A versatile star-shaped organic semiconductor based on benzodithiophene and diketopyrrolopyrrole

He, Qiao and Shahid, Munazza and Panidi, Julianna and Marsh, Adam V. and Huang, Wentao and Dabóczi, Mátyás and Kim, Ji-Seon and Fei, Zhuping and Anthopoulos, Thomas D. and Heeney, Martin (2019) A versatile star-shaped organic semiconductor based on benzodithiophene and diketopyrrolopyrrole. JOURNAL OF MATERIALS CHEMISTRY C, 7 (22). pp. 6622-6629. ISSN 2050-7526

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Abstract

We report the synthesis of a new star-shaped p-conjugated oligomer, BDT(DPP)4, containing a benzodithiophene core and four diketopyrrolopyrrole arms. The thermal, electrochemical and optical properties are characterized and the results complemented by computational studies. The utility of the molecule is demonstrated in both solar cell and field-effect transistor devices. In the former, BDT(DPP)4 displays low efficiency when used as an acceptor in blends with poly(3-hexylthiophene) but exhibits promising performance as a donor, in blends with either a fullerene or a non-fullerene acceptor. In field-effect transistors BDT(DPP)4 exhibits typical p-type transistor behavior, which is in accordance with its better donor performance in solar cell devices.

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