Optical Studies of Tb3+ Doped Boro-Alumina-Silicate Glass
Tb<3+> doped boro-alumina-silicate glasses were synthesized in air by high temperature process. Optical absorption, emission and excitation spectra of the glasses have been measured. Effect of concentration quenching on the lifetime and fluorescence yield of <5>D<,3> and <5>D<,4> level has been discussed. The absorption spectrum shows four poor peaks in the UVVis region. With excitation at 377nm, the fluorescence spectrum of the sample has four major emission bands at 488, 542, 584 and 621nm, which correspond to the <5>D<,4>→<7>F<,j>(j=6, 5, 4, 3) transitions respectively. The emission from the <5>D<,3>→<7>F<,j>(j=5, 4, 3) transitions around 415, 437 and 458nm are very feeble. When Tb<3+> concentration beyond a particular value (2％, mole fraction), the concentration quenching phenomenon of <5>D<,3> state occurred, due to the dipole-dipole interaction among the Tb<3+>. The energy transfer process (<5>D<,3>+<7>F<,6>→<5>D<,4>+<7>F<,0>) leads to a high quenching concentration (up to 20％) of <5>D<,4> state. The lifetime of <5>D<,4> level in boro-alumina-silieate glass is about 3ms that can be used for new type of long-lasting phosphorescence device.
boro-alumina-silicate glass Tb ions luminescence concentration quenching energy transfer rare earths
Zhang Yan(张焱) Xu Zhongzi(许仲梓) Lu Chunhua(陆春华) Ni Yaru(倪亚茹)
College of Materials Science & Technology, Nanjing University of Technology, Nanjing Jiangsu 210009, China
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
345-349
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）