▎ 摘　　要

All-solution-processed reduced graphene oxide (rGO)-based flexible photodetectors (PDs) with asymmetric electrode structures of Ag nanowires (NWs) Cu NWs are demonstrated for stable photodetection in weak-light environments. At first, we aimed to optimize the fabrication parameters of rGO layers for minimum roughness and high uniformity according to the field emission scanning electron microscope (FESEM) images; the average absorbance of optimal rGO layers is similar to 17.4% from 400 to 1600 nm. Additionally, compared to Ag NWs Ag NWs and Cu NWs - Cu NWs electrodes, rGO PDs with Ag NWs-Cu NWs asymmetric electrodes showed a higher photocurrent-to-dark-current ratio (PDCR) (similar to 6), which was due to the improved carrier transport with using Ag and Cu as cathodes and anodes. Furthermore, the highest photoresponsivity (5.5 mA/W) and detectivity (D*) (similar to 1 x 10(9) cm Hz(1/2)/W) of rGO PDs with Ag NWs - Cu NWs electrodes have been measured and evaluated at 8 V bias. This work demonstrates the significant potential of all-solution processed rGO-based flexible PDs for high-performance and low-cost photosensing applications.