Bright up-conversion green photoluminescence in Ho3+-Yb3+ co-doped Bi4Ti3O12 ferroelectric thin films

被引：64
作者：
Ding, Gangjin [1 ]
Gao, Feng [1 ]
Wu, Guangheng [1 ]
Bao, Dinghua [1 ]
机构：
[1] Sun Yat Sen Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2011年 / 109卷 / 12期
基金：
高等学校博士学科点专项科研基金;
关键词：
BISMUTH TITANATE; RED; EMISSION; GLASSES; MATRIX; YB3+; POLARIZATION; LUMINESCENCE; SPECTROSCOPY; IONS;
D O I：
10.1063/1.3596597
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Ho3+-Yb3+ co-doped bismuth titanate ferroelectric thin films were prepared by a chemical solution deposition method on fused silica substrates and their up-conversion luminescence characteristics excited by a 980 nm diode laser were investigated. The two emission bands centered at 546 and 656 nm in the emission spectra can be assigned to F-5(4) + S-5(2) -> I-5(8) and F-5(5) -> I-5(8) transitions of Ho3+ ions, respectively. A bright green emission was observed even when the laser pumping power was relatively low. The dependence of the emission intensity on the pumping power indicated that the up-conversion emission in the thin films was a two-photon process. The up-conversion emission mechanism is discussed in detail. This study suggests that Ho3+ and Yb3+ co-doped Bi4Ti3O12 thin films can be applied to the fabrication of new multifunctional photoluminescence ferroelectric thin-film devices. (C) 2011 American Institute of Physics. [doi:10.1063/1.3596597]
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页数：4
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