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Sol-gel synthesis and characterization of rare-earth doped pure and Gd-substituted YAG

JUNJIE WU1, BING YAN1,*

Affiliation

  1. Department of Chemistry, Tongji University, Shanghai 200092, China

Abstract

YAG: RE3+ (RE= Ce, Tb) and Y3-xGdxAl5O12: Tb3+ was synthesized by a hybrid precursor assembly sol-gel technology. We get hydroxide sol solutions by stoichiometric aluminum, yttrium, terbium and cerium nitrates, at the same time investigated the relationship between the sol formed and experiment variable including PH, temperature, concentration, and so on. The particle size of luminescent materials is about 100 nm characterized by XRD and especially SEM shows .The co-doping Gd3+ and Y3+ can’t change the crystalline structure in Y3-XGdxAl5O12: Tb3+, it also formed the pure-phase YAG. The photoluminescence property of YAG: Tb3+ and Y3-xGdxAl5O12: Tb3+ was compared to investigate as a function of Tb3+ ions concentration, which revealed that these phosphors showed the quenching emission for high concentration sample. YAG: Ce3+showed broad emission peaks in the range 480-620 nm and its photoluminescence intensity change alternately with continuous increase in the concentration of Ce3+..

Keywords

Sol-gel synthesis, Photoluminescence, Hybrid precursors, Phosphors, Rare earth aluminate.

Submitted at: Nov. 16, 2006
Accepted at: Aug. 18, 2007

Citation

JUNJIE WU, BING YAN, Sol-gel synthesis and characterization of rare-earth doped pure and Gd-substituted YAG, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 8, pp. 2555-2559 (2007)