Raman spectroscopic studies of gasochromic a-WO3 thin films

被引：106

作者：

Lee, SH ^{[1
]}

Cheong, HM

Liu, P

Smith, D

Tracy, CE

Mascarenhas, A

Pitts, JR

Deb, SK

机构：

[1] Natl Renewable Energy Lab, Golden, CO 80401 USA

[2] Sogang Univ, Dept Phys, Seoul 121742, South Korea

[3] DCH Technol Inc, Valencia 91355, Spain

来源：

ELECTROCHIMICA ACTA | 2001年 / 46卷 / 13-14期

基金：

新加坡国家研究基金会;

关键词：

gasochromic; tungsten oxide; Raman; heavy oxygen;

D O I：

10.1016/S0013-4686(01)00379-6

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The gasochromic mechanism in amorphous tungsten oxide films has been investigated using Raman scattering measurements and optical cycling tests. The Raman spectra of as-deposited films show two strong peaks at 770 and 950 cm(-1) due to vibrations of the O-W6+-O and W6+=O bonds, respectively. When the Pd/a-WO3 films are gasochromically colored by exposure to diluted hydrogen gas, extra Raman peaks due to O-W5+-O and W5+=O bonds appear at 330 and 450 cm(-1), respectively. Optical cycling tests confirm that the Pd/a-WO3, films can not be bleached without oxygen. The Raman spectra of a-WO3 films bleached with isotopic heavy oxygen (O-18) show that the gasochromic coloration in a-WO3 films is directly related to the double injection of hydrogen ions and electrons. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1995 / 1999

页数：5

共 12 条

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