A novel method for graphene synthesis via electrochemical process and its utilization in organic photovoltaic devices


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Dericiler K., Alishah H. M. , Bozar S., GÜNEŞ S. , KAYA F.

Applied Physics A: Materials Science and Processing, vol.126, no.11, 2020 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 126 Issue: 11
  • Publication Date: 2020
  • Doi Number: 10.1007/s00339-020-04091-3
  • Title of Journal : Applied Physics A: Materials Science and Processing
  • Keywords: Graphene, Electrochemical, Synthesis, Organic, Solar, Photovoltaic, FEW-LAYER GRAPHENE, SCALABLE PRODUCTION, CARBON NANOTUBES, NICKEL-OXIDE, SOLAR-CELLS, EXFOLIATION, GRAPHITE, EFFICIENCY, COMPOSITE, PERFORMANCE

Abstract

© 2020, Springer-Verlag GmbH Germany, part of Springer Nature.Graphene nanosheets have been prepared from fine graphite powders by a novel electrochemical exfoliation method using non-volatile sulfate salts. This new method utilizes a stainless steel wire cage and platinum wire electrodes to exfoliate pre-pelleted graphite powders into graphene sheets. Synthesized graphene samples have been characterized by Field Emission Scanning Electron Microscopy (FE-SEM), Raman spectroscopy, and Fourier Transform Infrared (FT-IR) spectroscopy. The obtained supernatant shows a stable suspension in DMF. This suspension was then used in organic solar cells (OSCs) as an additive to poly(3,4-ethylene dioxythiophene) polystyrene sulfonate (PEDOT:PSS). Organic solar cells have been prepared using Indium Tin Oxide (ITO) as the transparent conducting oxide, PEDOT:PSS-Graphene as the hole transport layer (HTL), Poly(3-hexylthiophene-2,5-diyl:[6,6]-Phenyl-C60-butyric acid methyl ester (P3HT:PCBM) as the active layer and Aluminum as the cathode, in ITO/PEDOT:PSS-Graphene/P3HT:PCBM/Al configuration. The photovoltaic cell prepared with graphene as an additive inside PEDOT:PSS exhibited over 66% improvement compared to the reference cells employing pure PEDOT:PSS.