Phenanthro[1,2-b:8,7-b']dithiophene: A new picene-type molecule for transistor applications

Yasushi Nishihara, Megumi Kinoshita, Keita Hyodo, Yasuhiro Okuda, Ritsuko Eguchi, Hidenori Goto, Shino Hamao, Yasuhiro Takabayashi, Yoshihiro Kubozono

    Research output: Contribution to journalArticlepeer-review

    28 Citations (Scopus)


    A new picene-type molecule, phenanthro[1,2-b:8,7-b']dithiophene, has been synthesized for use in organic field-effect transistors (OFETs). The molecule consists of a phenanthrene core with two thiophene rings fused on the ends. This molecule can be recognized as a picene analogue. The electronic structure of the molecule was determined by its optical absorption spectrum together with a theoretical calculation based on density functional theory (DFT). The topological and electronic structures of thin films produced by direct thermal evaporation of the compounds and by deposition from a solution were characterized by optical imaging, X-ray diffraction, and atomic force microscopy. FET devices were fabricated with these thin films, and showed field-effect mobility as high as 10-1 cm2 V-1 s-1.

    Original languageEnglish
    Pages (from-to)19341-19347
    Number of pages7
    JournalRSC Advances
    Issue number42
    Publication statusPublished - Nov 14 2013

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)


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