▎ 摘　　要

Tunable DC voltage control circuit based on a half-wave rectifier was developed using a graphene-germanium barristor. The output DC voltage level could be modulated at 30-100% of the peak voltage by controlling the Schottky barrier height between graphene and germanium using a gate bias. Owing to the simple and low-temperature integration process, this device can be used for a variable DC power supply in monolithically integrated circuits or flexible devices.