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• W2059196989 abstract "In this paper a systematic and detailed study on the photophysical behavior of silicon nanocrystals (alkyl-capped, surface oxidized, oxide-encapsulated) is presented in order to elucidate the influence of local environment and surface species on the luminescence properties. Experiments at different temperatures – ranging from room temperature (RT) to 7 K – confirmed the important influence of the silicon nanocrystal (ncSi) surface on the photoluminescence (PL). Our comparative study of ncSi embedded in different matrices shows a strong increase of the exciton lifetimes at low temperature and the dominant widening of the bandgap for small ncSi after deactivation of traps below 100–150 K. The present findings have significant implications for the use of ncSi in optoelectronic and biomedical applications, since they show that surface oxidation can occur in ligand-capped ncSi which limits the accessible emission wavelength for these applications to the orange/red spectral region when current passivation strategies are used." @default.
• W2059196989 created "2016-06-24" @default.
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• W2059196989 date "2012-09-01" @default.
• W2059196989 modified "2023-10-10" @default.
• W2059196989 title "Photophysics of organically-capped silicon nanocrystals – A closer look into silicon nanocrystal luminescence using low temperature transient spectroscopy" @default.
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• W2059196989 doi "https://doi.org/10.1016/j.chemphys.2012.07.009" @default.
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