Abstract
The tungsten oxide
$({WO}_{1-x})$
was deposited by cyclic voltammery on indium tin oxide (ITO)/polyethylene
terephthalate (PET) substrate in different deposition cycles. The different
deposition cycles were analyzed for energy dispersive spectrum (EDS), optical
characteristic, surface morphology, life time, cyclic voltammery, and electrochemical
impedance spectroscopy (EIS). The optical characteristic was measured for
transmittance variation and coloration efficiency, the surface morphologies
were measured for the
${WO}_{1-{x}}$
thin-film thickness and roughness, and EIS was measured for the
transfer impedance. The electrochromic behaviors of the
${WO}_{1-x}$
thin film were performed
in a 0.1 M lithium perchlorate/propylene carbonate
$({LiClO}_{4}/{PC})$
electrolyte.
When the deposition cycles were 50 cycles, the
${WO}_{1-x}$
thin film had the highest
transmittance variation
$(\Delta{\rm
T}_{650\ {\rm nm}}=79.54\%)$
, the thickness was 318.26 nm,
the transfer impedance was 70.51
$\Omega$
, and the thin film can cycle for 124 times.
© 2014 IEEE
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