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Preparation and Characterization of Garnet Phosphor Nanoparticles Derived from Oxalate Coprecipitation

✍ Scribed by Teng-Ming Chen; S.C. Chen; Chao-Jung Yu

Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 183 KB
Volume: 144
Category: Article
ISSN: 0022-4596
DOI: 10.1006/jssc.1999.8202

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✦ Synopsis

Terbium-activated Y 3 Al 5 O 12 (YAG : Tb) phosphor nanoparticles with homogeneous grain size and crystallinity have been prepared at 10003 3C by heat treatment of a metal oxalate precursor derived from an alkaline coprecipitation route. The di4raction pro5le of as-prepared YAG : Tb nanoparticles can be indexed as a garnet structure and exhibits peak broadening phenonmenon, as revealed by X-ray di4raction (XRD) data. Grains of YAG : Tb nanoparticles appear to be irregularly spherical or elliptical and their sizes range from 60 to 70 nm, as indicated by morphological studies from bright-5eld transmission electron microscopy (TEM) imaging. Furthermore, the photoluminescence (PL) spectra of the (Y 2.9 Tb 0.1 )Al 5 O 12 phase were investigated to determine the energy level of electron transition related to luminescence processes and the possible blue shift in the excitation or emission PL spectra.

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