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Structure, Luminescence, and Transport Properties of EuVO_4

Li, Li-Ping and Li, Guang-She and Xue, Yan-Feng and Inomata, Hiroshi (2001) Structure, Luminescence, and Transport Properties of EuVO_4. Journal of the Electrochemical Society, 148 (9). J45-J49. ISSN 0013-4651.

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Metastable scheelite EuVO_4 was stabilized by a high temperature and pressure method, which was transformed into a stable zircon phase by annealing treatment in air. Scheelite EuVO_4 gave strong emissions with a dominant peak at 617 nm associated with the ^(5)D_0-^(7)F_2 transition of Eu^(3+). ^(151)Eu Mössbauer spectra indicated that the isomer shift for the metastable scheelite phase was ca. 0.5 mm/s lower than that for the zircon phase, which was ascribed to a reduced covalency in the Eu-O bond originated via a charge transfer from oxygen to Eu3+ in scheelite lattice by producing an enhanced shielding of 4f electrons on the s orbital as well as a decrease in s electron density around Eu^(3+) nucleus. Impedance spectra for the zircon phase clearly demonstrated an ionic hopping in the bulk with a conductivity of ca. 1.0×10^(–3) S cm^(–1) at 500°C. EuVO_4 is proved to be both a potential phosphor and a potential ionic conductor.

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Additional Information:© 2001 Electrochemical Society. Received February 26, 2001; published July 30, 2001. This work was financially supported by a fund of NSFC (no. 19804005) (L.L.). The Japanese Ministry of Education, Sceince, Sports, and Culture assisted in meeting the publication costs of this article.
Funding AgencyGrant Number
National Natural Science Foundation of China19804005
Subject Keywords:europium compounds; crystal structure; annealing; luminescence; Mossbauer effect; isomer shift; charge transfer states, phosphors, ionic conductivity, hopping conduction, high-pressure solid-state phase transformations
Classification Code:PACS: 61.66.Fn; 81.05.Je; 78.55.Hx; 66.30.Hs; 61.50.Ks; 64.70.Kb; 81.30.Hd; 81.40.Gh; 78.60.-b; 76.80.+y
Record Number:CaltechAUTHORS:20111116-111401506
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Official Citation:Structure, Luminescence, and Transport Properties of EuVO[sub 4] Li-Ping Li, Guang-She Li, Yan-Feng Xue, and Hiroshi Inomata, J. Electrochem. Soc. 148, J45 (2001), DOI:10.1149/1.1388633
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:27811
Deposited By: Jason Perez
Deposited On:16 Nov 2011 21:43
Last Modified:02 Jun 2017 23:36

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