The Effects of Heat Treatment on the Crystallinity and Luminescence Properties of YInGe2O7 Doped with Eu3+ Ions View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2008-07

AUTHORS

Yee-Shin Chang

ABSTRACT

Yttrium indium germanate, YInGe2O7, doped with Eu3+ ions was synthesized by a solid-state reaction using a vibrating mill with metal oxides. The compound was characterized and its optical properties were investigated. The yielded powders were heated at various temperatures from 1100°C to 1400°C in air for 10 h. The X-ray diffraction profiles showed that all peaks could be attributed to the monoclinic YInGe2O7 phase at the various calcination temperatures for YInGe2O7 doped with 5 mol.% Eu3+ ions. A second phase of In2O3 was observed in the X-ray powder diffractometry pattern when the calcination temperature was over 1200°C. Scanning electron microscopy showed that the particle sizes increased significantly with increasing calcination temperature. The calcined powders emitted a reddish luminescence centered at 611 nm under excitation of 393 nm due to the electric dipole transition 5D0 → 7F2. Powders fired at 1200°C were found to have the maximum photoluminescent intensity for YInGe2O7 doped with 5 mol.% Eu3+ ions. Furthermore, the existence of the second phase caused the decay time to decrease with increasing calcination temperature. More... »

PAGES

1024-1028

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11664-008-0470-z

DOI

http://dx.doi.org/10.1007/s11664-008-0470-z

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1025065273


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