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PEDOT/WO 3 Hybrid Nanofiber Architectures for High Performance Electrochromic Devices
Author(s) -
Dulgerbaki Cigdem,
Nohut Maslakci Neslihan,
Komur Ali Ihsan,
Uygun Oksuz Aysegul
Publication year - 2016
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201501154
Subject(s) - electrochromism , materials science , pedot:pss , nanofiber , ionic liquid , electrochromic devices , nanoporous , hexafluorophosphate , electrospinning , chemical engineering , poly(3,4 ethylenedioxythiophene) , scanning electron microscope , tungsten trioxide , nanotechnology , layer (electronics) , organic chemistry , tungsten , polymer , electrode , composite material , chemistry , engineering , metallurgy , catalysis
Abstract This study focuses on the electrochromic device (ECD) applications of poly(3,4‐ethylenedioxythiophene)/tungsten oxide (PEDOT/WO 3 ) hybrid nanofibers prepared via electrospinning method. Nanoporous WO 3 films were initially electrosynthesized on Pt sheet. The PEDOT layer was electropolymerized onto the entire surface of the WO 3 nanoporous host framework in the presence of different ionic liquids: 1‐butyl‐3‐methylimidazolium tetrafluoroborate (BMIMBF 4 ), 1‐butyl‐3‐methylimidazolium hexafluorophosphate (BMIMPF 6 ), 1‐butyl‐ 3‐methylimidazolium bis(trifluoromethylsulfonyl) imide (BMIMTFSI), and 1‐butyl‐1‐methylpyrrolidinium bis(trifluoromethylsulfonyl) imide (BMPTFSI). The morphological features and elemental surface characterization of hybride nanofibers were monitored by scanning electron microscopy and energy dispersive X‐ray spectroscopy. ECDs changed color reversibly from transparent to light brown by switching from +3 V to −3 V. It was found that the highest optical modulation of 47.89 % and maximum coloration efficiency of 363.72 cm 2 /C is achieved for PEDOT/WO 3 /BMIMPF 6 based electrochromic device. Hybrid nanofibers exhibited excellent long term stability even after 1000 chronoamperometric cycles. This work could not only push forward the facile preparation of PEDOT/WO 3 nanofibers but also represent, for the first time, the possibility that the hybrid nanofibers could be a promising material for the highly efficient ECDs.