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Organic semiconducting material
Takimiya et al. have developed 2,7-diphenyl[1]benzothieno[3,2-b][1]benzothiophene 1 which includes chalcogen atoms in the molecule, and reported that it showed excellent properties as a semiconductor. According to their results, the field-effect mobility of the thin film device using 1 is very high, and indicates a high value comparable as pentacene which has been researched actively as semiconductor. Moreover, it has high durability, and semiconducting properties were maintained for over 100 days.
K. Takimiya, H. Ebata, K. Sakamoto, T. Izawa, T. Otsubo, Y. Kunugi, J. Am. Chem. Soc., 2006, 128, 12604.