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dc.contributor.authorColl, Mariona
dc.contributor.authorGómez, Andrés
dc.contributor.authorMas Marzá, Elena
dc.contributor.authorAlmora Rodríguez, Osbel
dc.contributor.authorGarcia-Belmonte, Germà
dc.contributor.authorCampoy-Quiles, Mariano
dc.contributor.authorBisquert, Juan
dc.date.accessioned2016-04-15T11:55:35Z
dc.date.available2016-04-15T11:55:35Z
dc.date.issued2015-03
dc.identifier.citationCOLL, Mariona, et al. Polarization Switching and Light-Enhanced Piezoelectricity in Lead Halide Perovskites. The journal of physical chemistry letters, 2015, vol. 6, no 8, p. 1408-1413.ca_CA
dc.identifier.urihttp://hdl.handle.net/10234/158710
dc.description.abstractWe investigate the ferroelectric properties of photovoltaic methylammonium lead halide CH3NH3PbI3 perovskite using piezoelectric force microscopy (PFM) and macroscopic polarization methods. The electric polarization is clearly observed by amplitude and phase hysteresis loops. However, the polarization loop decreases as the frequency is lowered, persisting for a short time only, in the one second regime, indicating that CH3NH3PbI3 does not exhibit permanent polarization at room temperature. This result is confirmed by macroscopic polarization measurement based on a standard capacitive method. We have observed a strong increase of piezoelectric response under illumination, consistent with the previously reported giant photoinduced dielectric constant at low frequencies. We speculate that an intrinsic charge transfer photoinduced dipole in the perovskite cage may lie at the origin of this effect.ca_CA
dc.description.sponsorShipFinancial support from the Spanish Ministerio de Economia y Competitividad (MINECO) through RyC contracts 2013-12448 and 2011-07726 and projects MAT2013-47192-C3-1-R and MAT2012-37776ca_CA
dc.format.extent5 p.ca_CA
dc.format.mimetypeapplication/pdfca_CA
dc.language.isoengca_CA
dc.publisherAmerican Chemical Societyca_CA
dc.relation.isPartOfJ. Phys. Chem. Lett., 2015, 6 (8)ca_CA
dc.rightsCopyright © 2015 American Chemical Societyca_CA
dc.subjectCH3NH3PbI3ca_CA
dc.subjectdipoleca_CA
dc.subjectdipole momentca_CA
dc.subjectferroelectricca_CA
dc.subjecthysteresisca_CA
dc.subjectloopsca_CA
dc.subjectperovskite solar cellsca_CA
dc.subjectpiezoelectric force microscopyca_CA
dc.subjectpolarizationca_CA
dc.titlePolarization Switching and Light-Enhanced Piezoelectricity in Lead Halide Perovskitesca_CA
dc.typeinfo:eu-repo/semantics/articleca_CA
dc.identifier.doihttp://dx.doi.org/10.1021/acs.jpclett.5b00502
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccessca_CA
dc.relation.publisherVersionhttp://pubs.acs.org/doi/abs/10.1021/acs.jpclett.5b00502ca_CA


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