Structural and electrochromic properties of TiO2 thin films prepared by metallorganic chemical vapor deposition

被引:30
作者
Khalifa, Z. S. [1 ,2 ]
Lin, H. [1 ]
Shah, S. Ismat [1 ,3 ]
机构
[1] Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19716 USA
[2] Beni Suef Univ, Dept Phys, Bani Suwayf 62111, Egypt
[3] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
关键词
Metallorganic Chemical Vapor Deposition; Photochromic property; Thin films; Titanium dioxide; Voltammetry; X-ray diffraction; TITANIUM-DIOXIDE; ELECTROCHEMICAL PROPERTIES; SOL; PRECURSOR; ANATASE; FABRICATION; EFFICIENCY; INSERTION;
D O I
10.1016/j.tsf.2010.04.013
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Titanium dioxide thin films were deposited by Metallorganic Chemical Vapor Deposition at substrate temperatures ranging from 250 degrees C to 450 degrees C over soda lime glass and indium tin oxide coated glass substrates. X-ray diffraction studies show that films have a crystalline anatase structure at all the deposition temperatures. Particle size decreases and texture changes with the increase in substrate temperature. X-ray photoelectron spectroscopy confirms the appearance of a new well resolved state in the core level of Ti 2p spectrum shifted by 1.16 eV to lower binding energy due to the reduction of Ti+4 to Ti+3 upon litheation. Chronoamperometery, cyclic voltammetery and in situ UV-Vis spectrophotometeric studies were carried out on the prepared samples. Particle size and crystallinity control the electrochromic performance. The 350 degrees C film shows the highest ion storage capacity and the highest optical modulation along with an appreciable band gap broadening. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:5457 / 5462
页数:6
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