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Issue 20, 2016
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Ambipolar organic field-effect transistors based on diketopyrrolopyrrole derivatives containing different π-conjugating spacers

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Abstract

We report the synthesis and characterization of two new DPP-based small molecules, BTDPPCN and TTDPPCN. By variation of π-conjugating spacers from bithiophene to thieno[3,2-b]thiophene, a lower LUMO level is obtained for TTDPPCN, but both compounds have a similar band gap of about 1.6 eV. Under ambient conditions, the excellent ambipolarity of BTDPPCN is demonstrated by balanced charge carrier mobilities of 0.065 and 0.031 cm2 V−1 s−1 for n- and p-channels after thermal annealing. The FETs based on TTDPPCN films also showed ambipolar charge transport properties with a very high electron mobility of 0.80 cm2 V−1 s−1 upon thermal annealing at 90 °C and a hole mobility of 0.024 cm2 V−1 s−1 at 150 °C.

Graphical abstract: Ambipolar organic field-effect transistors based on diketopyrrolopyrrole derivatives containing different π-conjugating spacers

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Publication details

The article was received on 17 Feb 2016, accepted on 30 Mar 2016 and first published on 30 Mar 2016


Article type: Paper
DOI: 10.1039/C6TC00687F
J. Mater. Chem. C, 2016,4, 4470-4477

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    Ambipolar organic field-effect transistors based on diketopyrrolopyrrole derivatives containing different π-conjugating spacers

    G. Lin, Y. Qin, J. Zhang, Y. Guan, H. Xu, W. Xu and D. Zhu, J. Mater. Chem. C, 2016, 4, 4470
    DOI: 10.1039/C6TC00687F

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