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Article Dans Une Revue Advanced Functional Materials Année : 2023

Investigation of LSPR Coupling Effects toward the Rational Design of Cs x WO 3– δ Based Solar NIR Filtering Coatings

Résumé

Abstract The optical range of localized surface plasmon resonance (LSPR) is extended into the infrared region, thanks to the development of highly doped semiconductor nanocrystals. Particularly, the near‐infrared (NIR) range holds a significant interest in managing solar radiation. However, practical applications necessitate the arrangement of particles, which is known to possibly impact their optical properties through LSPR coupling effects. How such coupling modifies the LSPR response in semiconductor hosts remains largely unexplored. In this study, a protocol for producing composite coatings composed of cesium‐doped tungsten bronze nanocrystals embedded in a silica matrix is presented. Achieving individual dispersion of nanocrystals is made possible through careful selection of a surface polyglycerol ligand exchange. This allows to tune the interparticle distance by adjusting the nanocrystal volume fraction in the composite. The findings demonstrate that LSPR coupling effects significantly influence the LSPR intensity of nanocrystals in the composite when the nanocrystal‐to‐nanocrystal distance matches their size. Beyond elucidating the LSPR coupling effect, this study provides insights into the potential use of Cs‐HTB nanocrystals for solar control applications. Through the optimization of morphology and film structure, remarkable selectivity is obtained in terms of maintaining good transparency in the visible range while achieving high absorption in the NIR.

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Chimie
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Dates et versions

hal-04271542 , version 1 (06-11-2023)

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Louise Daugas, Khalid Lahlil, Capucine Cleret de Langavant, Ileana Florea, Eric Larquet, et al.. Investigation of LSPR Coupling Effects toward the Rational Design of Cs x WO 3– δ Based Solar NIR Filtering Coatings. Advanced Functional Materials, 2023, 33 (43), ⟨10.1002/adfm.202212845⟩. ⟨hal-04271542⟩
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