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Title

Responsive optical materials based on ligand-free perovskite quantum dots embedded in mesoporous scaffolds

AuthorsRomero-Pérez, Carlos; Zanetta, Andrea; Fernández-Delgado, Natalia; Herrera Collado, Miriam; Hernández-Saz, Jesús; Molina, Sergio I.; Calió, Laura; Calvo, Mauricio E. CSIC ORCID ; Míguez, Hernán CSIC ORCID
KeywordsResponsive materials
CsPbBr3
Nanocrystals
Optical properties
Porous materials
Issue Date14-Dec-2022
PublisherDIGITAL.CSIC
CitationRomero-Pérez, Carlos; Zanetta, Andrea; Fernández-Delgado, Natalia; Herrera Collado, Miriam; Hernández-Saz, Jesús; Molina, Sergio I.; Calió, Laura; Calvo, Mauricio E.; Míguez, Hernán; 2022; Responsive optical materials based on ligand-free perovskite quantum dots embedded in mesoporous scaffolds [Dataset]; DIGITAL.CSIC; https://doi.org/10.20350/digitalCSIC/14818
AbstractHerein we show that dispersing inorganic Cesium Lead Bromide (CsPbBr3) perovskite quantum dots (QDs) in optical quality films, possessing an accessible and controlled pore size distribution, gives rise to fluorescent materials with a controlled and highly sensitive response to ambient changes. A scaffold based synthetic approach is employed to attain ligand-free QDs, whose pristine surface endows them with high sensitivity to the presence of different vapors in their vicinity. At the same time, the void network of the host offers a means to gradually expose the embedded QDs to such vapors. Under these conditions, the luminescent response of the QDs is mediated by the mesostructure of the matrix, which determines the rate at which vapor molecules will adsorb onto the pore walls and, eventually, condensate, filling the void space. With luminescence quantum yields as high as 60%, scaffold supported ligand-free perovskite nanocrystals display intense photoemission signals over the whole process, as well as high photo and chemical stability, which allows illuminating them for long periods of time and recovering the original response upon desorption of the condensed phase. The results herein presented open a new route to explore the application of perovskite QDs based materials in sensing.
URIhttp://hdl.handle.net/10261/284790
DOIhttps://doi.org/10.20350/digitalCSIC/14818
ReferencesRomero-Pérez, Carlos; Zanetta, Andrea; Fernández-Delgado, Natalia; Herrera Collado, Miriam; Hernández-Saz, Jesús; Molina, Sergio I.; Calió, Laura; Calvo, Mauricio E.; Míguez, Hernán. Responsive Optical Materials Based on Ligand-Free Perovskite Quantum Dots Embedded in Mesoporous Scaffolds. https://doi.org/10.1021/acsami.2c16867 . http://hdl.handle.net/10261/311265
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