LAUSR

Photodetectors based on rGO have attracted much attention owing to their simple and low-cost fabrication process. However, the aggregation and defects of rGO flakes still limit the performance of rGO photodetectors. Controlling the composition of reduced graphene oxide (rGO) has become a vital factor for its prospective applications. For example, the interconnection between rGO and polymers for modified morphologies of rGO films leads to an enhanced performance of devices. In this work, we report a practical approach to engineer surface uniformity and enhance the performance of a photodetector by modifying the rGO film with hydrophilic polymers poly(vinyl alcohol) (PVA). Compared with the rGO photodetector, the on/off ratio for the PVA/rGO photodetector has 3.5 times improvement, and the detectivity shows 53% enhancement even when the photodetector is operated at a low bias of 0.3 V. The study provides an effective route to realize PVA/rGO photodetectors with a low-power operation which show promising opportunities for the future development of green systems. This article is protected by copyright. All rights reserved.