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Title

Mechanism of Photoluminescence Intermittency in Organic–Inorganic Perovskite Nanocrystals

AuthorsGalisteo-López, Juan F.; Calvo, Mauricio E. CSIC ORCID ; Rojas, T. Cristina; Míguez, Hernán CSIC ORCID
KeywordsHybrid organic inorganic perovskites
Nanocrystal
Photoluminescence
Blinking
Spectroscopy
Issue DateJan-2019
PublisherAmerican Chemical Society
CitationACS Applied Materials and Interfaces, 11 (6): 6344-6349 (2019)
AbstractLead halide perovskite nanocrystals have demonstrated their potential as active materials for optoelectronic applications over the past few years. Nevertheless one issue which hampers their applicability has to do with the observation of photoluminescence intermittency, commonly referred to as blinking, as in their inorganic counterparts. Such behavior, reported for structures well above the quantum confinement regime, has been discussed to be strongly related with the presence of charge carrier traps. In this work we analyze the characteristics of this intermittency and explore the dependence with the surrounding atmosphere, showing evidence for the critical role played by the presence of oxygen. We discuss a possible mechanism in which a constant creation/annihilation of halide-related carrier traps takes place under light irradiation, the dominant rate being determined by the atmosphere
Publisher version (URL)https://doi.org/10.1021/acsami.8b17122
URIhttp://hdl.handle.net/10261/196300
DOI10.1021/acsami.8b17122
Appears in Collections:(ICMS) Artículos




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