Regular Paper

[OPTICAL REVIEW Vol. 21, No. 4 (2014) 455-460]
© 2014 The Japan Society of Applied Physics

Synthesis and Luminescence Properties of Eu3+,Bi3+-Doped BaWO4 Phosphors

Pingsheng YU1*, Liangbi SU2, and Jun XU2

1School of Materials Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China
2Key Laboratory of Transparent and Opto-Functional Inorganic Materials, Chinese Academy of Sciences, Shanghai Institute of Ceramics, Shanghai 200050, China

(Received February 3, 2014; Revised May 1, 2014; Accepted May 20, 2014)

BaWO4:Eu3+,Bi3+ phosphors have been prepared by the conventional high-temperature solid-state reaction and chemical precipitation. The materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence (PL) technologies. When the phosphors are prepared by the high-temperature solid-state reaction, Bi3+ doping into BaWO4:Eu3+ can increase the emission intensity of 613 nm. However, maximum emission at about 595 nm was observed in Eu3+,Bi3+-doped BaWO4 phosphors prepared by the chemical precipitation. The decay constants (monitored at 595 and/or 613 nm) are within 45–100 s. The color purity of the Ba0.865WO4:Eu0.11,Bi0.025 phosphor (prepared by chemical precipitation) was 100%. The emission mechanism of Eu3+,Bi3+ in the BaWO4 phosphors is briefly discussed.

Key words: BaWO4, Eu3+,Bi3+, phosphors

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