English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/186330
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:

Title

Influence of the substrate on the bulk properties of hybrid lead halide perovskite films

AuthorsCliment-Pascual, Esteban ; Hames, Bruno Clasen; Moreno-Ramírez, Jorge S.; Álvarez, Angel Luis; Juarez-Perez, Emilio J.; Mas-Marza, Elena; Mora-Seró, Ivan; Andrés, Alicia de ; Coya, Carmen
Issue Date14-Dec-2016
PublisherRoyal Society of Chemistry (UK)
CitationJournal of Materials Chemistry A 4(46): 18153-18163 (2016)
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, TiO and PEDOT:PSS) affect not just the degree of preferential orientation and crystal grain size but also the lattice parameters of CHNHPbI films synthesized from the PbCl 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 Raman peaks. With increasing laser power the chemical transformation into PbO is clearly identified by the 140 and 275 cm 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.
Publisher version (URL)http://doi.org/10.1039/C6TA08695K
URIhttp://hdl.handle.net/10261/186330
DOIhttp://dx.doi.org/10.1039/c6ta08695k
Identifiersdoi: 10.1039/c6ta08695k
e-issn: 2050-7496
issn: 2050-7488
Appears in Collections:(ICMM) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.