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Experimental and Theoretical Investigations of an Electrochromic Azobenzene and 3,4‐Ethylenedioxythiophene‐based Electrochemically Formed Polymeric Semiconductor
Author(s) -
Gicevicius Mindaugas,
Bagdziunas Gintautas,
Abduloglu Yasin,
Ramanaviciene Almira,
Gumusay Ogun,
Ak Metin,
Soganci Tugba,
Ramanavicius Arunas
Publication year - 2018
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201800478
Subject(s) - electrochromism , azobenzene , poly(3,4 ethylenedioxythiophene) , semiconductor , materials science , organic semiconductor , conductive polymer , nanotechnology , chemistry , optoelectronics , chemical engineering , polymer , electrode , composite material , engineering
An electrochromic material based on azobenzene and 3,4‐ethylenedioxythiophene (EDOT) semiconducting layer was electrochemically deposited on an indium tin oxide coated glass electrode. Chemical synthesis of the azobenzene and EDOT‐based chromophore (DAE) and electrochemical formation of its corresponding polymer (pDAE) are reported. The electrochromic properties of the synthesized polymer pDAE were investigated by electrochemical and spectroelectrochemical methods. pDAE exhibited an optical bandgap of 1.82 eV and three distinct colored states in its reduced, neutral, and oxidized forms. The pDAE polymer showed 44 % optical contrast at 710 nm between its reduced and oxidized states and a fast electrochromic switching time of 1.0 s. The frontier molecular orbitals, Raman shifts, and semiconducting properties of this electrochromic polymer were evaluated by density functional theory calculations. The optical absorption bands of the polymer charged states were assigned and investigated.