The synthesis and optical property of solid-state-prepared YAG:Ce phosphor by a spray-drying method

Journal Article · Wed May 06 04:00:00 EDT 2009 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2008.10.006· OSTI ID:21199767

Lee, H -M; Cheng, C -C ^[1]

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1. Department of Resources Engineering, National Cheng Kung University, No. 1 University Road, Tainan 70101, Taiwan (China)

Ce{sup 3+}-activated yttrium aluminum garnet (Y{sub 3}Al{sub 5}O{sub 12}:Ce, YAG:Ce) powder as luminescent phosphor was synthesized by the solid-state reaction method. The phase identification, microstructure and photoluminescent properties of the products were investigated by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), absorption spectrum and photoluminescence (PL) analysis. Spherical phosphor particle is considered better than irregular-shaped particle to improve PL property and application, so this phosphor was granulated into a sphere-like shape by a spray-drying device. After calcinating at 1500 deg. C for 0, 4, and 8 h, the product was identified as YAG and CeO{sub 2} phases. The CeO{sub 2} phase content is decreased by increasing the calcination time or decreasing the Ce{sup 3+} doping content. The product showed higher emission intensity resulted from more Ce{sup 3+} content and larger grain size. The product with CeO{sub 2} was found to have lower emission intensity. This paper presents the crystal structures of Rietveld refinement results of powder XRD data.

• OSTI ID: 21199767
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 5 Vol. 44; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTRA
ALUMINIUM COMPOUNDS
CALCINATION
CERIUM IONS
CERIUM OXIDES
CRYSTAL STRUCTURE
GARNETS
GRAIN SIZE
OPTICAL PROPERTIES
PHOTOLUMINESCENCE
SCANNING ELECTRON MICROSCOPY
SPRAY DRYING
SYNTHESIS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS