alpha,omega-Dihexylthienoselenophene derivatives: a new class of high-performance semiconductors for organic thin-film transistors

alpha,omega-Dihexylthienoselenophenes (Se2Thx) are readily prepared oligomeric species that can be used as the semiconducting layer in organic thin film transistors (TFTs). These selenophene-containing oligomers exhibit high hole mobilities (0.023 and 0.16 cm(2) V-1 s(-1)) and good on/off ratio (10(5)-10(6)) that are improved relative to their sulfur-containing counterparts. X-Ray diffraction measurements and atomic force microscopy give insight into the internal structure and surface topography of the materials.