dc.contributor.author | De Sanctis, A | |
dc.contributor.author | Mehew, J | |
dc.contributor.author | Craciun, MF | |
dc.contributor.author | Russo, S | |
dc.date.accessioned | 2018-09-13T12:15:11Z | |
dc.date.issued | 2018-09-18 | |
dc.description.abstract | Graphene and graphene-based materials exhibit exceptional optical and electrical properties with great promise for novel applications in light detection. However, several challenges prevent the full exploitation of these properties in commercial devices. Such challenges include the limited linear dynamic range (LDR) of graphene-based photodetectors, the lack of efficient generation and extraction of photoexcited charges, the smearing of photoactive junctions due to hot-carriers effects, large-scale fabrication and ultimately the environmental stability of the constituent materials. In order to overcome the aforementioned limits, different approaches to tune the properties of graphene have been explored. A new class of graphene-based devices has emerged where chemical functionalisation, hybridisation with light-sensitising materials and the formation of heterostructures with other 2D materials have led to improved performance, stability or versatility. For example, intercalation of graphene with FeCl3 is highly stable in ambient conditions and can be used to define photo-active junctions characterized by an unprecedented LDR while graphene oxide (GO) is a very scalable and versatile material which supports the photodetection from UV to THz frequencies. Nanoparticles and quantum dots have been used to enhance the absorption of pristine graphene and to enable high gain thanks to the photogating effect. In the same way, hybrid detectors made from stacked sequences of graphene and layered transition-metal dichalcogenides enabled a class of detectors with high gain and responsivity. In this work we will review the performance and advances in functionalised graphene and hybrid photodetectors, with particular focus on the physical mechanisms governing the photoresponse in these materials, their performance and possible future paths of investigation. | en_GB |
dc.description.sponsorship | Funding: M.F.C. and S.R. acknowledge financial support from: Engineering and Physical Sciences Research
Council (EPSRC) of the United Kingdom, projects EP/M002438/1, EP/M001024/1, EPK017160/1, EP/K031538/1,
EP/J000396/1; the Royal Society, grant title "Room temperature quantum technologies" and "Wearable graphene
photovolotaic"; Newton fund, Uk-Brazil exchange grant title "Chronographene" and the Leverhulme Trust,
research grants "Quantum drums" and "Quantum revolution". J.D.M. acknowledges financial support from the
Engineering and Physical Sciences Research Council (EPSRC) of the United Kingdom, via the EPSRC Centre for
Doctoral Training in Metamaterials, Grant No. EP/L015331/1. | en_GB |
dc.identifier.citation | Vol. 11 (9), article 1762 | en_GB |
dc.identifier.doi | 10.3390/ma11091762 | |
dc.identifier.uri | http://hdl.handle.net/10871/33986 | |
dc.language.iso | en | en_GB |
dc.publisher | MDPI | en_GB |
dc.rights | © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access
article distributed under the terms and conditions of the Creative Commons Attribution
(CC BY) license (http://creativecommons.org/licenses/by/4.0/). | |
dc.subject | Graphene | en_GB |
dc.subject | sensors | en_GB |
dc.subject | graphene oxide | en_GB |
dc.subject | photodetectors | en_GB |
dc.subject | functionalisation | en_GB |
dc.subject | electronic devices | en_GB |
dc.title | Graphene-based light sensing: fabrication, characterisation, physical properties and performance | en_GB |
dc.type | Article | en_GB |
dc.description | This is the final version. Available from MDPI via the DOI in this record. | en_GB |
dc.identifier.journal | Materials | en_GB |