Influence of nanoenvironment on luminescence of Eu3+ activated SnO2 nanocrystals

Chowdhury, Paramita Saha ; Saha, Sujata ; Patra, Amitava (2004) Influence of nanoenvironment on luminescence of Eu3+ activated SnO2 nanocrystals Solid State Communications, 131 (12). pp. 785-788. ISSN 0038-1098

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.ssc.2004.06.040

Abstract

The emission intensity of the peak at 612 nm (5D07F2) of the Eu3+ ions activated SnO2 nanocrystals (doped and coated) is found to be sensitive to the nanoenvironment. We have compared the luminescence efficiencies of the nanocrystals of SnO2 doped by Eu2O3 with those of SnO2 coated by Eu2O3 and we found that the intensities are significantly higher in coated nanocrystals. Furthermore, it is clear from luminescence intensity measurements that Eu3+ ions occupy low symmetry sites in the Eu2O3 coated SnO2 nanocrystal. The analysis suggests that the radiative relaxation rate is higher in Eu2O3 coated SnO2 nanocrystals than Eu2O3 doped SnO2 nanocrystals due to the asymmetric environment of Eu3+ ions in coated samples.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Rare-Earth Ions; Photoluminescence; Nanocrystalline
ID Code:104855
Deposited On:01 Dec 2017 11:17
Last Modified:01 Dec 2017 11:17

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