Publication
Title
Energy transfer in doped scheelites : use as thermographic phosphor
Author
Abstract
In this paper the luminescence of the scheelite-based CaGd2(1-x)Eu2x(WO4)4 solid solutions is investigated as a function of the Eu content and temperature. All phosphors show intense red luminescence due to the 5D0 7F2 transition in Eu3+, along with other transitions from the 5D1 and 5D0 excited states. For high Eu3+ concentrations the intensity ratio of the emission originating from the 5D1 and 5D0 levels has a non-conventional temperature dependence, which could be explained by a phonon-assisted cross-relaxation process. It is demonstrated that this intensity ratio can be used as a measure of temperature with high spatial resolution, allowing the use of these scheelites as thermographic phosphor. The main disadvantage of many thermographic phosphors, a decreasing signal for increasing temperature, is absent.
Language
English
Source (journal)
Optics express. - -
Publication
2014
ISSN
1094-4087
DOI
10.1364/OE.22.00A961
Volume/pages
22 :9 (2014) , p. A961-A972
ISI
000335905300037
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Project info
Optimising the photoluminescence in scheelite-based materials through the incommensurate modulation of the cations.
Quantitative electron microscopy: from experimental measurements to precise numbers.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 02.06.2014
Last edited 09.10.2023
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