Luminescence enhancement in bromine and samarium co-doped TiO2 semiconductor nanocrystalline powders

被引：34

作者：

Gao, Chunmei ^{[1
,2
]}

Song, Hongwei ^{[1
,2
]}

Hu, Lanying ^{[1
,2
]}

Pan, Guohui ^{[1
,2
]}

Qin, Ruifei ^{[1
,2
]}

Wang, Fang ^{[1
,2
]}

Dai, Qilin ^{[1
,2
]}

Fan, Libo ^{[1
,2
]}

Liu, Lina ^{[1
,2
]}

Liu, Huihui ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Key Lab Excited State Phys, Changchun 130033, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Changchun 130033, Peoples R China

来源：

JOURNAL OF LUMINESCENCE | 2008年 / 128卷 / 04期

关键词：

TiO2; samarium; bromine; luminescence;

D O I：

10.1016/j.jlumin.2007.07.020

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, TiO2:Sm3+ (0.75 mol%) nanoparticles doped with different amounts of Br- were prepared by an improved sol-gel method and were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), VG ESCALAB MKIIX-ray photoelectron spectrometer (XPS) and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS). Their photoluminescence (PL) properties were investigated at room temperature. The emissions of (4)G(5/2)-H-6(J) (J = 5/2, 7/2, 9/2) transitions of SM3+ ions were observed under the excitation wavelength at 350 nm and the emission intensity depended strongly on the doping amount of Br-. TiO2: SM3+ (0.75 mol%) nanoparticles doped with I mol% of Br- calcined at 700 degrees C exhibit highest intensity of luminescence, which is nearly three times than the undoped one. The mechanism of photoluminescence in the co-doped system was discussed. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：559 / 564

页数：6

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