Mesoporous sol-gel WO3 thin films via poly(styrene-co-allyl-alcohol) copolymer templates

被引：41
|
作者：
Zayim, EO [1 ]
Liu, P
Lee, SH
Tracy, CE
Turner, JA
Pitts, JR
Deb, SK
机构：
[1] Istanbul Tech Univ, Dept Phys, Fac Sci & Letters, TR-80626 Istanbul, Turkey
[2] Natl Renewable Energy Lab, Golden, CO 80401 USA
来源：
SOLID STATE IONICS | 2003年 / 165卷 / 1-4期
关键词：
mesoporous tungsten oxide; sol-gel processing; electrochromism; ultraviolet illumination; insertion kinetics;
D O I：
10.1016/j.ssi.2003.08.014
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this study a copolymer poly(styrene-co-allyl-alcohol), [-CH2CH(C6H5)-](x)[-CH2CH-(CH2OH)-](y) has been employed as a novel template in a sol-gel synthesis process to direct the formation of mesoporous tungsten oxide. The copolymer, due to its rigid hydrophobic block of polystyrene, is a more effective surfactant in an alcohol solution than polypropylene oxide-polyethylene oxide based compounds. The films have been prepared by a spin-coating technique from an ethanol solution of tungsten hexachloride. A room temperature, ultraviolet illumination method has been found to be very suitable for removing the polymer template, leading to the formation of a high-quality mesoporous structure. The electrochromic and optical properties of the mesoporous films are described and compared to standard sol-gel tungsten oxide films. Mesoporous materials exhibit superior high-rate ion-insertion performance when used as electrochromic layers. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：65 / 72
页数：8
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