Chem. J. Chinese Universities ›› 2004, Vol. 25 ›› Issue (1): 11.

• Articles • Previous Articles     Next Articles

Synthesis of Spherical YBO3∶Eu Phosphors by Spray Pyrolysis Method

WANG Lie-Song, LIN Jun, ZHOU Yong-Hui   

  1. Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2003-04-24 Online:2004-01-24 Published:2004-01-24

Abstract: Non-aggregated and spherical YBO3∶Eu phosphor particles with a narrow size distribution(1—2 μm) were first prepared by a two-step spray pyrolysis process. The effects of PEG concentration on the phosphor morphology and emission intensity, the annealing temperature on the crystallinity, the precursor concentration on the particle size and the doping concentration of Eu3+ on the emission intensity were investigated, respectively. The phosphor particle size can be controlled by changing the concentrations of precursor and PEG. Solid and spherical phosphor particles with a size of 1—2 μm were obtained with a certain precursor concentration (0.07 mol/L) and PEG concentration (0.04 mol/L), and the aggregation between particles did not appear even after annealing at a high temperature. Higher or lower concentration of PEG makes the phosphor particles broken or hollow, which will low the emission intensity. The results of XRD indicate that the powders begin to crystallize at 700 ℃ and completely crystallized at 1 100 ℃, and the optimum concentration for Eu3+ was determined to be 10%(molar fraction) of Y3+ in YBO3 host lattices.

Key words: Luminescence, Spray pyrolysis, Spherical phosphor, Yttrium borate, Europium

CLC Number: 

TrendMD: