Defect-induced enhancement and quenching control of photocurrent in few-layer graphene photodetectors

ACS Appl Mater Interfaces. 2014 May 28;6(10):7485-90. doi: 10.1021/am500865f. Epub 2014 May 13.

Abstract

A novel approach is presented for achieving an enhanced photoresponse in a few layer graphene (FLG) based photodetector that is realized by introducing defect sites in the FLG. Fabrication induced wrinkle formation in graphene presented a four-fold enhancement in the photocurrent when compared to unfold FLG. Interestingly, it was observed that the addition of few multiwalled carbon nanotubes to an FLG improves the photocurrent by two-fold along with a highly stable response as compared to FLG alone.