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dc.contributor.authorCliment-Pascual, Esteban
dc.contributor.authorClasen Hames, Bruno
dc.contributor.authorMoreno Ramírez, Jorge S.
dc.contributor.authorÁlvarez, Ángel Luis
dc.contributor.authorJuárez Pérez, Emilio José
dc.contributor.authorMas Marzá, Elena
dc.contributor.authorMora-Sero, Ivan
dc.contributor.authorDe Andrés, Alicia
dc.contributor.authorCoya, Carmen
dc.date.accessioned2017-01-31T13:15:57Z
dc.date.available2017-01-31T13:15:57Z
dc.date.issued2016-10
dc.identifier.citationCLIMENT-PASCUAL, Esteban, et al. Influence of the substrate on the bulk properties of hybrid lead halide perovskite films. Journal of Materials Chemistry A, 2016, vol. 4, no 46, p. 18153-18163.ca_CA
dc.identifier.urihttp://hdl.handle.net/10234/165757
dc.description.abstractIn addition to the known effect of the substrate on the interfacial properties of perovskite films, here we show that the bulk properties of hybrid lead halide perovskite films depend on the type of substrate used for film growth. Despite the relative large film thickness, ∼600 nm, the roughness and nature of the substrate layer (glass, FTO, TiO2 and PEDOT:PSS) affect not just the degree of preferential orientation and crystal grain size but also the lattice parameters of CH3NH3PbI3 films synthesized from the PbCl2 precursor. The obtained changes in lattice parameters indicate that the Pb–Pb distance varies by around 0.7%. We suggest that the substrate roughness and chemical nature determine the concentration of defects mainly by varying the chlorine content and probably by the incorporation of oxygen and iodine vacancies during film nucleation and growth. These differences also have consequences in the observed light induced transformations. Upon laser illumination, the formation of additional defects, most probably related to oxygen, is revealed by 110 and 165 cm−1 Raman peaks. With increasing laser power the chemical transformation into PbOx is clearly identified by the 140 and 275 cm−1 Raman peaks. The irreversible photoluminescence enhancement observed at low power with illumination time, also dependent on the substrate nature, is proposed to be due to the localization of the electron–hole excitons created in the vicinity of the light generated defects. These results shed light on the performance of the perovskite layer and help to understand how bulk processes, where ion migration is a conspicuous example, are severely affected by interfacial properties such as those imposed by the substrate.ca_CA
dc.description.sponsorShipFunding by the Spanish Ministerio de Economía y Competitividad (MINECO) under Projects MAT2015-65356-C3-1-R and 2-R, MAT2014-54852-R and MAT2015-70611-ERC and Comunidad de Madrid Excellence Network under Project S2013/MIT-2740 (and Associated Lab LABCADIO belonging to CM net labs ref. 351) is acknowledged. We also acknowledge the MINECO for financial support and provision of synchrotron radiation facilities at ESRF, and thank María Vila for her assistance in using beamline BM25-SpLine. B. C. H. is grateful to the support of the National Council of Technological and Scientific Development (CNPq), Brazil, through the Science without Borders program.ca_CA
dc.format.extent10 p.ca_CA
dc.format.mimetypeapplication/pdfca_CA
dc.language.isoengca_CA
dc.publisherRoyal Society of Chemistryca_CA
dc.relation.isPartOfJ. Mater. Chem. A, 2016, 4ca_CA
dc.rights© The Royal Society of Chemistry 2016ca_CA
dc.subjectperovskite filmsca_CA
dc.subjectleadca_CA
dc.subjectsubstrateca_CA
dc.titleInfluence of the substrate on the bulk properties of hybrid lead halide perovskite filmsca_CA
dc.typeinfo:eu-repo/semantics/articleca_CA
dc.identifier.doihttp://dx.doi.org/10.1039/C6TA08695K
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_CA
dc.relation.publisherVersionhttp://pubs.rsc.org/-/content/articlehtml/2016/ta/c6ta08695kca_CA


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