ítemcomunitat-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.5b00480 |
Metadatos
Título
Capacitive dark currents, hysteresis, and electrode polarization in lead halide perovskite solar cellsAutoría
Fecha de publicación
2015-04Editor
American Chemical SocietyCita bibliográfica
ALMORA, Osbel, et al. Capacitive dark currents, hysteresis, and electrode polarization in lead halide perovskite solar cells. The journal of physical chemistry letters, 2015, vol. 6, no 9, p. 1645-1652.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://pubs.acs.org/doi/abs/10.1021/acs.jpclett.5b00480Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Despite spectacular advances in conversion efficiency of perovskite solar cell many aspects of its operating modes are still poorly understood. Capacitance constitutes a key parameter to explore which mechanisms control ... [+]
Despite spectacular advances in conversion efficiency of perovskite solar cell many aspects of its operating modes are still poorly understood. Capacitance constitutes a key parameter to explore which mechanisms control particular functioning and undesired effects as current hysteresis. Analyzing capacitive responses allows addressing not only the nature of charge distribution in the device but also the kinetics of the charging processes and how they alter the solar cell current. Two main polarization processes are identified. Dielectric properties of the microscopic dipolar units through the orthorhombic-to-tetragonal phase transition account for the measured intermediate frequency capacitance. Electrode polarization caused by interfacial effects, presumably related to kinetically slow ions piled up in the vicinity of the outer interfaces, consistently explain the reported excess capacitance values at low frequencies. In addition, current–voltage curves and capacitive responses of perovskite-based solar cells are connected. The observed hysteretic effect in the dark current originates from the slow capacitive mechanisms. [-]
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J. Phys. Chem. Lett., 2015, 6 (9)Derechos de acceso
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