Effects of oxygen addition to the electrochromic properties of WO3-z thin films sputtered on flexible PET/ITO substrates

被引：44

作者：

Lin, Yung-Sen ^{[1
]}

Chiang, Yue-Liang ^{[1
]}

Lai, Jhen-Yi ^{[1
]}

机构：

[1] Feng Chia Univ, Dept Chem Engn, Taichung 407, Taiwan

来源：

SOLID STATE IONICS | 2009年 / 180卷 / 01期

关键词：

Sputtering; Flexible substrate; Electrochromism; Tungsten oxide; Cyclic voltammetry; DEVICES; DEPOSITION; TUNGSTEN;

D O I：

10.1016/j.ssi.2008.10.009

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：

An investigation was conducted on electrochromic properties of WO3-z (tungsten oxide) thin films sputtered on 60 Omega/square flexible PET (polyethylene terephthalate)/ITO (indium tin oxide) substrates at various oxygen flow rates. A metallic W target, sputtered by radio frequency (r.f.) power with argon gases and reacted with oxygen gases at room temperature (23 degrees C). was proven to provide extraordinary electrochromic properties. Cyclic voltammetry measurement demonstrated that only low driving voltages from -1 V to 1 V were needed to provide Li+ ion insertion and extraction to and from a working electrode. The flexible PET/ITO/WO3-z film was mounted on the working electrode and dipped in a 0.1 M LiClO4-PC (propylene carbonate) electrolyte. The electrochromic properties of flexible PET/ITO/WO3-z were investigated by cyclic potentiostatic switching and ultraviolet (UV)-visible spectroscopy. An oxygen flow rate of 0.71 sccm with a low O/W-ratio of 2.916, an oxygen deficiency z of 0.084 and an insertion coefficient x of 0.150 can offer an excellent light modulation of up to 73.1% of transmittance variation, optical density change of 0.89 and color efficiency of 62.4 cm(2)/C at a wavelength of 650 nm in 14 s of Li+ insertion and extraction. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.

引用

页码：99 / 105

页数：7

共 24 条

[1] Flexible foils with electrochromic coatings:: science, technology and applications [J].

Azens, A ;

Avendaño, E ;

Backholm, J ;

Berggren, L ;

Gustavsson, G ;

Karmhag, R ;

Niklasson, GA ;

Roos, A ;

Granqvist, CG .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2005, 119 (03) :214-223

[2] Electrochromic devices on polyester foil [J].

Azens, A ;

Gustavsson, G ;

Karmhag, R ;

Granqvist, CG .

SOLID STATE IONICS, 2003, 165 (1-4) :1-5

[3] Sol-gel deposition of electrochromic WO3 thin film on flexible ITO/PET substrate [J].

Bessière, A ;

Badot, JC ;

Certiat, MC ;

Livage, J ;

Lucas, V ;

Baffier, N .

ELECTROCHIMICA ACTA, 2001, 46 (13-14) :2251-2256

[4] Roll-to-roll pulsed dc magnetron sputtering deposition of WO3 for electrochromic windows [J].

Brigouleix, C ;

Topart, P ;

Bruneton, E ;

Sabary, F ;

Nouhaut, G ;

Campet, G .

ELECTROCHIMICA ACTA, 2001, 46 (13-14) :1931-1936

[5] All polymeric solid state electrochromic devices [J].

De Paoli, MA ;

Casalbore-Miceli, G ;

Girotto, EM ;

Gazotti, WA .

ELECTROCHIMICA ACTA, 1999, 44 (18) :2983-2991

[6] OPTICAL AND PHOTOELECTRIC PROPERTIES AND COLOR CENTERS IN THIN-FILMS OF TUNGSTEN OXIDE [J].

DEB, SK .

PHILOSOPHICAL MAGAZINE, 1973, 27 (04) :801-822

[7]

FAUGHNAN BW, 1975, RCA REV, V36, P177

[8]

Gazotti WA, 1998, ADV MATER, V10, P1522, DOI 10.1002/(SICI)1521-4095(199812)10:18<1522::AID-ADMA1522>3.0.CO

[9]

2-U

[10] COLOR IN TUNGSTEN TRIOXIDE THIN-FILMS [J].

GERARD, P ;

DENEUVILLE, A ;

HOLLINGER, G ;

DUC, TM .

JOURNAL OF APPLIED PHYSICS, 1977, 48 (10) :4252-4255

← 1 2 3 →