Thiazolothiazole-Containing Ambipolar Organic Semiconductor with Balanced Hole and Electron Mobility

Thiazolothiazole-containing organic semiconductors DH-TTFZTT and DPCO-TTFZTT were synthesized. Single crystal diffraction result revealed that DH-TTFZTT adopts herringbone packing in the crystals, and strong S–S and S–π intermolecular interactions were found among neighboring molecules, which form a two-dimensional network in the crystals. Thin-film transistor characteristics showed that DH-TTFZTT behaves as a p-channel semiconductor with a hole mobility of approximately 2×10−2 cm2 V−1 s−1. DPCO-TTFZTT-based devices have balanced ambipolar performance, with hole and electron mobilities as high as 2.41×10−2 cm2 V−1 s−1 and 2.36×10−2 cm2 V−1 s−1 respectively, which are some of the highest values for thiazolothiazole derivatives.