Fe-doped and Mn-doped titanium dioxide thin films

被引：30
|
作者：
Nakaruk, A. [1 ]
Lin, C. Y. W. [1 ]
Channei, D. [1 ]
Koshy, P. [1 ]
Sorrell, C. C. [1 ]
机构：
[1] Univ New S Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia
来源：
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2012年 / 61卷 / 01期
基金：
澳大利亚研究理事会;
关键词：
Titanium dioxide; Spin coating; Fe-doping; Mn-doping; X-ray photoelectron spectroscopy; Optical indirect band gap; TIO2; NANOPARTICLES; OPTICAL-PROPERTIES; TEMPERATURE; DYNAMICS; HYDROGEN;
D O I：
10.1007/s10971-011-2607-4
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Thin films of TiO2 doped with Fe and Mn were deposited on F-doped SnO2-coated glass by spin coating. Dopant concentrations of 3-7 wt% (metal basis) were used. The structural, chemical, and optical characteristics of the films were investigated. Laser Raman microspectroscopy and glancing angle X-ray diffraction data showed that the films consisted of the anatase polymorph of TiO2. X-ray photoelectron spectroscopy data indicated the presence of Fe3+, Mn4+, and Mn3+ in the doped films, as predicted by calculated thermodynamic stability diagrams, and the occurrence of atomic disorder and associated structural distortion. Ultraviolet-visible spectrophotometry data showed that the optical indirect band gap of the films decreased significantly with increasing dopant levels, from 3.36 eV (undoped) to 2.95 eV (7 wt% Fe) and 2.90 eV (7 wt% Mn). These improvements are attributed to single (Fe) or multiple (Mn) shallow electron/hole trapping sites associated with the dopant ions.
引用
收藏
页码：175 / 178
页数：4
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