Synthesis, physical properties and field-effect transistors of novel thiazolothiazole–phenylene co-oligomers†
Abstract
A series of thiazolothiazole–phenylene co-oligomers was synthesized and their properties, particularly as semiconductors for OFETs, were investigated. The naphthyl and biphenyl- substituted derivatives showed p-type semiconducting behavior with hole mobilities ranging from 10−2 to 10−1 cm2 V−1 s−1. The hole mobility and on/off ratio were enhanced to 0.12 cm2 V−1 s−1 and 106 on the HMDS treated substrate. The introduction of phenyl groups as end substituents was found to be favorable for charge transport and air-stability.