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Issue 16, 2019
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Broad spectrum absorption and low-voltage electrochromic operation from indacenodithieno[3,2-b]thiophene-based copolymers

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Abstract

Electrochromic performance of conjugated polymers has quickly become an important design factor in a variety of applications. There is still significant need to develop highly stable materials with high optical contrast, desired colour switching and fast kinetics. Here, poly[indacenodithieno[3,2-b]thiophene-2,8-diyl] (PIDTT) is introduced as a new type of electrochromic polymer exhibiting a narrow absorption band, excellent electrochemical stability and fast colour switching kinetics between vibrant red (peak maximum at ∼550 nm) and transparent (peak maximum at ∼920 nm) within a low potential range of 0–0.8 V. To widen the spectral coverage of the well-functioning PIDTT over the entire visible range, a modified donor–acceptor approach is used by incorporating three different donor–acceptor–donor (DAD) segments into an indacenodithieno[3,2-b]thiophene (IDTT) based polymer backbone, so as to obtain three different alternating copolymers. This design motif is further rationalized by the maintained electrochemical stability of the new copolymers, and their full colour switching between black and transparent down to an ultra-low potential range of 0–0.6 V.

Graphical abstract: Broad spectrum absorption and low-voltage electrochromic operation from indacenodithieno[3,2-b]thiophene-based copolymers

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Supplementary files

Article information


Submitted
17 Dec 2018
Accepted
11 Mar 2019
First published
12 Mar 2019

This article is Open Access

Polym. Chem., 2019,10, 2004-2014
Article type
Paper

Broad spectrum absorption and low-voltage electrochromic operation from indacenodithieno[3,2-b]thiophene-based copolymers

K. Bini, P. Murto, S. Elmas, M. R. Andersson and E. Wang, Polym. Chem., 2019, 10, 2004
DOI: 10.1039/C8PY01787E

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