The luminescence properties of Sr_3Gd(BO_3)_3:Tb~(3+) phosphors under vacuum ultraviolet excitation

• 来源期刊: 科学通报(英文版)
• 学科: 工学
• 年，卷（期）: 2012,（34）
• 页码范围: 4513-4516
• 页数: 4页
• 分类号: TN104.3
• 语种: 中文

摘要

Tb3+-activated Sr3Gd(BO3)3 green phosphors were prepared by conventional solid-state reaction. The vacuum ultraviolet (VUV) excitation, photoluminescence (PL) and decay properties of the phosphors in the visible range were investigated. The excitation spectrum showed a strong broad band from 160 to 200 nm with a maximum at 183 nm which was adjacent to the VUV excitation light source of 172 nm. Under excitation at 172 nm, the optimum co-doping concentration of Tb3+ was 10 mol%, and the emission intensity of Sr3Gd0.9(BO3)3:0.1Tb3+ was comparable to that of commercial Zn2SiO4:Mn2+. The strongest emission peak of Sr3Gd0.9(BO3)3:0.1Tb3+ was at 543 nm with chromaticity coordinates of (0.2626, 0.4922) and a lifetime of 2.32 ms. The optical properties of the green phosphor Sr3Gd(BO3)3:Tb3+ make it suitable for use in Hg-free fluorescent lamps and plasma display panels.