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Musa, I., Massuyeau, F., Cario, L., Duvail, J. L., Jobic, S., Deniard, P. & Faulques, E. (2011) Temperature and size dependence of time-resolved exciton recombination in ZnO quantum dots. Appl. Phys. Lett. 99 243107. 
Added by: Laurent Cournède (2016-03-10 21:32:19)
Type de référence: Article
DOI: 10.1063/1.3669511
Numéro d'identification (ISBN etc.): 0003-6951
Clé BibTeX: Musa2011
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Catégories: MIOPS, PMN
Mots-clés: gap, photoluminescence, room-temperature
Créateurs: Cario, Deniard, Duvail, Faulques, Jobic, Massuyeau, Musa
Collection: Appl. Phys. Lett.
Consultations : 9/369
Indice de consultation : 2%
Indice de popularité : 0.5%
Résumé     
ZnO nanocrystals with various sizes were prepared and characterized. Their photoluminescence dynamics has been investigated at low temperatures. For the smallest particles (3 nm), a defect-induced long-lived photoluminescence occurs around 2.5 eV which is slowed down at decay times longer than 3 ns when sample temperature T decreases. From thermal quenching of the 2.5 eV band, the exciton dissociation energy at defect centers is estimated around similar to 11.8 meV. For larger crystallites (10 and 20 nm), the ultraviolet emission observed at 3.32 eV decays in less than 85 ps and follows a Varshni law [Y. P. Varshni, Physica (Amsterdam) 34, 149 (1967)]. (C) 2011 American Institute of Physics. [doi:10.1063/1.3669511]
Added by: Laurent Cournède  
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