Cooperative near-infrared quantum cutting in Tb3+, Yb3+ codoped polyborates La0.99-xYbxBaB9O16:Tb0.01

被引：34
|
作者：
Wang, Yuhua [1 ]
Xie, Lechun [1 ]
Zhang, Huijuan [1 ]
机构：
[1] Lanzhou Univ, Dept Mat Sci, Sch Phys Sci & Technol, Lanzhou 730000, Gansu, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2009年 / 105卷 / 02期
关键词：
barium compounds; doping profiles; energy gap; lanthanum compounds; phosphors; photoluminescence; radiative lifetimes; terbium; ytterbium compounds; DOWN-CONVERSION; DOWNCONVERSION; LUMINESCENCE; LN;
D O I：
10.1063/1.3056382
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The experimental identification of cooperative energy transfer from Tb3+ to Yb3+ has been presented by the photoluminescence properties of La0.99-xYbxBaB9O16:Tb-0.01 and the mean decay lifetime curves of the D-5(4) emission of Tb3+. Near-infrared quantum cutting involving the F-2(5/2)-> F-2(7/2) emission of Yb3+ (about 960-1040 nm) is achieved upon the excitation of D-5(4) energy level of Tb3+ at 481 nm. Yb3+ concentration dependent quantum efficiency is calculated and the maximum efficiency approaches 152.5%. Because the energy of Yb3+ transition (about 960-1040 nm) is matched well with the band gap of crystalline Si, the phosphors could be applied potentially in silicon-based solar cells.
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页数：4
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