Chlorination as a useful method to modulate conjugated polymers: balanced and ambient-stable ambipolar high-performance field-effect transistors and inverters based on chlorinated isoindigo polymers
Ambipolar transport behavior in isoindigo-based conjugated polymers is observed for the first time. Fluorination on the isoindigo unit effectively lowers the LUMO level of the polymer and significantly increases the electron mobility from 10(-2) to 0.43 cm(2) V(-1) s(-1) while maintaining high hole mobility up to 1.85 cm(2) V(-1) s(-1) for FET devices fabricated in ambient. Further investigation indicates
首次观察到基于异靛蓝的共轭聚合物的双极性传输行为。异靛蓝单元上的氟化有效地降低了聚合物的 LUMO 水平,并显着增加了电子迁移率从 10(-2) 到 0.43 cm(2) V(-1) s(-1),同时保持高达 1.85 cm 的高空穴迁移率(2) V(-1) s(-1) 对于在环境中制造的 FET 器件。进一步的研究表明,氟化也会影响聚合物主链的链间相互作用,从而导致薄膜中不同的聚合物堆积。