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 |
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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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