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Enhanced Luminescence of Eu-Doped TiO2Nanodots

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Author(s): Luo Ming | Cheng Kui | Weng Wenjian | Song Chenlu | Du Piyi | Shen Ge | Xu Gang | Han Gaorong

Journal: Nanoscale Research Letters
ISSN 1931-7573

Volume: 4;
Issue: 8;
Start page: 809;
Date: 2009;
Original page

Keywords: TiO2 | Eu3+ | Nanodots | Phase-separation-induced self-assembly | Luminescence

ABSTRACT
Abstract Monodisperse and spherical Eu-doped TiO2nanodots were prepared on substrate by phase-separation-induced self-assembly. The average diameters of the nanodots can be 50 and 70 nm by changing the preparation condition. The calcined nanodots consist of an amorphous TiO2matrix with Eu3+ions highly dispersed in it. The Eu-doped TiO2nanodots exhibit intense luminescence due to effective energy transfer from amorphous TiO2matrix to Eu3+ions. The luminescence intensity is about 12.5 times of that of Eu-doped TiO2film and the luminescence lifetime can be as long as 960 μs.
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