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Title: Effect of replacement of Ca by Ln (Ln = Y, Gd) on the structural and luminescence properties of CaWO{sub 4}:Eu{sup 3+} red phosphors prepared via co-precipitation

Abstract

Highlights: ► Y and Gd replace Ca ions in CaWO{sub 4}:Eu{sup 3+} structure as Ca{sub 1−x}Ln{sub x}WO{sub 4}:Eu{sup 3+}. ► Ca{sub 1−x}Ln{sub x}WO{sub 4}:Eu{sup 3+} phosphor is prepared by co-precipitation with NH{sub 4}HCO{sub 3}–NH{sub 3}·H{sub 2}O. ► {sup 5}D{sub 0}–{sup 7}F{sub 1–3} transitions of Eu{sup 3+} ions shows a red emission at about 614 nm. ► With Y and Gd added in host, the luminescent intensity is obviously improved. -- Abstract: Eu{sup 3+}-doped calcium based tungstate, Ca{sub 1−x}Ln{sub x}WO{sub 4}:Eu{sup 3+} (Ln = Y, Gd) red-emitting phosphors were prepared by co-precipitation method with NH{sub 4}HCO{sub 3}–NH{sub 3}·H{sub 2}O system as the precipitating aid agent. X-ray diffraction results reveal that the synthesized Ca{sub 1−x}Ln{sub x}WO{sub 4}:Eu{sup 3+} have scheelite structure with pure phase. Infrared spectra show strong absorption peaks between 803 and 440 cm{sup −1} which are assigned to the vibration of O–W in WO{sub 4}{sup 2−} tetrahedron. The Energy Disperse Spectroscopy analysis reveals that the red phosphors have been successfully prepared by co-precipitation method according to theoretic ratio. Due to the {sup 5}D{sub 0}–{sup 7}F{sub 1–3} transitions of Eu{sup 3+} ions, photoluminescence spectra show a red emission at about 614 nm under excitation of 395 nm (commercial ultraviolet) and 465more » nm (blue chip). With Ln lanthanide added in host, the luminescent intensity of Ca{sub 1−x}Ln{sub x}WO{sub 4}:Eu{sup 3+} (x = 0.4, 0.5) is obviously improved comparing with that of CaWO{sub 4}:Eu{sup 3+} by several times.« less

Authors:
 [1];  [1];  [2];  [1]
  1. Department of Materials Science and Engineering, Chengdu University of Technology, Chengdu 610059 (China)
  2. Department of Information and Management Science, Chengdu University of Technology, Chengdu 610059 (China)
Publication Date:
OSTI Identifier:
22215588
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 47; Journal Issue: 11; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; ABSORPTION SPECTROSCOPY; CALCIUM IONS; CALCIUM TUNGSTATES; DOPED MATERIALS; EUROPIUM IONS; INFRARED SPECTRA; PHOTOLUMINESCENCE; SYNTHESIS; X-RAY DIFFRACTION

Citation Formats

Zhang, Wentao, Long, Jianping, E-mail: longjp001@126.com, Fan, Andong, and Li, Junfeng. Effect of replacement of Ca by Ln (Ln = Y, Gd) on the structural and luminescence properties of CaWO{sub 4}:Eu{sup 3+} red phosphors prepared via co-precipitation. United States: N. p., 2012. Web. doi:10.1016/J.MATERRESBULL.2012.06.075.
Zhang, Wentao, Long, Jianping, E-mail: longjp001@126.com, Fan, Andong, & Li, Junfeng. Effect of replacement of Ca by Ln (Ln = Y, Gd) on the structural and luminescence properties of CaWO{sub 4}:Eu{sup 3+} red phosphors prepared via co-precipitation. United States. doi:10.1016/J.MATERRESBULL.2012.06.075.
Zhang, Wentao, Long, Jianping, E-mail: longjp001@126.com, Fan, Andong, and Li, Junfeng. Thu . "Effect of replacement of Ca by Ln (Ln = Y, Gd) on the structural and luminescence properties of CaWO{sub 4}:Eu{sup 3+} red phosphors prepared via co-precipitation". United States. doi:10.1016/J.MATERRESBULL.2012.06.075.
@article{osti_22215588,
title = {Effect of replacement of Ca by Ln (Ln = Y, Gd) on the structural and luminescence properties of CaWO{sub 4}:Eu{sup 3+} red phosphors prepared via co-precipitation},
author = {Zhang, Wentao and Long, Jianping, E-mail: longjp001@126.com and Fan, Andong and Li, Junfeng},
abstractNote = {Highlights: ► Y and Gd replace Ca ions in CaWO{sub 4}:Eu{sup 3+} structure as Ca{sub 1−x}Ln{sub x}WO{sub 4}:Eu{sup 3+}. ► Ca{sub 1−x}Ln{sub x}WO{sub 4}:Eu{sup 3+} phosphor is prepared by co-precipitation with NH{sub 4}HCO{sub 3}–NH{sub 3}·H{sub 2}O. ► {sup 5}D{sub 0}–{sup 7}F{sub 1–3} transitions of Eu{sup 3+} ions shows a red emission at about 614 nm. ► With Y and Gd added in host, the luminescent intensity is obviously improved. -- Abstract: Eu{sup 3+}-doped calcium based tungstate, Ca{sub 1−x}Ln{sub x}WO{sub 4}:Eu{sup 3+} (Ln = Y, Gd) red-emitting phosphors were prepared by co-precipitation method with NH{sub 4}HCO{sub 3}–NH{sub 3}·H{sub 2}O system as the precipitating aid agent. X-ray diffraction results reveal that the synthesized Ca{sub 1−x}Ln{sub x}WO{sub 4}:Eu{sup 3+} have scheelite structure with pure phase. Infrared spectra show strong absorption peaks between 803 and 440 cm{sup −1} which are assigned to the vibration of O–W in WO{sub 4}{sup 2−} tetrahedron. The Energy Disperse Spectroscopy analysis reveals that the red phosphors have been successfully prepared by co-precipitation method according to theoretic ratio. Due to the {sup 5}D{sub 0}–{sup 7}F{sub 1–3} transitions of Eu{sup 3+} ions, photoluminescence spectra show a red emission at about 614 nm under excitation of 395 nm (commercial ultraviolet) and 465 nm (blue chip). With Ln lanthanide added in host, the luminescent intensity of Ca{sub 1−x}Ln{sub x}WO{sub 4}:Eu{sup 3+} (x = 0.4, 0.5) is obviously improved comparing with that of CaWO{sub 4}:Eu{sup 3+} by several times.},
doi = {10.1016/J.MATERRESBULL.2012.06.075},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 11,
volume = 47,
place = {United States},
year = {2012},
month = {11}
}