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Processing effect on the luminescence and raman spectra of Gd1−xVO4:Eux3+ phosphors

Published online by Cambridge University Press:  31 January 2011

Minkee Kim  and
Shinhoo Kang
Minkee Kim
Affiliation:
Department of Materials Science and Engineering, Seoul National University, Kwanak-ku, Seoul 151-742, South Korea
Shinhoo Kang*
Affiliation:
Department of Materials Science and Engineering, Seoul National University, Kwanak-ku, Seoul 151-742, South Korea
*
a)Address all correspondence to this author. e-mail: shinkang@snu.ac.kr
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Abstract

Nano-sized Eu3+-activated Gd1−xVO4 phosphors were prepared via hydrothermal reaction coupled with the coprecipitation method at a low temperature (230 °C). The coprecipitation provided chemical homogeneity. However, it resulted in a low crystallinity and reduced emission and excitation characteristics. Raman study showed that Gd–O bond lengths changed in powders, depending on the level of crystallinity. The particle morphology was controlled using ethylenediaminetetra-acetic acid during the hydrothermal reaction. Particle shapes in the nano-size range affected the vibration of atoms in the lattice, changing photoluminescence properties.

Keywords

HydrothermalRaman spectroscopyLuminescence
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 8 , August 2007 , pp. 2288 - 2296
Copyright
Copyright © Materials Research Society 2007

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