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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