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PEDOT Film (pedot + film)

Distribution by Scientific Domains
Chemistry75%

Selected Abstracts

Poly(3,4-ethylenedioxythiophene) (PEDOT)-Coated MWCNTs Tethered to Conducting Substrates: Facile Electrochemistry and Enhanced Coloring Efficiency

MACROMOLECULAR RAPID COMMUNICATIONS, Issue 24 2008
Shweta Bhandari
Abstract Composite films of poly(3,4-ethylenedioxythiophene) (PEDOT)-coated over functionalized multiwalled coiled and linear carbon nanotubes (CNTs) have been fabricated by a simple oxidative electropolymerization route. The nanotubular morphology of the polymer,CNT composite is responsible for the lower charge transfer impedance, lower internal resistance, and superior capacitive response in comparison to that shown by the control PEDOT film doped by trifluoromethanesulfonate ions. This facile electrochemistry exhibited by the PEDOT,CNT composite film ensues in a remarkably high coloration efficiency of 367 cm2,·,C,1 at 550 nm, hitherto unrealized for PEDOT; thus demonstrating the huge potential the PEDOT,CNT composite film has as cathode for the entire spectrum of electrochromic devices. [source]

A Dual Electrochrome of Poly-(3,4-Ethylenedioxythiophene) Doped by N,N,-Bis(3-sulfonatopropyl)-4-4,-bipyridinium,Redox Chemistry and Electrochromism in Flexible Devices

CHEMSUSCHEM CHEMISTRY AND SUSTAINABILITY, ENERGY & MATERIALS, Issue 1 2010
Shweta Bhandari
Abstract An electrochromic zwitterionic viologen, N,N,-bis(3-sulfonatopropyl)-4-4,-bipyridinium, has been used for the first time for doping poly (3,4-ethylenedioxythiopene) (PEDOT) films during electropolymerization. Slow and fast diffusional rates for the monomer at deposition potentials of +1.2 and +1.8,V, respectively yielded the viologen-doped PEDOT films with granular morphology and with dendrite-like shapes. The dual electrochrome formed at +1.8,V, showed enhanced coloration efficiency, larger electrochemical charge storage capacity, and superior redox activity in comparison to its analogue grown at +1.2,V, thus demonstrating the role of dendritic shapes in amplifying electrochromism. Flexible electrochromic devices fabricated with the viologen-doped PEDOT film grown at +1.8,V and Prussian blue with an ionic liquid-based gel electrolyte film showed reversible coloration between pale and dark purple with maximum coloration efficiency of 187,cm2,C,1 at ,=693,nm. The diffusional impedance parameters and switching kinetics of the device showed the suitability of this dual electrochrome formed as a single layer for practical electrochromic cells. [source]

Studies on Charging Processes and Capacitances of Oxidized Polyethylenedioxythiophene Films

CHINESE JOURNAL OF CHEMISTRY, Issue 7 2005
She Ping-Ping
Abstract In this paper, the chronoamperometry was used to study the charging processes of polyethylenedioxythiophene (PEDOT) modified electrodes in the potential range where PEDOT was in the oxidized state. The results show that the charging behaviors of the PEDOT films are well agreed with the exhausted finite diffusion model. The dependence of the capacitance values of the films on potential and concentration of solution was also studied in this potential range. [source]