Thirumalai, J. and Jagannathan, R. and Trivedi, D.C. (2007) Y2O2S:Eu3+ nanocrystals, a strong quantum-confined luminescent system. Journal of Luminescence, 126. pp. 353-358.

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Abstract

Trivalent europium-doped yttrium oxysulfide nanocrystals synthesized using sol–gel thermolysis show significant blue shifts in the excitation bands corresponding to fundamental absorption, charge-transfer absorption. A significant blue shift observed in the fundamental absorption edge for the nanocrystals having an average crystallite size (f) in the range 9–15nm indicates a strong quantum confinement with a Bohr exciton radius of 5–13 nm. Also, the diffuse reflectance spectra and the corresponding Kubelka–Munk plot indicate the possibility of profound decrease in the absorption coefficient of Eu3+–ligand charge-transfer species necessitating further studies in this wide-gap semiconductor nanocrystalline system.

Item Type:	Article
Uncontrolled Keywords:	Nanocrystals; Oxysulfide; Photoluminescence; Quantum confinement; Europium
Subjects:	Electrochemical Materials Science
Divisions:	UNSPECIFIED
Depositing User:	ttbdar CECRI
Date Deposited:	30 Mar 2012 12:48
Last Modified:	30 Mar 2012 12:48
URI:	http://cecri.csircentral.net/id/eprint/769

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