Very low band gap thiadiazoloquinoxaline donor-acceptor polymers as multi-tool conjugated polymers
Date
2014
Authors
Steckler, T.T.
Henriksson, P.
Mollinger, S.
Lundin, A.
Salleo, A.
Andersson, M.R.
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Journal article
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Journal of the American Chemical Society, 2014; 136(4):1190-1193
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Abstract
Here we report on the synthesis of two novel very low band gap (VLG) donor–acceptor polymers (Eg ≤ 1 eV) and an oligomer based on the thiadiazoloquinoxaline acceptor. Both polymers demonstrate decent ambipolar mobilities, with P1 showing the best performance of ∼10–2 cm2 V–1 s–1 for p- and n-type operation. These polymers are among the lowest band gap polymers (≲0.7 eV) reported, with a neutral λmax = 1476 nm (P2), which is the farthest red-shifted λmax reported to date for a soluble processable polymer. Very little has been done to characterize the electrochromic aspects of VLG polymers; interestingly, these polymers actually show a bleaching of their neutral absorptions in the near-infrared region and have an electrochromic contrast up to 30% at a switching speed of 3 s.
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Data source: Supporting information, http://pubs.acs.org/doi/suppl/10.1021/ja410527n
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Copyright 2013 American Chemical Society