Y2O2S : Eu3+ nanocrystals—synthesis and luminescent properties

J. Dhanaraj; R. Jagannathan; D. C. Trivedi

doi:10.1039/B302073H

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Y₂O₂S : Eu³⁺nanocrystals—synthesis and luminescent properties

J. Dhanaraj,^a R. Jagannathan*^a and D. C. Trivedi^a

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^a Central Electrochemical Research Institute, Karaikudi, (T.N), India
E-mail: jags57_99@yahoo.com

Abstract

Luminescent Y₂O₂S : Eu³⁺ nanoceramics having an average particle size of 20 nm has been prepared through a gel–polymer thermolysis process employing a urea–formaldehyde resin. In this nanocrystalline system, large blue shifts (in relation to the bulk system) of ∼5000 cm⁻¹ and ∼2000 cm⁻¹ in the photoluminescence excitation bands corresponding to the excitonic region and the Eu³⁺–ligand charge transfer region respectively have been observed. These may be explained by considering possible size dependent changes in optical electronegativity and quantum confinement effects occurring in this large bandgap semiconductor system.

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Article information

DOI: https://doi.org/10.1039/B302073H
Article type: Paper
Submitted: 21 Feb 2003
Accepted: 08 May 2003
First published: 23 May 2003

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J. Mater. Chem., 2003,13, 1778-1782

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Y₂O₂S : Eu³⁺ nanocrystals—synthesis and luminescent properties

J. Dhanaraj, R. Jagannathan and D. C. Trivedi, J. Mater. Chem., 2003, 13, 1778 DOI: 10.1039/B302073H

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Journal of Materials Chemistry