Graphene/GaSe-Nanosheet Hybrid: Towards High Gain and Fast Photoresponse.

ABSTRACT: While high photoconductive gain has been recently achieved in graphene-based hybrid phototransistors using semiconductor two-dimensional transition/post-transition metal dichalcogenides or quantum dots sensitizers, obtaining fast photoresponse simutaneously remains a challenge that must be addressed for practical applications. In this paper we report a graphene/GaSe nanosheets hybrid photodetector, in which GaSe nanosheets provide a favorable geometric link to graphene conductive layer through van Der Waals force. After a vacuum annealing process, a high gain in exceeding 10(7) has been obtained simitaneously with a dynamic response time of around 10 ms for both light on and off. We attribute the high performance to the elimination of possible deep charge traps, most probably at the graphe

SUBMITTER: Lu R 

PROVIDER: S-EPMC4726015 | biostudies-literature | 2016 Jan

REPOSITORIES: biostudies-literature