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7749508 
Journal Article 
Solid-state electrochromic device based on two poly(thiophene) derivatives 
Ribeiro, AS; Machado, DA; Filho, PFD; De Paoli, MA 
2004 
1 
Journal of Electroanalytical Chemistry
ISSN: 1572-6657
EISSN: 1873-2569 
Elsevier 
LAUSANNE 
567 
2 
243-248 
English 
WOS:000221704700011 
A solid-state electrochromic device was assembled using a polymer electrolyte and optically transparent electrodes modified with thin films of poly{3-[12-(p-methoxyphenoxy)dodecyl]thiophene} and poly(3,4- ethylenedioxythiophene) doped with poly(styrenesulfonate). Poly(epichlorohydrin- co-ethylene oxide) containing LiClO4 was used as the polymer electrolyte. After assembling, the device was studied by spectroelectrochemical techniques. The best performance of this device could be obtained by adjusting the relative thickness of the active polymer films and the potential range of operation of the device. The device shows color variation during ca. 500 charge/discharge cycles and can be constructed under atmospheric conditions. The results obtained suggest a multitude of perspectives in applications in electrochromic displays. © 2004 Elsevier B.V. All rights reserved. 
substituted polythiophenes; electrochromic device; spectroelectrochemistry; polymer electrolyte