A flexible quasi-solid-state electrochromic
device (ECD), assembled with a polymeric crystal composite electrolyte and
tungsten oxide/nickel oxide (WO3/NiO) complementary system, is demonstrated in
this study. The polymer composite, which is composed of a UV-cured ethoxylated
trimethylolpropane triacrylate (ETPTA), propylene carbonate (PC) and ferrocene
(Fc), is used as the electrolyte in the flexible quasi-solid-state ECD. The
optimal composition ration of this composite is at the weight ratio of 15/85
for ETPTA/PC with 1 M LiClO4. For the cathodic electrochromic electrode, a
flexible polyethylene terephthalate (PET) is used as the substrate, and indium-tin-
oxide (ITO) and WO3 are deposited sequentially on the PET by sputtering. A
NiO/ITO/PET electrode prepared by sputtering is used as the anodic coloring
electrode. The thickness of ITO, WO3 and NiO film is 110, 70 and 60 nm,
respectively. This flexible all-solid-state ECD fabricated with the polymeric
crystal composite electrolyte shows an optical contrast of ca. 37.5% at 550 nm.
The optical transmittance of the ECD at 550 nm can be reversibly modulated from
47.5% (bleached) to 10.0% (darkened), by applying potentials of 2.5 and 2.5 V,
Cite this paper
Wang, J. , Wang, M. and Jan, D. (2015) A Flexible Quasi-Solid-State Electrochromic Device with Polymeric Electrolyte and WO3/NiO Complementary System. Journal of Materials Science and Chemical Engineering
, 136-141. doi: 10.4236/msce.2015.37018
 Deb, S.K. (1969) A Novel Electrophotographic System. Applied Optics, 8, 192-195.
 Niklasson, G.A. and Granqvist, C.G. (2007) Electrochromics for Smart Windows: Thin Films of Tungsten Oxide and Nickel Oxide, and Devices Based on These. Journal of Materials Chemistry, 17, 127-156.
 Baetens, R., Jelle, B.P. and Gustavsen, A. (2010) Properties, Requirements and Possibilities of Smart Windows for Dynamic Daylight and Solar Energy Control in Buildings: A State-of-the-Art Review. Solar Energy Materials and Solar Cells, 94, 87-105. http://dx.doi.org/10.1016/j.solmat.2009.08.021
 Heuer, H.W., Wehrmann, R. and Kirchmeyer, S. (2002) Electrochromic Window Based on Conducting Poly (3,4-ethy- lenedioxythio-phene)poly(styrene sulfonate). Advanced Functional Materials, 12, 89-94.
 Andersson, P., Nilsson, D. and Svensson, P.O. (2002) Active Matrix Displays Based on All-Organic Electrochemical Smart Pixels Printed on Paper. Ad-vanced Materials, 14, 1460-1464.
 Kobayashi, N., Miura, S. and Nishimura, M. (2008) Organic Electrochromism for a New Color Electronic Paper. Solar Energy Materials and Solar Cells, 92, 136-139. http://dx.doi.org/10.1016/j.solmat.2007.02.027
 Mihelcic, M., Jerman, I. and Svegl, F. (2012) Elec-trochromic Ni1?xO Pigment Coatings and Plastic Film-Based Ni1?xO/TiO2 Device with Transmissive Light Modulation. Solar Energy Materials and Solar Cells, 108, 175-187.