Effect of humidity on the a.c. impedance of CH(3)NH(3)SnCl(3) hybrid films (Articolo in rivista)

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  • Effect of humidity on the a.c. impedance of CH(3)NH(3)SnCl(3) hybrid films (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1007/s00339-011-6407-z (literal)
Alternative label
  • R. Mosca 1, P. Ferro 1, T. Besagni 1, D. Calestani 1, F. Chiarella 2, F. Licci 1 (2011)
    Effect of humidity on the a.c. impedance of CH(3)NH(3)SnCl(3) hybrid films
    in Applied physics. A, Materials science & processing (Print); SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • R. Mosca 1, P. Ferro 1, T. Besagni 1, D. Calestani 1, F. Chiarella 2, F. Licci 1 (literal)
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  • 1181 (literal)
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  • 1187 (literal)
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  • ID_PUMA: cnr.imem/2011-A0-024 (literal)
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  • http://link.springer.com/article/10.1007%2Fs00339-011-6407-z (literal)
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  • 104 (literal)
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  • 7 (literal)
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  • 4 (literal)
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  • ISI Web of Science (WOS) (literal)
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  • [ 1 ] IMEM CNR, I-43124 Fontanini Parma, Italy; [ 2 ] CNR INFM Coherentia, I-80125 Naples, Italy (literal)
Titolo
  • Effect of humidity on the a.c. impedance of CH(3)NH(3)SnCl(3) hybrid films (literal)
Abstract
  • mpedance spectroscopy measurements show that complex conductivity of thermally ablated CH(3)NH(3)SnCl(3) films is strongly enhanced when humidity increases. Coplanar two-electrode test devices are modeled through an equivalent circuit comprising one resistance and two constant phase elements. It is shown that the influence of ambient humidity is mainly resistive. The dynamic responses of the devices to humidification/dehumidification cycles point out that the a.c. current varies by more than three orders of magnitude when humidity is varied between dry air and 80% relative humidity. The rise times are few hundred seconds while fall times are as short as few tens of seconds. This observation suggests that impedance variations are determined by mechanisms involving loosely bound water molecules physisorbed at the surface of the hybrid film. The results obtained are discussed in terms of protonic conduction. (literal)
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