Synthesis of Donor-Acceptor Polymer for Transistors and Gas sensors
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We designed novel donor-acceptor π-conjugated polymers whose backbones and side chains were engineered to ensure stable solution-based printing. As Se has a larger p orbital than that of S, the replacement of sulfur by selenium in the thienothiophene electron-donating unit leads to a minimal change in backbone planarity, which can improve the solubility, while maintaining the high crystalline ordering of the polymeric chains. We then demonstrated their application feasibility for the formation of high-performance semiconductor films by solution-process printing.