A “Kite” Shaped Styryl End-Capped Benzo[2,1-b:3,4-b′]dithiophene with High Electrical Performances in Organic Thin Film Transistors
Journal of the American Chemical Society2008Vol. 130(52), pp. 17681–17683
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Y. Didane, Georg H. Mehl, Atsufumi Kumagai, Noriyuki Yoshimoto, Christine Videlot‐Ackermann, Hugues Brisset
Abstract
The bridging of distyryl-bithiophene leads to a kite shape of the conjugated system. This twist is not like twistacenes or twist deformation in alpha-oligothiophenes but a curvature such as in bowl shaped systems. Initially perceived to be undesirable, this new semiconductor in OTFT devices provides excellent performances in air, mu = 0.1 cm(2)/V.s, I(on)/I(off) > 10(6), S < 4 V/decade, higher by a factor of 5 to the parent unbridged coplanar analogue.