Localized surface plasmon effects on the photophysics of perovskite thin films embedding metal nanoparticles
EntityUAM. Departamento de Física de Materiales
PublisherRoyal Society of Chemistry
10.1039/C9TC05785DJournal of Materials Chemistry C 2020.8 (2020): 916-921
ISSN2050-7526 (print); 2050-7534 (online)
Funded byThe research leading to these results has received funding from the Spanish Ministry of Economy and Competitiveness under grant MAT2017-88584-R (AEI/FEDER,UE). A. B. was supported by the U. S. Department of State through the Fulbright Program. S. C. P. is grateful for the support of the AEI under the Juan de la Cierva Incorporación programme (IJCI-2016-28549)
ProjectGobierno de España. MAT2017-88584-R; Gobierno de España. IJCI-2016-28549
SubjectsMethylammonium lead iodide perovskite films; Surface plasmon resonances (SPRs); Plasmonic scattering; Física
Rights© 2020 The Royal Society of Chemistry
Esta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial 4.0 Internacional.
Herein 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
Google Scholar:Bayles, Aaron - Carretero-Palacios, Sol - Calió, Laura - Lozano, Gabriel - Calvo, Mauricio E. - Míguez, Hernán
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