J4 ›› 2014, Vol. 31 ›› Issue (6): 641-647.

• Spectrascopy •     Next Articles

Modulation and enhancement of luminescence of BaY2Si3O10: Eu3+ phosphor through energy transfer by Bi3+co-doping

CUI Yue-peng,HU Zheng-fa*, YE Ding-hua, ZHANG Wei*, SHENG Xia, LUO Li, WANG Yin-hai   

  1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology,Guangzhou 510006, China
  • Received:2014-03-11 Revised:2014-05-14 Published:2014-11-28 Online:2014-11-17

Abstract: Phosphors BaY2Si3O10: Bi3+(Eu3+) were synthesized by solid – state reaction method. Their phase and optical properties were analysed by using X-ray powder diffractionmeter and fluorescence spectrometer, respectively. The photoluminescence excitation (PLE) spectra of BaY2Si3O10: Eu3+ consist of an enhanced broad charge transfer band (CTB) ranged 200-350 nm from O2– to Eu3+, and the 5D0 ? 7FJ (J=1 centered at 592 nm orange, J=2 at 615 nm red) transitions of Eu3+ present the typical orange-red emission band. When phosphors were excited by 285 nm light, the spectral overlap of emission band of Bi3+ and excitation spectra of Eu3+ demonstrated the energy transfer from Bi3+ to Eu3+ that positively enhance the orange-red luminescence of Eu3+ in BaY2Si3O10: Eu3+. The optimized doping is 0.08 mol% for Bi3+ and 0.4 mol% for Eu3+. The critical transfer distance was calculated to be 1.604 nm, and the concentration quenching mechanism was mainly due to the electric quadrapole – quadrapole interactions.

Key words: Materials, Phosphor, High temperature solid-state reaction, Bi3+,Eu3+ co-coped, BaY2Si3O10