[10a-S222-1~12] 12.4 Organic light-emitting devices and organic transistors

△ [10a-S222-4] Impact of Isomeric Structure on Charge Transport Properties in Bithiophenedione-Based π-Conjugated Polymers

〇(P)Tsubasa Mikie¹, Aiko Fukazawa², Shigehiro Yamaguchi³, Itaru Osaka¹ (1.Hiroshima Univ., 2.iCeMS Kyoto Univ., 3.Nagoya Univ.)

Keywords:Organic field-effect transistor, Semiconducting polymer, Thienoquinoid

Thienoquinoids having electron-withdrawing groups are interesting building units for organic electronic materials since they offer deep frontier molecular orbital energy levels. We have recently reported that π-conjugated polymers based on thienoquinoids with the carbonyl group showed very small bandgap of around 1 eV, deep LUMO energy levels, and ambipolar properties. Here, we synthesized two π-conjugated polymers based on isomeric bithiophenediones, PSP4T and PBTD4T. We will show the electronic properties, thin film structures, and organic field-effect transistor performances of these polymers. We will also discuss in detail how the isomeric structure impacts these polymer properties.