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Open AccessFeature PaperArticle

Electrical and Photovoltaic Properties of Layered Composite Films of Covalently Bonded Graphene and Single-Walled Carbon Nanotubes

1
Department of Physics, Saratov State University, Astrakhanskaya street 83, 410012 Saratov, Russia
2
School of Electrical Engineering, Aalto University, P.O. Box 13000, 00076 Aalto, Finland
3
Faculty of Science, People’s Friendship University of Russia (RUDN University) 6 Miklukho-Maklaya St, 117198 Moscow, Russia
4
Laboratory of Biomedical Nanotechnology, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya street 2-4, 119991 Moscow, Russia
*
Author to whom correspondence should be addressed.
Coatings 2020, 10(4), 324; https://doi.org/10.3390/coatings10040324
Received: 3 March 2020 / Revised: 24 March 2020 / Accepted: 26 March 2020 / Published: 28 March 2020
(This article belongs to the Special Issue Photocatalytic Surfaces for Environmental Applications)
In this paper, we present the results of a computational study of the electrical and photovoltaic properties of a perspective composite material; that is, layered composite films of covalently bonded graphene and single-walled carbon nanotubes (SWCNTs). The purpose of the study is to identify the topological patterns in controlling the electrical and photovoltaic properties of mono- and bilayer graphene/CNT composite films with a covalent bonding of a nanotube and graphene sheet, using in silico methods. This in silico study was carried out for the super-cells of mono- and bilayer graphene/CNT composite films with the CNTs (10,0) and (12,0) at distances between the nanotubes of 10 and 12 hexagons. This found that the type of conductivity of the nanotubes does not fundamentally affect the patterns of current flow in the graphene/CNT composite films. This control of the diameter of the nanotubes and the distance between them allows us to control the profile of the absorption spectrum of the electromagnetic waves in the range of 20–2000 nm. The control of the distance between the SWCNTs allows one to control the absorption intensity without a significant peak shift. This revealed that there is no obvious dependence of the integrated photocurrent on the distance between the nanotubes, and the photocurrent varies between 3%–4%. View Full-Text
Keywords: graphene/CNT composite films; topological patterns; current–voltage characteristics; density of electronic states; integrated photocurrent; absorption spectrum; photovoltaics; SCC-DFTB calculations; molecular dynamics; Kubo–Greenwood formula graphene/CNT composite films; topological patterns; current–voltage characteristics; density of electronic states; integrated photocurrent; absorption spectrum; photovoltaics; SCC-DFTB calculations; molecular dynamics; Kubo–Greenwood formula
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MDPI and ACS Style

Slepchenkov, M.M.; Mitrofanov, V.V.; Nefedov, I.S.; Glukhova, O.E. Electrical and Photovoltaic Properties of Layered Composite Films of Covalently Bonded Graphene and Single-Walled Carbon Nanotubes. Coatings 2020, 10, 324.

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