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High‐performance Flexible Complementary Electrochromic Device Based on Plasma Modified WO 3 Nano Hybrids and V 2 O 5 Nanofilm with Low Operation Voltages
Author(s) -
Eren Esin,
Alver Ceyda,
Karaca Gozde Yurdabak,
Uygun Emre,
Oksuz Lutfi,
Oksuz Aysegul Uygun
Publication year - 2018
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.201800276
Subject(s) - electrochromism , materials science , pedot:pss , tungsten trioxide , electrochromic devices , dielectric spectroscopy , electrode , optoelectronics , indium tin oxide , thin film , nanotechnology , analytical chemistry (journal) , tungsten , electrochemistry , layer (electronics) , organic chemistry , chemistry , metallurgy
Tungsten trioxide‐poly(3,4‐ethylenedioxythiophene) (WO 3 ‐PEDOT) and tungsten trioxide‐polyfuran (WO 3 ‐PFu) were prepared by rf rotating plasma polymerization. Electrochromic hybrid thin films were fabricated onto flexible polyethylene terephthalate (PET)/ indium tin oxide (ITO) film using electron beam evaporation method. In order to deeply characterize all films, scanning electron microscopy‐energy dispersive X‐ray spectroscopy (SEM‐EDS) and electrochemical impedance spectroscopy (EIS) techniques were used. The counter electrode effect on plasma modified WO 3 nano hybrids‐based electrochromic devices (ECDs) was evaluated. By incorporating flexible vanadium pentoxide (V 2 O 5 ) film as counter electrode, complementary ECDs were constructed through combining the hybrid flexible films (WO 3 ‐PEDOT, WO 3 ‐PFu) as working electrodes, which exhibit highly efficient electrochromic performance with low voltage operation. Especially, WO 3 ‐PEDOT/V 2 O 5 ‐based ECD owns a high optical modulation of 61.5 % at 750 nm driven by −1.0 V (coloration) and +1 V (bleaching) with fast response times (coloration time: 13.58 s, bleaching time: 8.07 s) and a high coloration efficiency of 527 cm 2 C −1 . This study can supply useful and efficient avenue for designing flexible complementary electrochromic device for energy‐saving flexible electronics.