Surface modification of grains with silver nano-clusters: a new route to great enhancement of photoluminescence in Eu3+-doped ferroelectric polycrystalline oxide thin films

被引：9

作者：

Su, Li ^{[1
]}

Qin, Ni ^{[1
]}

Sa, Tongliang ^{[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：

OPTICS EXPRESS | 2013年 / 21卷 / 24期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

ENERGY-TRANSFER; AG PARTICLES; LUMINESCENCE; EU3+; EMISSION; NANOPARTICLES; FLUORESCENCE; FABRICATION; GLASSES; IONS;

D O I：

10.1364/OE.21.029425

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on a new route to greatly enhance the photoluminescence of Eu3+ doped ferroelectric polycrystalline oxide thin films: surface modification of grains with silver nanoclusters (NCs). The Ag doped Bi3.6Eu0.4Ti3O12 (BET) thin films were prepared by a chemical solution deposition method. According to the XRD, TEM and XPS analysis, partially oxidated Ag NCs have been formed on the surfaces of the BET grains. A greatly enhanced photoluminescence was obtained in a wide range of Ag doping level. Role of the Ag NCs in the photoluminescence enhancement was investigated by means of absorption, emission and excitation spectra, as well as decay lifetime measurement. The results indicate that the intra-4f transition of Eu3+ can be intensively activated by the coupling of the charge transfer band of BET with the D-5(0) state of Eu3+ ions, and the enhancement of Eu3+ ions emission in the present thin films was attributed to the surface modification of BET crystalline grains by Ag NCs. In addition, the influences of Ag NCs on the dielectric and ferroelectric properties of these materials were discussed as well. (C)2013 Optical Society of America

引用

页码：29425 / 29434

页数：10