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Open Access Nano Express

Enhanced Luminescence of Eu-Doped TiO2Nanodots

Ming Luo, Kui Cheng, Wenjian Weng*, Chenlu Song, Piyi Du, Ge Shen, Gang Xu and Gaorong Han

Author affiliations

Department of Material Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, 310027, People’s Republic of China

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Citation and License

Nanoscale Research Letters 2009, 4:809-813  doi:10.1007/s11671-009-9319-5

Published: 25 April 2009

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.

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