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Issue 21, 2018
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Well-defined alternative polymer semiconductor using large size regioregular building blocks as monomers: electrical and electrochemical properties

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Abstract

Regioregular polymer semiconductors have demonstrated a well-ordered micro-crystalline morphology in thin films due to better π-stacking orientation resulting in efficient charge transport. We propose an effective synthetic strategy to achieve well-defined regioregular alternative donor–acceptor (D–A) type conjugated polymers using large molecular weight regioregular monomers. Using this synthetic route, various conjugated moieties can be systematically introduced in a single polymer backbone, and we developed a regioregular alternative D–A polymer, coded rr-PBTTh, based on thiophene as electron donating and benzothiadiazole as electron withdrawing groups. This new polymer possesses a highly planar conjugated backbone due to regioregularity and S⋯O and S⋯F non-covalent intramolecular conformational locks. rr-PBTTh exhibits well-balanced ambipolar transport characteristics mainly due to the balanced D–A molecular structure, and shows promising electrochromic performance with coloration efficiency up to 321.7 cm2 C−1 and rapid response time below 0.5 s.

Graphical abstract: Well-defined alternative polymer semiconductor using large size regioregular building blocks as monomers: electrical and electrochemical properties

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Publication details

The article was received on 21 Feb 2018, accepted on 19 Apr 2018 and first published on 20 Apr 2018


Article type: Paper
DOI: 10.1039/C8TC00874D
J. Mater. Chem. C, 2018,6, 5662-5670

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    Well-defined alternative polymer semiconductor using large size regioregular building blocks as monomers: electrical and electrochemical properties

    B. Lim, D. X. Long, S. Han, Y. Nah and Y. Noh, J. Mater. Chem. C, 2018, 6, 5662
    DOI: 10.1039/C8TC00874D

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