Electrochromic devices based on soluble and processable dioxythiophene polymers

2003-10-01
Çırpan, Ali
ARGUN, Avni A.
GRENIER, Christophe R. G.
REEVES, Benjamin D.
REYNOLDS, John R.
Reflective and absorptive/transmissive polymer electrochromic devices (ECDs) composed of spray-coated films of poly(3,3-bis(octadecyloxymethyl)-3,4-dihydro-2H-thieno[3,4-b][1,4] dioxepine)(PProDOT(CH2OC18H37)(2)) and poly(3,3-bis(2-ethylhexyloxymethyl)-3,4-dihydro-2H-thieno[3,4-b][1,4] dioxepine) (PProDOT(CH(2)OEtHx)(2)) layers as cathodically coloring polymers and poly(3,6-bis(2,3-dihydrothieno[3,4-b][1,4] dioxin-5-yl)-9-methyl-9H-carbazole) (PBEDOT-NMeCz) as the anodically coloring polymer have been constructed and evaluated. These devices exhibit low switching voltages (+/-1.2 V), high visible contrast values, sub-second switching times, and high switching stability in atmospheric conditions. The reflective ECD comprising PProDOT(CH(2)OEtHx)(2) as the active layer demonstrates an unusual electrochromic behavior. By regulating the applied voltage, a high reflectance contrast of greater than 70% DeltaT was achieved in the NIR region (2 mum) without any noticeable color change of the device.

Citation Formats
A. Çırpan, A. A. ARGUN, C. R. G. GRENIER, B. D. REEVES, and J. R. REYNOLDS, “Electrochromic devices based on soluble and processable dioxythiophene polymers,” Journal of Materials Chemistry, vol. 13, no. 10, pp. 2422–2428, 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/33239.