Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/175935
Share/Export:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Title

Origin of Light-Induced Photophysical Effects in Organic Metal Halide Perovskites in the Presence of Oxygen

AuthorsAnaya, Miguel CSIC ORCID; Galisteo-López, Juan F.; Calvo, Mauricio E. CSIC ORCID ; Espinós, J.P. CSIC ORCID; Míguez, Hernán CSIC ORCID
Issue Date2018
PublisherAmerican Chemical Society
CitationJournal of Physical Chemistry Letters 9: 3891- 3896 (2018)
AbstractHerein we present a combined study of the evolution of both the photoluminescence (PL) and the surface chemical structure of organic metal halide perovskites as the environmental oxygen pressure rises from ultrahigh vacuum up to a few thousandths of an atmosphere. Analyzing the changes occurring at the semiconductor surface upon photoexcitation under a controlled oxygen atmosphere in an X-ray photoelectron spectroscopy (XPS) chamber, we can rationalize the rich variety of photophysical phenomena observed and provide a plausible explanation for light-induced ion migration, one of the most conspicuous and debated concomitant effects detected during photoexcitation. We find direct evidence of the formation of a superficial layer of negatively charged oxygen species capable of repelling the halide anions away from the surface and toward the bulk. The reported PL transient dynamics, the partial recovery of the initial state when photoexcitation stops, and the eventual degradation after intense exposure times can thus be rationalized.
URIhttp://hdl.handle.net/10261/175935
DOI10.1021/acs.jpclett.8b01830
Identifiersdoi: 10.1021/acs.jpclett.8b01830
issn: 1948-7185
Appears in Collections:(ICMS) Artículos




Files in This Item:
Show full item record
Review this work

SCOPUSTM   
Citations

108
checked on Feb 10, 2024

WEB OF SCIENCETM
Citations

106
checked on Feb 29, 2024

Page view(s)

195
checked on Mar 1, 2024

Download(s)

242
checked on Mar 1, 2024

Google ScholarTM

Check

Altmetric

Altmetric


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