Balaji, Sathravada and Misra, Dipten and Debnath, Radhaballabh (2011) Enhanced Green Emission from Er(2)WO(6) Nanocrystals Embedded Composite Tellurite Glasses. Journal of Fluorescence, 21 (3). 1053-1060 . ISSN 1053-0509

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A series of tungsten-tellurite glasses activated with different concentrations (0-1.5 mol %) of Er(3+) has been synthesized. The structural properties of the best luminescent sample and the optical properties of its Er(3+) ions, are studied both immediate after its preparation as well as after its ageing. On ageing the glass suffers structural reorganization and generates Er(2)WO(6)-nanocrystals in the matrix, which greatly enhances the normal and upconversion green luminescence efficiency of Er(3+). The nanocrystal aided enhancement of normal and upconversion luminescence of Er(3+) of the glass has been attributed to the crystal field effects of the new environment of Er(3+) in the nanocrystals. A phenomenon of preferential enhancement of red upconversion luminescence at the cost of green upconversion luminescence of Er(3+) at its higher concentrations in the glass has been observed and the related photo-physics is proposed. The material shows the prospect of being used as NIR solar concentrator.

Item Type: Article
Subjects: Glass > Glass Properties
Depositing User: Bidhan Chaudhuri
Date Deposited: 16 Jan 2012 12:01
Last Modified: 30 Mar 2016 05:43

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