An Asymmetric Furan/Thieno[3,2‐b]Thiophene Diketopyrrolopyrrole Building Block for Annealing‐Free Green‐Solvent Processable Organic Thin‐Film Transistors

• DOI: 10.1002/marc.201800225
• Publication Date: 2018-06-21T09:41:13Z
• Authors: Shang Ding; Zhenjie Ni; Mengxiao Hu; Gege Qiu; Jie Li; Jun Ye; Xiaotao Zhang; Feng Liu; Huanli Dong; Wenping Hu
• Keywords: Furan; Acceptor; Organic semiconductor

A new asymmetric furan and thieno[3,2-b]thiophene flanked diketopyrrolopyrrole (TTFDPP) building block for conjugated polymers is designed used to generate a donor-acceptor semiconducting polymer, poly[3-(furan-2-yl)-2,5-bis(2-octyldodecyl)-6-(thieno[3,2-b]thiophen-2-yl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione-alt-thieno[3,2-b]thiophene] (abbreviated PTTFDPP-TT), consisting of TTFDPP unit copolymerized with comonomer (TT), which further synthesized. Results demonstrate that PTTFDPP-TT-based thin-film transistors in bottom-gate bottom-contact device configuration exhibit typical hole-transporting property, weak temperature dependence charge carrier mobility from room 200 °C. In addition, the good solubility PTTFDPP-TT due incorporation polar an structure makes it able be solution processed less toxic nonchlorinated solvent such as toluene, demonstrating comparable performance prepared chlorinated solution. These results suggest promising organic semiconductor candidate annealing-free, environmentally benign, energy-consuming applications large-area flexible electronic devices.