Azaisoindigo conjugated polymers for high performance n-type and ambipolar thin film transistor applications

Wan Yue, Mark Nikolka, Mingfei Xiao, Aditya Sadhanala, Christian B. Nielsen, Andrew J P White, Hung-Yang Chen, Ada Onwubiko, Henning Sirringhaus, Iain McCulloch

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

Two new alternating copolymers, PAIIDBT and PAIIDSe have been prepared by incorporating a highly electron deficient azaisoindigo core. The molecular structure and packing of the monomer is determined from the single crystal X-ray diffraction. Both polymers exhibit high EAs and highly planar polymer backbones. When polymers are used as the semiconducting channel for solution-processed thin film transistor application, good properties are observed. A–A type PAIIDBT exhibits unipolar electron mobility as high as 1.0 cm2 V−1 s−1, D–A type PAIIDSe exhibits ambipolar charge transport behavior with predominately electron mobility up to 0.5 cm2 V−1 s−1 and hole mobility to 0.2 cm2 V−1 s−1. The robustness of the extracted mobility values are also commented on in detail. Molecular orientation, thin film morphology and energetic disorder of both polymers are systematically investigated.
Original languageEnglish (US)
Pages (from-to)9704-9710
Number of pages7
JournalJ. Mater. Chem. C
Volume4
Issue number41
DOIs
StatePublished - 2016

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