Abstract
Electrochromic technologies require electrochromic π-conjugated polymers to reversibly transition between highly transmissive and broadly absorbing achromatic states, fast response time, and high kinetic stability. In this work, yellow-to-transmissive electrochromic poly(dibenzothiophene/dibenzofuran-bithiophene) (PDBT-2Th and PDBF-2Th) were prepared by electropolymerization of monomers DBT-2Th and DBF-2Th. Attaching bithiophene at both the 2 and 8 positions of dibenzothiophene and dibenzofuran, the extended conjugation of both electrochromic π-conjugated polymers showed good redox activity with two obvious redox peaks, high optical contrast (41% at 950 nm, PDBF-2Th), favorable response time (1.4 s for PDBT-2Th), decent coloration efficiency (359 cm2 C−1 at 547 nm, PDBF-2Th), and excellent kinetic stability (both remained 93% after 1000 s).
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Funding
This study was financially supported by the Zhongshan Science and Technology Public Projects (2019B2061) and PhD Early Development Program of University of Electronic Science and Technology of China Zhongshan Institute (419YKQN16, 419YKQN07).
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Lin, K., Ming, S., Chen, S. et al. Yellow-to-transmissive electrochromic poly(dibenzothiophene/dibenzofuran-bithiophene). J Solid State Electrochem 24, 1387–1396 (2020). https://doi.org/10.1007/s10008-020-04623-0
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DOI: https://doi.org/10.1007/s10008-020-04623-0