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Influence of side c...
Influence of side chains on electrochromic properties of green donor-acceptor-donor polymers
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- Hellström, Stefan, 1978 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers
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- Cai, Tianqi (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,East China University of Science and Technology,Chalmers
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- Inganäs, Olle (författare)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska högskolan
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- Andersson, Mats, 1966 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers
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(creator_code:org_t)
- Elsevier BV, 2011
- 2011
- Engelska.
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Ingår i: Electrochimica Acta. - : Elsevier BV. - 0013-4686. ; 56:10, s. 3454-3459
- Relaterad länk:
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http://dx.doi.org/10...
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https://research.cha...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Three solution processable cathodically coloring green electrochromic polymers, based on 2,3-diphenyl-5,7-di(thiophen-2-yl)thieno[3,4-b]pyrazine, have been synthesized by oxidative FeCl3 polymerization. The polymers were designed with solubilizing alkyl and oligoethylene oxide side chains to achieve solubility and processability. All three polymers have a small electrochemical bandgap (1.8-1.9 eV) and low oxidation potentials. Spectroelectrochemical studies of polymer films on ITO reveal that the alkyl side chains in head-to-head position on the polymer backbone promote a defined high-energy absorption peak and suppress tailing of charge-carrier absorption into the visible region. Kinetic studies, based on transmission measurements applying a square-wave potential between reduced and oxidized states, show that the polymer with exclusively oligoethylene oxide side chains (P3) had the fastest response times, monitored at the low-energy absorption maxima. The best performing polymer (P1) showed a good optical contrast in the visible region with a Delta T of 26% at 700 nm. An initial test of the electrochemical stability showed that the oligoethylene oxide containing polymers had superior stability over 500 full switches.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- Spectroelectrochemistry
- processable green
- solar-cells
- Conjugated polymer
- Electrochromism
- FeCl3-polymerization
- polymerization
- oxidized state
- distributions
- design
- maldi-ms
- neutral state
- copolymers
- realization
- MALDI-TOF
- TECHNOLOGY
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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