Advanced Functional Materials · 2013 · 123 citations · 30 references
Natural SciencesMaterials EngineeringMaterials ScienceElectrochemistryOptical MaterialsPolymer ChemistryConducting PolymersConductive PolymersElectrochromic MaterialsElectrode MaterialsOptoelectronic MaterialsPolymer Thin FilmsContrastElectrochromic DevicesElectrochromic Thin FilmsOptical ContrastPoly(3, 4-Ethylenedioxythiophene)Polyethylene TerephthalateResponse TimeTin Oxide Electrochromics
Indium‐doped tin oxide free electrochromic devices are prepared by coating electrochromic polymers onto polyethylene terephthalate substrates encompassing two different silver grids as electrodes. One design comprises a flexoprinted highly conductive silver grid electrode, yielding electrochromic devices with a response time of 2 s for an optical contrast of 27%. The other design utilizes an embedded silver grid electrode whereupon response times of 0.5 s for a 30% optical contrast are realized when oxidizing the device. A commercially available conductive poly(3,4‐ethylenedioxythiophene):poly(4‐styrenesulfonate acid) formulation (PEDOT:PSS) is coated onto the silver grids as a charge balancing polymer, and is in this setting found to be superior to a polypyrrole previously employed in electrochromic devices. In addition, the PEDOT:PSS layer increases the conductivity in the hexagonal grid structure.
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Poly(3,4-ethylenedioxythiophene) and Its Derivatives: Past, Present, and Future
L. Groenendaal, F. Jonas, D. Freitag et al. · Advanced Materials · 2000 · 3.3K citations