Ambipolar organic semiconductors, especially those with high and balanced hole and electron mobility, have potential applications in complementary circuits and light-emitting transistors. Although great progress has been made, organic ambipolar semiconductors with high and balanced performance are still rare.
Hongxiang Li and co-workers at Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, China, prepared thiazolothiazole-containing ambipolar semiconductors including DPCO-TTFZTT (pictured). This material was synthesized from 5-hexanoyl-2,2’-bithiophene. The resultant cystals were shown to adopt herringbone packing and strong S–S and S–π intermolecular interactions were found among neighboring molecules, which form a two-dimensional network in the crystals.
DPCO-TTFZTT-based devices displayed good transistor performance with balanced ambipolar performance. The hole and electron mobilities were 2.41·10–2 cm2V–1s–1 and 2.36·10–2 cm2V–1s–1, respectively, which are some of the highest values obtained for thiazolothiazole derivatives.
- Thiazolothiazole-Containing Ambipolar Organic Semiconductor with Balanced Hole and Electron Mobility,
Yuanyuan Wang, Qiuliu Huang, Zhiqiang Liu, Hongxiang Li,
Asian J. Org. Chem. 2014, 3, 134–139.