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Title: Dual preparation of hydrophobic and hydrophilic BaWO{sub 4}:Eu phosphors

Abstract

Highlights: • Red-emitting BaWO{sub 4}:Eu phosphors were prepared in hexane-water bilayer system. • The hydrophobic nanometer-sized BaWO{sub 4}:Eu phosphors were obtained in hexane. • The hydrophilic micrometer-sized BaWO{sub 4}:Eu dendrites were obtained in water. - Abstract: BaWO{sub 4}:Eu phosphors were prepared by performing a solvothermal reaction in a water–hexane bilayer system. A barium oleate (and europium oleate) complex was obtained in hexane via a phase transfer reaction involving Ba{sup 2+} (and Eu{sup 3+}) ions in an aqueous solution of sodium oleate. The outer surfaces of the nanometer-sized BaWO{sub 4}:Eu phosphors were capped by the long alkyl chain of oleate; therefore, the hydrophobic nanometer-sized BaWO{sub 4}:Eu phosphors preferentially dissolved in the hexane layer. The micrometer-sized BaWO{sub 4}:Eu phosphors were obtained in the water layer. The BaWO{sub 4}:Eu phosphors prepared in hexane and water yielded sharp strong absorption and emission peaks at 464 and 615 nm, respectively, due to the {sup 7}F{sub 0} → {sup 5}D{sub 2} and the {sup 5}D{sub 0} →{sup 7} F{sub 2} transitions of the Eu{sup 3+} ions. The BaWO{sub 4}:Eu phosphors are good candidate red-emitting phosphors for use in InGaN blue-emitting diodes, which have an emission wavelength of 465 nm.

Authors:
;
Publication Date:
OSTI Identifier:
22581556
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 78; Other Information: Copyright (c) 2016 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; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTRA; AQUEOUS SOLUTIONS; BARIUM IONS; BARIUM TUNGSTATES; EMISSION SPECTRA; EUROPIUM COMPOUNDS; EUROPIUM IONS; GALLIUM NITRIDES; HEXANE; INDIUM COMPOUNDS; LAYERS; PHOSPHORS; SODIUM COMPOUNDS; WATER

Citation Formats

Cho, Young-Sik, and Huh, Young-Duk, E-mail: ydhuh@dankook.ac.kr. Dual preparation of hydrophobic and hydrophilic BaWO{sub 4}:Eu phosphors. United States: N. p., 2016. Web. doi:10.1016/J.MATERRESBULL.2016.02.020.
Cho, Young-Sik, & Huh, Young-Duk, E-mail: ydhuh@dankook.ac.kr. Dual preparation of hydrophobic and hydrophilic BaWO{sub 4}:Eu phosphors. United States. doi:10.1016/J.MATERRESBULL.2016.02.020.
Cho, Young-Sik, and Huh, Young-Duk, E-mail: ydhuh@dankook.ac.kr. Wed . "Dual preparation of hydrophobic and hydrophilic BaWO{sub 4}:Eu phosphors". United States. doi:10.1016/J.MATERRESBULL.2016.02.020.
@article{osti_22581556,
title = {Dual preparation of hydrophobic and hydrophilic BaWO{sub 4}:Eu phosphors},
author = {Cho, Young-Sik and Huh, Young-Duk, E-mail: ydhuh@dankook.ac.kr},
abstractNote = {Highlights: • Red-emitting BaWO{sub 4}:Eu phosphors were prepared in hexane-water bilayer system. • The hydrophobic nanometer-sized BaWO{sub 4}:Eu phosphors were obtained in hexane. • The hydrophilic micrometer-sized BaWO{sub 4}:Eu dendrites were obtained in water. - Abstract: BaWO{sub 4}:Eu phosphors were prepared by performing a solvothermal reaction in a water–hexane bilayer system. A barium oleate (and europium oleate) complex was obtained in hexane via a phase transfer reaction involving Ba{sup 2+} (and Eu{sup 3+}) ions in an aqueous solution of sodium oleate. The outer surfaces of the nanometer-sized BaWO{sub 4}:Eu phosphors were capped by the long alkyl chain of oleate; therefore, the hydrophobic nanometer-sized BaWO{sub 4}:Eu phosphors preferentially dissolved in the hexane layer. The micrometer-sized BaWO{sub 4}:Eu phosphors were obtained in the water layer. The BaWO{sub 4}:Eu phosphors prepared in hexane and water yielded sharp strong absorption and emission peaks at 464 and 615 nm, respectively, due to the {sup 7}F{sub 0} → {sup 5}D{sub 2} and the {sup 5}D{sub 0} →{sup 7} F{sub 2} transitions of the Eu{sup 3+} ions. The BaWO{sub 4}:Eu phosphors are good candidate red-emitting phosphors for use in InGaN blue-emitting diodes, which have an emission wavelength of 465 nm.},
doi = {10.1016/J.MATERRESBULL.2016.02.020},
journal = {Materials Research Bulletin},
number = ,
volume = 78,
place = {United States},
year = {Wed Jun 15 00:00:00 EDT 2016},
month = {Wed Jun 15 00:00:00 EDT 2016}
}