2,5-Bis(2-octyldodecyl)pyrrolo[3,4-c]pyrrole-1,4-(2H,5H)-dione-based donor-acceptor alternating copolymer bearing Benzothieno[3,2-b] benzothiophene as an organic semiconductor and its application to thin film transistors

Ji Ho Kim, Kyung Hwan Kim, Dae Hee Lee, Da Seul Yang, Dong Uk Heo, Tae Wan Lee, Min Ju Cho, Dong Hoon Choi

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    New diketopyrrolopyrrole (DPP)-containing conjugated polymer such poly (benzothieno[3,2-b]benzothiophene-2,5-bis(2-octyldodecyl)-6-(thiophen-2-yl) pyrrolo [3,4-c]pyrrole-1,4(2H,5H)-dione) was successfully synthesized via Horner-Emmons condensation. The polymer showed a low bandgap energy (Eg = 1.56 eV) in a film state. The polymer also exhibits good solubility in common organic solvents and good self-film-forming properties. The semiconducting properties of the polymer synthesized herein were evaluated in organic thin film transistors (OTFTs). The polymer exhibits charge carrier mobilities as high as 3.0 × 10-3 cm2V-1s-1 (I on/off = 105) after thermal annealing at 200°C for 10 min, which is three times higher than that of thin film transistor made of the pristine film.

    Original languageEnglish
    Pages (from-to)38-44
    Number of pages7
    JournalMolecular Crystals and Liquid Crystals
    Volume581
    Issue number1
    DOIs
    Publication statusPublished - 2013 Jan 1

    Bibliographical note

    Funding Information:
    This research was supported by National Research Foundation of Korea (NRF2012R1A2A1A01008797 & 20110026418) and by Key Research Institute Program through the NRF funded by the Ministry of Education, Science and Technology (NRF20100020209).

    Keywords

    • Benzothienobenzothiophene
    • conjugated polymer
    • diketopyrrolopyrrole
    • mobility
    • organic thin film transistor
    • semiconductor

    ASJC Scopus subject areas

    • General Chemistry
    • General Materials Science
    • Condensed Matter Physics

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