Triisopropylsilylethynyl-functionalized anthradithiophene derivatives for solution processable organic field effect transistors

Two different solution processable anthradithiophenes were used as semiconductor material in top gate organic field effect transistors (OFETs) on flexible substrates. We observed good crystallization of the material in thin layers and determined charge carrier mobilities of up to 0.6 cm2/Vs. This value is only half of the mobility of the today best material triisopropylsilylethynyl-pentacene. Furthermore our OFETs show very good air stability over more than 20 months without significant changes of the mobility or on/off-ratio.