Particle size control of a monodisperse spherical Y2O3 : Eu3+ phosphor and its photoluminescence properties

A monodisperse spherical Y2O3:Eu3+ phosphor was prepared by a homogeneous precipitation method. The mean size of the phosphor particles (MSPP) was successfully controlled by changing the volume ratio of normal alcohol (RA) (propanol) in the solvents mixed between deionized water and normal propanol. When the RA was increased from 0 to 0.7, the MSPP decreased while maintaining a high yield of > 95%. Although the prepared phosphor samples were fired at the same temperature, the thermal energy was delivered more efficiently into the inner side of the phosphor particles with the decrease of the MSPP. Therefore, the crystallinity and also the photoluminescence (PL) intensity of the phosphor increased with the decrease in the MSPP. In addition, because the numbers of Eu3+ ions located near the particle surfaces increased with the decrease of particle size, the ratio of PL intensity caused by the (5)Do-F-7(2) transition to that caused by D-5(0)-F-7(1) transition increased from 10.8 to 12.7 with the decrease in MSPP.
Publisher
MATERIALS RESEARCH SOCIETY
Issue Date
2007-07
Language
ENG
Keywords

RARE-EARTH IONS; THERMAL HYDROLYSIS; SPRAY-PYROLYSIS; NANOPARTICLES; INTENSITIES; MORPHOLOGY; SPECTRA; SOLVENT; Y2O3EU; TICL4

Citation

JOURNAL OF MATERIALS RESEARCH, v.22, no.7, pp.2017 - 2024

ISSN
0884-2914
DOI
10.1557/jmr.2007.0257
URI
http://hdl.handle.net/10203/1518
Appears in Collection
MS-Journal Papers(저널논문)
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