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      Junction investigation of graphene/silicon Schottky diodes

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          Abstract

          Here we present a facile technique for the large-scale production of few-layer graphene flakes. The as-sonicated, supernatant, and sediment of the graphene product were respectively sprayed onto different types of silicon wafers. It was found that all devices exhibited current rectification properties, and the supernatant graphene devices have the best performance. Schottky junctions formed between graphene flakes and silicon n-type substrates exhibit good photovoltaic conversion efficiency while graphene/p-Si devices have poor light harvesting capability.

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          Electric Field Effect in Atomically Thin Carbon Films

          S. Morozov, K. S. Novoselov, A. K. Geim … (2007)
          We report a naturally-occurring two-dimensional material (graphene that can be viewed as a gigantic flat fullerene molecule, describe its electronic properties and demonstrate all-metallic field-effect transistor, which uniquely exhibits ballistic transport at submicron distances even at room temperature.
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            Graphene: Status and Prospects

            A. K. Geim (2010)
            Graphene is a wonder material with many superlatives to its name. It is the thinnest material in the universe and the strongest ever measured. Its charge carriers exhibit giant intrinsic mobility, have the smallest effective mass (it is zero) and can travel micrometer-long distances without scattering at room temperature. Graphene can sustain current densities 6 orders higher than copper, shows record thermal conductivity and stiffness, is impermeable to gases and reconciles such conflicting qualities as brittleness and ductility. Electron transport in graphene is described by a Dirac-like equation, which allows the investigation of relativistic quantum phenomena in a bench-top experiment. What are other surprises that graphene keeps in store for us? This review analyses recent trends in graphene research and applications, and attempts to identify future directions in which the field is likely to develop.
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              Fine structure constant defines visual transparency of graphene.

              R. Nair, P. Blake, A N Grigorenko … (2008)
              There are few phenomena in condensed matter physics that are defined only by the fundamental constants and do not depend on material parameters. Examples are the resistivity quantum, h/e2 (h is Planck's constant and e the electron charge), that appears in a variety of transport experiments and the magnetic flux quantum, h/e, playing an important role in the physics of superconductivity. By and large, sophisticated facilities and special measurement conditions are required to observe any of these phenomena. We show that the opacity of suspended graphene is defined solely by the fine structure constant, a = e2/hc feminine 1/137 (where c is the speed of light), the parameter that describes coupling between light and relativistic electrons and that is traditionally associated with quantum electrodynamics rather than materials science. Despite being only one atom thick, graphene is found to absorb a significant (pa = 2.3%) fraction of incident white light, a consequence of graphene's unique electronic structure.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Nanoscale Res Lett
                Journal ID (iso-abbrev): Nanoscale Res Lett
                Title: Nanoscale Research Letters
                Publisher: Springer
                ISSN (Print): 1931-7573
                ISSN (Electronic): 1556-276X
                Publication date Collection: 2012
                Publication date (Electronic): 11 June 2012
                Volume: 7
                Issue: 1
                Page: 302
                Affiliations
                [1 ]Department of Physics and Astronomy, University of Arkansas at Little Rock, Little Rock, AR, 870-71656, USA
                Article
                Publisher ID: 1556-276X-7-302
                DOI: 10.1186/1556-276X-7-302
                PMC ID: 3512491
                PubMed ID: 22687246
                SO-VID: aa9d1c81-e209-44b9-a3be-ba7bdeb0f19d
                Copyright © Copyright ©2012 Mohammed et al.; licensee Springer.
                License:

                This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                Date received : 16 December 2011
                Date accepted : 20 April 2012
                Categories
                Subject: Nano Express

                ScienceOpen disciplines: Nanomaterials
                Keywords: schottky diode,graphene,heterojunction
                Data availability:
                ScienceOpen disciplines: Nanomaterials
                Keywords: schottky diode, graphene, heterojunction

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