Effects of fluorination on the electrochromic performance of benzothiadiazole-based donor–acceptor copolymers

A series of thiophene and benzothiadiazole-based copolymers ( PDAT-DTBT ) is synthesized through Stille coupling polymerization with two mono- and di-fluorinated benzothiadiazole analogues: PDAT-DTBT-F (1F) and PDAT-DTBT-2F (2F). The introduction of fluorine atoms onto the conjugated polymer backbon...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2015-01, Vol.3 (21), p.5589-5597
Main Authors: Neo, Wei Teng, Ong, Kok Haw, Lin, Ting Ting, Chua, Soo-Jin, Xu, Jianwei
Format: Article
Language:English
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Summary:A series of thiophene and benzothiadiazole-based copolymers ( PDAT-DTBT ) is synthesized through Stille coupling polymerization with two mono- and di-fluorinated benzothiadiazole analogues: PDAT-DTBT-F (1F) and PDAT-DTBT-2F (2F). The introduction of fluorine atoms onto the conjugated polymer backbone is found to have a pronounced effect on the optical, electrochemical and morphological properties, which in turn, influences the electrochromic performance of the fabricated absorption/transmission type devices greatly. All the polymers switch reversibly between the colored neutral states (green/blue) to transmissive oxidized states. Systematic enhancement in the reduction process to sub-second speeds (
ISSN:2050-7526
2050-7534
DOI:10.1039/C5TC00725A