Effects of Y concentration on luminescence properties of PbWO4 single crystals

✍ Scribed by Jianjun Xie; Jingying Liao; Zhengsong Geng; Chongzhi Ye; Hui Yuan; Wei Xiong; Dunhua Cao; Zhonggui Zhan; Liang Chen; Bingfu Shen; Zhiwen Yin

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 383 KB
• Volume: 130
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/j.mseb.2006.02.040

✦ Synopsis

The effects of Y 3+ doping at different concentration on the luminescnece properties of PbWO 4 crystals have been investigated by means of Fourier transform infrared (FT-IR) spectrum, optical transmission, thermoluminescence (TL), X-ray excited luminescence (XEL), photoluminescence (PL) under excitation of UV light and light yield measurements. The series PbWO 4 :Y crystal samples were grown by modified Bridgman method and the concentration of Y 3+ in the melt was in the range of 0-1.0 mol%. The slight blue-shift and evident red-shift of the absorption edge in PbWO 4 crystal were observed at low and heavy doping concentration, respectively. TL peaks in the range of from room temperature to 250 • C disappeared after the doping with Y 3+ . With the increase of doping concentration, the luminescence intensity in the XEL and PL spectra was found to decrease accordingly, especially in the case of heavy doping. The measuring results demonstrate that Y 3+ doping concentration below 100 ppm in the crystal seems to be the best for optimizing the optical and scintillation properties of the material. The mechanism of Y 3+ doping concentration influence on luminescence was also discussed in this paper.