Electrochemical Synthesis and Fast Electrochromics of Poly(3,4-ethylenedioxythiophene) Nanotubes in Flexible Substrate

Abstract

We describe a new electrochemical synthetic method and characterization of poly(3,4-ethylenedioxythiophene) (PEDOT) nanotubes in a polycarbonate membrane. The very thin nanotubular structures in the highly flexible template provide fast electrochromic response (20 ms for oxidation or decoloration) even in a rolled state.

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

“…Furthermore, the amplitude of the transmission modulation also decreases for PEDOT-Vio (1.2)-IL gel-PB device upon repetitive cycling, which suggests poor endurance to cycling. The switching times are larger than previously reported values for PEDOT based films [20,38] and devices. [39,40] The high sheet resistance of the underlying conducting substrate (< 350 W sq À1 ), the interfacial resistance of the PEDOT/electrolyte, or PB/electrolyte interface are possible reasons for slow kinetics.…”

“…The films deposited at +1.2 and +1.8 V are referred to as PEDOT-Vio (1.2) and PEDOTVio (1.8), respectively. The motivation for growing films at high potentials stemmed from previous work by Lee et al [19][20][21] in which nanotubular PEDOT was formed at high oxidation potentials. In addition, flexible electrochromic devices were also fabricated by employing viologen-doped PEDOT and Prussian blue (PB) deposited over conducting plastic substrates, as the coloring layers and an ionic liquid (IL)-based gel film as the electrolyte.…”

Single Conducting‐Polymer Nanowires

“…PPV and PEDOT nanowires of a few hundred nanometers have been prepared by CVD and electrochemical methods, respectively, using PC templates [55,58]. In addition, block copolymer has also been used as a nanoporous template for the growth of CPNWs.…”

Synthesis of poly(3, 4 ethylenedioxythiophene) nano structure using reverse microemulsion polymerization

“…PEDOT has been widely used in molecular electronic applications [5,6]. One of the important issues in electronic devices is the poor charge-transport rate due to slow diffusion of counter ions into/out of the conductive polymer film during redox processes [7,8]. Nanostructured materials can provide high surface area and porosity which leads to higher charge/discharge capacity and short diffusion distance for ion transport [9][10][11].…”