Journal
JOURNAL OF LUMINESCENCE
Volume 129, Issue 3, Pages 263-269Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2008.10.008
Keywords
Luminescence thermometry; Decay pathway; Europium phosphor; Thermal quenching; Charge-transfer state; Apatite
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Funding
- NSF Chemical and Transport Systems Division [CTS-0428941]
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The temperature-dependent luminescence of Eu:Ca2Gd8Si6O26 and its decay pathways are investigated in order to assess the utility of the material as a thermometric phosphor. Non-radiative decays are found to compete with radiative processes even at room temperature. A decay pathway involving decay through charge-transfer states is proposed based on the decay profiles of emissions from D-5(1) and D-5(0) levels and on the temperature sensitivity of the spectra as observed after excitation by several wavelengths. The implications of this on solid-state lighting are also discussed. (C) 2008 Elsevier B.V. All rights reserved.
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