Open AccessA New and Simple Method for Manufacturing Electrochromic Tungsten Oxide Films
Author(s) -
N. G. Park,
B. W. Kim,
A. Poquet,
G. Campet,
J. Portier,
JinHo Choy,
YoungIl Kim
Publication year - 1997
Publication title -
active and passive electronic components
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.144
H-Index - 22
eISSN - 1026-7034
pISSN - 0882-7516
DOI - 10.1155/1998/43025
Subject(s) - electrochromism , materials science , nanoporous , tungsten , anodizing , amorphous solid , tungsten trioxide , indium tin oxide , oxide , layer (electronics) , anode , electrochromic devices , electrochemistry , lithium (medication) , chemical engineering , tin oxide , nanotechnology , composite material , metallurgy , electrode , chemistry , medicine , aluminium , organic chemistry , endocrinology , engineering
A new and simple method for the preparation of electrochromic tungsten oxide film ispresented. This novel approach can be realized by introducing a nanoporous texturedpolyacrylic acid (PAA) layer between tungsten oxide layer and indium tin oxide (ITO)one by dip-coating process. Homogeneous film with a thickness of about 0.8 μm is madeby single dipping a PAA-coated ITO glass in the WO3-NH4OH solution and shows anX-ray amorphous structure. During the cathodic and anodic processes by chronopotentiometry,the present films exhibit highly reversible electrochemical insertion oflithium ions; the corresponding inserted charge of 12.5 mC/cm2 gives rise to a markedblue color yielding the change in optical density (AOD) of 0.65 at 550 nm and acoloration efficiency (η) of 51.8 cm2/C
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