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Ce3+/Tb3+ activated GdF3, KGdF4, and CeF3 submicro/nanocrystals: Synthesis, phase evolution, and optical properties

Published online by Cambridge University Press:  23 November 2011

Chunyan Cao ,
Hyun Kyoung Yang ,
Jong Won Chung ,
Byung Kee Moon ,
Byung Chun Choi ,
Jung Hyun Jeong  and
Kwang Ho Kim
Chunyan Cao
Affiliation:
Department of Physics, Pukyong National University, Busan 608-737, Korea; and College of Mathematics and Physics, Jinggangshan University, Ji’an 343009, China
Hyun Kyoung Yang
Affiliation:
Department of Physics, Pukyong National University, Busan 608-737, Korea
Jong Won Chung
Affiliation:
Department of Physics, Pukyong National University, Busan 608-737, Korea
Byung Kee Moon
Affiliation:
Department of Physics, Pukyong National University, Busan 608-737, Korea
Byung Chun Choi
Affiliation:
Department of Physics, Pukyong National University, Busan 608-737, Korea
Jung Hyun Jeong*
Affiliation:
Department of Physics, Pukyong National University, Busan 608-737, Korea
Kwang Ho Kim
Affiliation:
School of Materials Science and Engineering, Pusan National University, Busan 609-735, Korea
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Based on a citric acid-assisted hydrothermal method, series of Ce3+/Tb3+ activated fluorides have been synthesized. By controlling the amount of KNO3, the final products evolve from the Ce3+/Tb3+ codoped orthorhombic phase GdF3 to the Ce3+/Tb3+ codoped cubic phase KGdF4. The concentration of Ce3+ has great effects on the crystalline phases and the morphologies of final products. The Ce3+ concentration dependent samples illustrate the appearance of the hexagonal phase solid solution CeF3–GdF3–TbF3 in the final products. When the Ce3+ concentration is 20 mol%, the sample Ce20 presents the hexagonal phase CeF3 but the diffraction peaks move to higher degree. The x-ray diffraction patterns suggest the phase evolution of final products, the field emission scanning electron microscopy images present the variation in morphology of samples, and the photoluminescence excitation and emission spectra as well as the luminescent dynamic curves illustrate the optical properties of samples.

Keywords

HydrothermalPhase transformationOptical properties
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 23 , 14 December 2011 , pp. 2916 - 2923
Copyright
Copyright © Materials Research Society 2011

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