Functionalised hexagonal-domain graphene for position-sensitive photodetectors

De Sanctis, Adolfo; Barnes, Matthew D.; Amit, Iddo; Craciun, Monica F.; Russo, Saverio

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.

Citation

De Sanctis, A., Barnes, M. D., Amit, I., Craciun, M. F., & Russo, S. (2017). Functionalised hexagonal-domain graphene for position-sensitive photodetectors. Nanotechnology, 28(12), Article 124004. https://doi.org/10.1088/1361-6528/aa5ec0

• Journal Article Type: Article
• Acceptance Date: Feb 7, 2017
• Online Publication Date: Feb 24, 2017
• Publication Date: Feb 24, 2017
• Deposit Date: Jul 5, 2018
• Publicly Available Date: Jul 6, 2018
• Journal: Nanotechnology
• Print ISSN: 0957-4484
• Electronic ISSN: 1361-6528
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 28
• Issue: 12
• Article Number: 124004
• DOI: https://doi.org/10.1088/1361-6528/aa5ec0
• Public URL: https://durham-repository.worktribe.com/output/1326792