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Title: The influence of auxiliary codopants on persistent phosphor Sr{sub 2}P{sub 2}O{sub 7}:Eu{sup 2+},R{sup 3+} (R = Y, La, Ce, Gd, Tb and Lu)

Graphical abstract: Rare earth ions which close to the line are good codopants. - Highlights: • The persistent luminescence in Sr{sub 2}P{sub 2}O{sub 7}:Eu{sup 2+},R{sup 3+} was reported. • Sr{sub 2}P{sub 2}O{sub 7}:Eu{sup 2+},Lu{sup 3+} shows the best performance. • The influence of auxiliary codopants was discussed in terms of ionic potential and ionic radius. - Abstract: We investigate the persistent luminescence in europium-doped strontium pyrophosphate upon codoping with auxiliary rare earth ions. The persistent phosphors are synthesized via solid-state reaction method under flowing N{sub 2} + H{sub 2}. Under UV irradiation, broadband emission persistent luminescence located at 420 nm is observed in all of these phosphors at room temperature. The effects of auxiliary rare earth ions on Sr{sub 2}P{sub 2}O{sub 7}:Eu{sup 2+} are discussed according to the decay curves and thermoluminescence spectra. Sr{sub 2}P{sub 2}O{sub 7}:Eu{sup 2+},Lu{sup 3+} shows the best performance, while and La{sup 3+} and Ce{sup 3+} codoped samples are the weakest. The influence of auxiliary codopants is discussed in terms of ionic potential and ionic radius. We derive an empirical formula based on the experimental results.
Authors:
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Publication Date:
OSTI Identifier:
22285208
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal Issue: 11; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CERIUM IONS; DOPED MATERIALS; EUROPIUM; EUROPIUM IONS; GADOLINIUM COMPLEXES; LANTHANUM IONS; LUTETIUM IONS; PHOSPHORS; PHOSPHORUS; SPECTRA; STRONTIUM; SYNTHESIS; THERMOLUMINESCENCE; YTTRIUM