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Title

Localized surface plasmon effects on the photophysics of perovskite thin films embedding metal nanoparticles

Authorsbayles, Aaron; Carretero-Palacios, Sol; Calió, Laura; Lozano, Gabriel CSIC ORCID; Calvo, Mauricio E. CSIC ORCID ; Míguez, Hernán CSIC ORCID
Issue Date2020
PublisherRoyal Society of Chemistry (UK)
CitationJournal of Materials Chemistry C 8(3) 916-921 (2020)
AbstractHerein we provide direct experimental evidence that proves that the photophysical properties of thin methylammonium lead iodide perovskite films are significantly enhanced by localized surface plasmon resonances (SPRs). Observations are well supported by rigorous calculations that prove that improved light harvesting can be unequivocally attributed to plasmonic scattering and near field reinforcement effects around silver nanoparticles embedded within the semiconductor layer. Adequate design of the localized SPR allows raising the absorptance of a 300 nm thick film at well-defined spectral regions while minimizing the parasitic absorption from the metallic inclusions. Measured enhancements can be as large as 80% at specific wavelengths and 20% when integrated over the whole range at which SPR occurs, in agreement with theoretical estimations. Simultaneously, the characteristic quenching effect that the vicinity of metals has on the photoluminescence of semiconductors is largely compensated for by the combined effect of the enhanced photoexcitation and the higher local density of photon states occurring at SPR frequencies, with a two fold increase of the perovskite photoemission efficiency being measured.
Publisher version (URL)http://dx.doi.org/10.1039/C9TC05785D
URIhttp://hdl.handle.net/10261/200247
DOI10.1039/C9TC05785D
ISSN2050-7526
Appears in Collections:(ICMS) Artículos




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