Aza-anthradithiophene-based conjugated polymers: Synthesis and field-effect transistor application

Authors：Cai, Wenyu; Hua, Yu; Kim, Min-Jae; Lee, Jiyun; Cheng, Sheng; Kang, Boseok^*; Zhang, Guobing^*; Ding, Yunsheng

Source：Synthetic Metals, 2023, 296: 117370.

DOI：10.1016/j.synthmet.2023.117370

• Anthradithiophene
• Aza-anthradithiophene-based conjugated
• polymers
• Field-effect transistors

Acenedithiophenes are classical fused-ring units for constructing conjugated polymers. In this work, a new aza-anthradithiophene unit has been designed and was for the first time employed as building unit to constructing conjugated polymers for organic field-effect transistors. Two conjugated polymers based on thiophthene (P1) and benzothiadiazole (P2) as co-units were synthesized by Stille and Suzuki coupling reactions, respectively. The thermal stability, optical and electrochemical properties, and microstructure were investigated. Organic field-effect transistor devices based on conjugated polymers as semiconductor layer were also fabricated and two polymers exhibited typical hole transport characteristics with the average field-effect mobility up to 7.9 x 10-4 cm2V- 1s- 1 and Ion/Ioff ratios over 104.