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Sol-gel composing hybrid precursors to synthesize REBO3: Ln3+（RE = Y, Gd; Ln = Eu, Tb）submicrometer phosphors

BING YAN1,* , CHONG WANG1

Affiliation

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

Abstract

REBO3 (RE = Y, Gd) submicrometer phosphors doped with different content of Eu3+ and Tb3+ were synthesized by a modified sol-gel technology. Through the sol-gel process of borate source (tri-n-butyl borate, abbreviated as TBB), rare earth coordination polymers of salicylate and polyethyl glycol (PEG) were in-situ assembled to hybrid precursors. After the thermal decomposition of these hybrid polymeric precursors, the solid phosphors can be obtained, whose microstructure and particle sizes may be controlled by the hybrid precursors. X-ray diffraction (XRD) indicates these phosphors present hexagonal phase with vaterite-type structure. Scanning electron microscopy (SEM) suggests they show uniform size with submicrometer grains of around 100 − 300 nm. The photoluminescent behavior of these phosphors with different Eu3+ and Tb3+ ions concentration (1, 3, 5, 7, 8 mol %, respectively) were studied in details. The orange to red emission intensities ratios exhibit different behavior for different host of YBO3 and GdBO3..

Keywords

Sol-gel synthesis, Luminescence, Phosphors, REBO3:Ln3+.

Submitted at: April 17, 2007
Accepted at: Aug. 18, 2007

Citation

BING YAN, CHONG WANG, Sol-gel composing hybrid precursors to synthesize REBO3: Ln3+（RE = Y, Gd; Ln = Eu, Tb）submicrometer phosphors, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 8, pp. 2560-2565 (2007)