Synthesis and TFT Properties of Fluorenyl Cored Conjugated Compound for Organic Thin Film Transistors.

The 5,5'-(4,4'-(9,9-dioctyl-9H-fluorene-2,7-diyl) bis(4,1-phenylene)) bis(2-hexylthieno[3,2-b] thiophene) FCBT (6) was synthesized by connecting the fluorenyl, thienothiophenyl and phenyl units. The compound was characterized by FT-IR, (HNMR)-N-1, (CNMR)-N-13 and mass spectroscopy. The compound has shown good solubility and thermal stability over 417 degrees C. The compound has shown hole mobility of 4.76x10(-6) cm(2)/Vs. The on-off ratio and threshold voltage were 7.5x10(2) and -8.26 V respectively.