Eu 掺杂 TiO2 纳米点的增强发光。

Enhanced Luminescence of Eu-Doped TiO2Nanodots.

机构信息

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

出版信息

Nanoscale Res Lett. 2009 Apr 25;4(8):809-13. doi: 10.1007/s11671-009-9319-5.

DOI:10.1007/s11671-009-9319-5

PMID:20596343

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2894177/

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.

摘要

通过相分离诱导自组装，在基底上制备了单分散且球形的 Eu 掺杂 TiO2纳米点。通过改变制备条件，纳米点的平均直径可以分别达到 50nm 和 70nm。煅烧后的纳米点由非晶态 TiO2 基质组成，其中 Eu3+离子高度分散。由于非晶态 TiO2 基质向 Eu3+离子的有效能量转移，Eu 掺杂 TiO2 纳米点表现出强烈的发光。发光强度约为 Eu 掺杂 TiO2 薄膜的 12.5 倍，荧光寿命可达 960μs。