The development of high-performance direct-current (DC) nanogenerators with good flexibility in wearable devices has always been a major challenge. A potential solution is developing the flexible Schottky nanogenerators to output DC power by introducing Schottky interfaces between metals and flexible semiconductors to directionally transfer the mechanically excited carriers. However, the DC output of existing flexible Schottky nanogenerators is limited by the moderate carrier transfer at the interface. Herein, we propose the utilization of moisture-induced electric field to boost carrier transfer at Schottky interface. This strategy is demonstrated viable in a flexible Schottky junctions comprising of an asymmetric graphene oxide (aGO) layer and an aluminum foil, which works by a new mechanism and outperforms existing flexible semiconductor-based DC nanogenerators by several orders of magnitude in both current density (81.06 A m⁻²) and power density (24.08 W m⁻²) and the mechanic-to-electricity conversion efficiency can achieve to 2.29%. In addition, because the nanogenerator can respond to both moisture and mechanical changes, it can also serve as a self-powered sensor to monitor human respiratory and body surface sweat levels simultaneously, so as to guide people in training more scientifically. This strategy would initiate a direction of next-generation wearable nanogenerators and sensors.

在可穿戴设备中开发具有良好灵活性的高性能直流（DC）纳米发电机一直是一项重大挑战。一个潜在的解决方案是开发柔性肖特基纳米发电机，通过在金属和柔性半导体之间引入肖特基界面来定向传输机械激发的载流子，从而输出直流电源。然而，现有柔性肖特基纳米发电机的直流输出受到界面处适度载流子转移的限制。在此，我们建议利用湿气诱导的电场来促进肖特基界面处的载流子转移。这种策略在由不对称氧化石墨烯 (aGO) 层和铝箔组成的柔性肖特基结中被证明是可行的， A  m ^-2 )和功率密度(24.08  W  m ^-2 )和机电转换效率可达到2.29%。此外，由于纳米发电机可以同时响应水分和机械变化，还可以作为自供电传感器同时监测人体呼吸和体表汗液水平，从而更科学地指导人们进行训练。这一战略将开启下一代可穿戴纳米发电机和传感器的方向。