Neodymium doped fluoroindogallate glasses as highly -sensitive luminescent non-contact thermometers
authors Nunes, LAO; Souza, AS; Carlos, LD; Malta, OL
nationality International
journal OPTICAL MATERIALS
author keywords Fluoroindogallate glasses; Luminescent thermometers; R928 photomultiplier
keywords OPTICAL-TEMPERATURE SENSORS; INTENSITY RATIO TECHNIQUE; RARE-EARTH IONS; NANOPARTICLES; ND3+; NANOTHERMOMETERS; NANOSCALE
abstract Trivalent neodymium (Nd3+) can be used as high performance temperature luminescent ion sensor, namely in the near infrared spectral region. The disadvantage presented in the use of this ion is that transitions from thermally coupled levels show very different emission intensities. In order to solve this critical problem we propose to use Nd3+-doped fluoroindogallate glasses with low phonon cutoff energy (500 cm(-1)) as the active medium. By using a dopant concentration that minimizes losses due to cross relaxation processes and detecting the emissions of the thermally coupled levels with a R928 photo multiplier, without correction response for the wavelength dependence of the intensity, we have succeeded in getting the highest relative thermal sensitivities so far observed, 2.5%.K-1 and 7.4%.K-1, for the F-4(5/2) -> I-4(9/2)/F-4(3/2) -> I-4(9/2) and F-4(7/2) -> I-4(9/2)/F-4(3/2) -> I-4(9/2) intensity ratios, respectively at 288 K. (C) 2016 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0925-3467
isbn 1873-1252
year published 2017
volume 63
beginning page 42
ending page 45
digital object identifier (doi) 10.1016/j.optmat.2016.08.038
web of science category Materials Science, Multidisciplinary; Optics
subject category Materials Science; Optics
unique article identifier WOS:000393010000007
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journal impact factor 2.320
5 year journal impact factor 2.339
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