Noncapacitive hysteresis in perovskite solar cells at room temperature
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Otros documentos de la autoría: Almora Rodríguez, Osbel; Aranda Alonso, Clara; Zarazúa, Isaac; Guerrero, Antonio; Garcia-Belmonte, Germà
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http://dx.doi.org/10.1021/acsenergylett.6b00116 |
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Título
Noncapacitive hysteresis in perovskite solar cells at room temperatureAutoría
Fecha de publicación
2016Editor
American Chemical SocietyISSN
2380-8195Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://pubs.acs.org/doi/abs/10.1021/acsenergylett.6b00116Resumen
The current density−voltage (J−V) curves of perovskite
solar cells have been found to present a hysteresis-like distortion when
the measurement is done by sweeping the applied voltage at different
scan conditions. ... [+]
The current density−voltage (J−V) curves of perovskite
solar cells have been found to present a hysteresis-like distortion when
the measurement is done by sweeping the applied voltage at different
scan conditions. Hysteresis has raised many concerns about the feasibility
and long-term stability of this kind of photovoltaic technology. However,
there is a lack of distinction among different hysteretic phenomena which
is necessary to unravel its underlying physical and chemical mechanisms.
Here we distinguish between capacitive and noncapacitive currents
giving rise to specific hysteretic responses in the J−V curves of PSCs. It is
reported that capacitive current causing hysteresis dominates in regular
structures with TiO2 as bottom electron selective layer. This is mainly
caused by the charge, both ionic and electronic, accumulation ability of
the TiO2/perovskite interface but has no influence on the steady-state
operation. Noncapacitive hysteresis is observable at slow enough scan
rates in all kind of architectures. Inverted structures, including organic compounds as bottom hole selective layers and
fullerene materials as top contact, exhibit larger noncapacitive distortions because of the inherent reactivity of contact
materials and absorber perovskites [-]
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ACS Energy Lett., 2016, 1 (1), pp 209–215Derechos de acceso
© 2016 American Chemical Society
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