We investigate multifunctional graphene nanostructures as charge carrier mobility enablers and moisture and air barrier films for organic-based polythiophene field effect transistors. Primary results show that a tiny amount of graphene flakes blended in the polythiophene active channel could reach a ten-fold increase in effective transistor mobility. Moreover, densely packed honeycomb graphene for efficient moisture and air shielding is firstly applied on organic active channels without any supporting polymer, resulting in mild mobility degradation in ambient environment with respect to unprotected polythiophene devices. Thus, hybrid graphene-polythiophene blend transistors laminated with graphene passivation layers exhibit significantly superior and prolonged performances over 1400 h, whereas the hybrid devices without graphene passivation become unswitchable in 600 h. Moreover, their low processing temperature (<150 °C), solution processability, and flexibility of both graphene and polythiophene makes them a highly promising means for next-generation organic field effect transistors.

我们研究多功能石墨烯纳米结构作为电荷载流子迁移的促进剂以及有机基聚噻吩场效应晶体管的湿气和阻气膜。主要结果表明，在聚噻吩有源通道中掺入的少量石墨烯薄片可以使有效晶体管迁移率提高十倍。而且，首先在没有任何支撑聚合物的情况下，将用于有效水分和空气屏蔽的致密堆积的蜂窝石墨烯施加到有机活性通道上，相对于未保护的聚噻吩装置，在周围环境中导致适度的迁移率降低。因此，层压有石墨烯钝化层的混合石墨烯-聚噻吩共混晶体管在1400小时内表现出明显的优越性和延长的性能，而没有石墨烯钝化的混合器件在600小时内无法切换。此外，它们的低处理温度（<150°C），溶液可处理性以及石墨烯和聚噻吩的柔韧性使其成为下一代有机场效应晶体管的极有希望的手段。