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Durham University

Department of Engineering

Staff Profile

Publication details for Dr Iddo Amit

De Sanctis, Adolfo, Barnes, Matthew D., Amit, Iddo, Craciun, Monica F. & Russo, Saverio (2017). Functionalised hexagonal-domain graphene for position-sensitive photodetectors. IOP Nanotechnology 28(12): 124004.

Author(s) from Durham

Abstract

Graphene's unique photoresponse has been largely used in a multitude of optoelectronics applications ranging from broadband photodetectors to wave-guide modulators. In this work we extend the range of applications to position-sensitive photodetectors (PSDs) using FeCl3-intercalated hexagonal domains of graphene grown by atmospheric pressure chemical vapour deposition (APCVD). The FeCl3-based chemical functionalisation of APCVD graphene crystals is affected by the presence of wrinkles and results in a non-uniform doping of the graphene layers. This doping profile creates multiple p–p+ photoactive junctions which show a linear and bipolar photoresponse with respect to the position of a focused light spot, which is ideal for the realization of a PSD. Our study paves the way towards the fabrication of flexible and transparent PSDs that could be embedded in smart textile and wearable electronics.