Ionic charging by local imbalance at interfaces in hybrid lead halide perovskites
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Otros documentos de la autoría: Almora Rodríguez, Osbel; Guerrero, Antonio; 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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Título
Ionic charging by local imbalance at interfaces in hybrid lead halide perovskitesFecha de publicación
2016Editor
AIP PublishingCita bibliográfica
ALMORA, Osbel; GUERRERO CASTILLEJO, Antonio; GARCÍA BELMONTE, Germà. Ionic charging by local imbalance at interfaces in hybrid lead halide perovskites. Applied Physics Letters (2016), v. 108, n. 4, pp. 1-4Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://scitation.aip.org/content/aip/journal/apl/108/4/10.1063/1.4941033Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Identification of specific operating mechanisms becomes particularly challenging when mixed ionic-electronic conductors are used in optoelectronic devices. Ionic effects in perovskitesolar cells are believed to distort ... [+]
Identification of specific operating mechanisms becomes particularly challenging when mixed ionic-electronic conductors are used in optoelectronic devices. Ionic effects in perovskitesolar cells are believed to distort operation curves and possess serious doubts about their long term stability. Current hysteresis and switchable photovoltaic characteristics have been connected to the kinetics of ion migration. However, the nature of the specific ionic mechanism (or mechanisms) able to explain the operation distortions is still poorly understood. It is observed here that the local rearrangement of ions at the electrodeinterfaces gives rise to commonly observed capacitive effects. Charging transients in response to step voltage stimuli using thick CH3NH3PbI3 samples show two main polarization processes and reveal the structure of the ionic double-layer at the interface with the non-reacting contacts. It is observed that ionic charging, with a typical response time of 10 s, is a local effect confined in the vicinity of the electrode, which entails absence of net mobile ionic concentration (space-charge) in the material bulk. [-]
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Applied Physics Letters (2016), v. 108, n. 4Derechos de acceso
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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