Synthesis of novel quinoidal polymers and processing for organic electronic devices

Abstract

Researches for organic semiconductors have been promoted for future flexible electronics. The structure property relationship of novel organic semiconducting materials has been explored with the development of device fabrication technique leading to understanding of charge tranport mechanism and device physics. However, further development of novel organic materials is required to step up the performance and stability. Recently, quinoidal molecules have been aroused as the promising candidate because of unique advantages with the extended π-conjugation length and high planarity. However, quinoidal molecules have been stunted due to the difficulty to purify and analyze unavoidable geometric isomers. Therefore, we synthesized the various quinoid molecules via stille polymerization with thiophene or bithiophene, poly(quinoidal thiophene-bithiophene) (PQuT-BT), which showed the unprecedent highest hole mobility of 8.09 cm2 V-1 s-1 among reported quinoidal polymers.