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Author Nair, Ramya G. ♦ Nigam, Sandeep ♦ Sudarsan, V. ♦ Vatsa, R. K. ♦ Dhabekar, B. S.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ ANNEALING ♦ COLOR ♦ DECAY ♦ DOPED MATERIALS ♦ EUROPIUM ADDITIONS ♦ EXCITATION ♦ IMPURITIES ♦ LIFETIME ♦ LUMINESCENCE ♦ PHOSPHORS ♦ QUANTUM EFFICIENCY ♦ SOLIDS ♦ SPECTRA ♦ THERMOLUMINESCENCE ♦ THERMOLUMINESCENT DOSEMETERS ♦ YTTRIUM BORIDES
Abstract Highly crystalline phase of YBO{sub 3}:Eu{sup 3+} phosphors were prepared by solid state reaction. The phosphor shows characteristic {sup 5}D{sub 0}→{sup 7}F{sub 1} (J = 1, 2, 3, 4) transition for Eu{sup 3+}. Phase purity, and emission intensity increases with increase in the annealing temperature and corresponding Eu-O charge transfer band shows blue shift in excitation spectrum. Color purity, determined in terms of R/O ratio, was found to be 1.42 (CIE color coordinates x = 0.62, y = 0.36). According to the luminescence decay analysis the {sup 5}D{sub 0} level of Eu{sup 3+} lifetime is around 5 ms and quantum efficiency is 72%. Thermo-luminescence (TL) spectra of the sample reveal three broad peaks between 80 and 240°C.
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-05-23
Publisher Place United States
Volume Number 1731
Issue Number 1


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