The development of pBTTT
The further development of organic semiconductors to be utilised in field-effect transistors (OFETs) for incorporation into lightweight, flexible electronic devices, requires high performing, solution processable materials. Polymeric semiconductors offer an attractive combination in terms of appropriate solution rheology for printing processes, mechanical flexibility for rollable processing and applications, but their electrical performance has been significantly lower than amorphous silicon, limiting their application. In this work, we report the design, synthesis and characterisation of a range of liquid crystalline pi conjugated thieno[3,2-b]thiophene co-polymers (pBTTT) exhibiting high charge carrier mobilities. A detailed study of the polymer thin film morphology by both AFM and XRD reveals an extremely ordered and oriented microstructure. Field effect transistors were fabricated, and their performance and lifetimes will be discussed.
McCulloch, I.; Bailey, C.; Heeney, M.; Shkunov, M.; Sparrowe, D.; Tierney, S.; Chabinyc, M. ; Kline, J. The development of pBTTT. 2007 MRS Spring Meeting; 2007 April 9-13; San Francisco; CA.