SnO2 nanocrystals are grown in silica starting from a sol-gel method and using Er doping to passivate the cluster boundaries. As a result, emission at 3.8 eV from the decay of SnO2 free excitons is observed in nanostructured SnO2:SiO2, besides the extrinsic 2 eV luminescence of defects in SnO2 and ascribable to substoichiometric nanocluster boundaries. The analysis of the extrinsic emission competitive with the ultraviolet (UV) luminescence evidences the involvement of a phonon mode at 210 cm(-1) from a SnO-like phase. The feasibility of passivated wide-band-gap nanocrystals in silica gives interesting perspectives for UV-emitting optical devices. (c) 2006 American Institute of Physics.

Brovelli, S., Chiodini, N., Meinardi, F., Lauria, A., Paleari, A. (2006). Ultraviolet free-exciton light emission in Er-passivated SnO2 nanocrystals in silica. APPLIED PHYSICS LETTERS, 89(15) [10.1063/1.2362583].

Ultraviolet free-exciton light emission in Er-passivated SnO2 nanocrystals in silica

BROVELLI, SERGIO;CHIODINI, NORBERTO;MEINARDI, FRANCESCO;LAURIA, ALESSANDRO;PALEARI, ALBERTO MARIA FELICE
2006

Abstract

SnO2 nanocrystals are grown in silica starting from a sol-gel method and using Er doping to passivate the cluster boundaries. As a result, emission at 3.8 eV from the decay of SnO2 free excitons is observed in nanostructured SnO2:SiO2, besides the extrinsic 2 eV luminescence of defects in SnO2 and ascribable to substoichiometric nanocluster boundaries. The analysis of the extrinsic emission competitive with the ultraviolet (UV) luminescence evidences the involvement of a phonon mode at 210 cm(-1) from a SnO-like phase. The feasibility of passivated wide-band-gap nanocrystals in silica gives interesting perspectives for UV-emitting optical devices. (c) 2006 American Institute of Physics.
Articolo in rivista - Articolo scientifico
tin oxide, nanocrystals, erbium doping, exciton, uv emission
English
2006
89
15
153126
none
Brovelli, S., Chiodini, N., Meinardi, F., Lauria, A., Paleari, A. (2006). Ultraviolet free-exciton light emission in Er-passivated SnO2 nanocrystals in silica. APPLIED PHYSICS LETTERS, 89(15) [10.1063/1.2362583].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/1317
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