Defect-mediated photoluminescence dynamics of Eu3+-doped TiO2 nanocrystals revealed at the single-particle or single-aggregate level

被引：80

作者：

Tachikawa, Takashi ^{[1
]}

Ishigaki, Takamasa ^{[2
]}

Li, Ji-Guang ^{[2
]}

Fujitsuka, Mamoru ^{[1
]}

Majima, Tetsuro ^{[1
]}

机构：

[1] Osaka Univ, Inst Sci & Ind Res SANKEN, Osaka 5670047, Japan

[2] Natl Inst Mat Sci, Nano Ceram Ctr, Tsukuba, Ibaraki 3050044, Japan

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2008年 / 47卷 / 29期

关键词：

fluorescence spectroscopy; lanthanides; nanostructures; photochemistry; single-nanoparticle studies;

D O I：

10.1002/anie.200800528

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

(Figure Presented) Single-particle fluorescence spectroscopy was used to investigate defect-mediated photoluminescence (PL) dynamics of undoped and Eu3+-doped TiO2 nanoparticles, and revealed that free excitons in the photoirradiated TiO2 host can excite both interior and surface Eu3+ ions, while trapped excitons at the surface only excite the latter. The picture shows PL images of TiO2:Eu 3+ nanoparticles during laser excitation in air and argon atmospheres. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.

引用

页码：5348 / 5352

页数：5

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