The advancement of Internet of Things has stimulated huge demands on low-voltage flexible electronics. Carbon-nanotube (CNT)-based electronics are of great promise to this end for their intrinsic flexibility, high carrier mobility, and capability to synthesize as semiconducting or metallic to serve as the channels, electrodes, and interconnects of circuits. However, the gate dielectric often has to adopt brittle oxides, which can seriously limit the device flexibility. Herein, we show that a hybrid polyimide-Al₂O₃ material can serve as a good gate dielectric to realize truly intrinsic flexibility of transistors and circuits based on CNTs. With this hybrid dielectric, high-performance all-CNT transistors and integrated circuits of inverters, ring oscillators, and logic gates are demonstrated. Particularly, the inverters exhibit a remarkably high gain of 342.5 and can be used as an analog amplifier for millivolt small signals. Ultralow voltage (50 mV) operation is also feasible, which highlights the great promise for low-power applications.

物联网的进步刺激了对低压柔性电子产品的巨大需求。基于碳纳米管 (CNT) 的电子产品因其固有的灵活性、高载流子迁移率以及合成半导体或金属以用作电路的通道、电极和互连的能力而大有希望。然而，栅极电介质往往不得不采用脆性氧化物，这会严重限制器件的灵活性。在此，我们展示了一种杂化聚酰亚胺-Al ₂ O ₃材料可以用作良好的栅极电介质，以实现基于 CNT 的晶体管和电路的真正内在灵活性。使用这种混合电介质，展示了高性能全碳纳米管晶体管和逆变器、环形振荡器和逻辑门的集成电路。特别是，反相器具有非常高的 342.5 增益，可用作毫伏小信号的模拟放大器。超低电压 (50 mV) 操作也是可行的，这凸显了低功耗应用的巨大前景。