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Electrochemical and Spectroelectrochemical Properties of a New Donor–Acceptor Polymer Containing 3,4-Dialkoxythiophene and 2,1,3-Benzothiadiazole Units

Milano-Bicocca Solar Energy Research Center—MIB-Solar, Department of Materials Science, University of Milano Bicocca, Via Cozzi 53, Milano I-20125, Italy
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Polymers 2013, 5(3), 1068-1080; https://doi.org/10.3390/polym5031068
Received: 30 May 2013 / Revised: 23 July 2013 / Accepted: 5 August 2013 / Published: 12 August 2013
(This article belongs to the Special Issue Semiconducting Polymers for Organic Electronic Devices)
A new heteroarylene-vinylene donor-acceptor low bandgap polymer, the poly(DEHT-V-BTD), containing vinylene-spaced efficient donor (dialkoxythiophene) and acceptor (benzothiadiazole) moieties, is presented. Electropolymerization has been carried out by several electrochemical techniques and the results are compared. In particular, the pulsed potentiostatic method was able to provide layers with sufficient amounts of material. Cyclic voltammetries showed reversible behavior towards both p- and n-doping. The HOMO, LUMO, and bandgap energies were estimated to be −5.3, −3.6 and 1.8 eV, respectively. In situ UV-Vis measurements have established that the presence of the vinylene group stabilizes the formation of polaronic charge carriers even at high doping levels. View Full-Text
Keywords: donor–acceptor–donor monomer; conducting polymer; electropolymerization; electrochemistry; 3,4-bis(2-ethylhexyloxy)thiophene; 2,1,3-benzothiadiazole donor–acceptor–donor monomer; conducting polymer; electropolymerization; electrochemistry; 3,4-bis(2-ethylhexyloxy)thiophene; 2,1,3-benzothiadiazole
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Calderon, E.H.; Dangate, M.; Manfredi, N.; Abbotto, A.; Salamone, M.M.; Ruffo, R.; Mari, C.M. Electrochemical and Spectroelectrochemical Properties of a New Donor–Acceptor Polymer Containing 3,4-Dialkoxythiophene and 2,1,3-Benzothiadiazole Units. Polymers 2013, 5, 1068-1080.

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