Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5398742 | Journal of Luminescence | 2015 | 6 Pages |
Abstract
The temperature dependence of the infrared luminescence of a fluorotellurite glass doped with 0.01 and 2.5Â mol% of Nd3+ ions was studied in order to use it as a high temperature sensing probe. For this purpose, the emission intensities of the (4S3/2, 4F7/2), (2H9/2, 4F5/2),4F3/2â4I9/2 transitions were measured in a wide range of temperatures from 300 upto 650Â K. The changes in the emission profiles were calibrated by means of the fluorescence intensity ratio technique. The calibrations showed a strong dependence on the Nd3+ ions concentration, having the low-doped concentrated sample the best response to changes of temperature. The maximum value obtained for the thermal sensibility is 17Ã10â4Â Kâ1 at 640Â K, being one of the highest values found in the literature for Nd3+ optical temperature sensors. Finally, the experimental calibrations were compared with the theoretical temperature luminescence response calculated from the Judd-Ofelt theory.
Related Topics
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Chemistry
Physical and Theoretical Chemistry
Authors
E.A. Lalla, S.F. León-Luis, V. Monteseguro, C. Pérez-RodrÃguez, J.M. Cáceres, V. LavÃn, U.R. RodrÃguez-Mendoza,