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Study of electrical conductivity and photoelectric response of liquid phase exfoliated graphene thin film prepared via spray pyrolysis route

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2020, 30(4), pp.417-423
  • DOI : 10.1007/s42823-019-00111-2
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : July 20, 2019
  • Accepted : November 21, 2019
  • Published : August 1, 2020

Vasanthi V. 1 Logu T. 1 Ramakrishnan V. 1 Anitha K. 1 Sethuraman K. 1

1Madurai Kamaraj University,

Accredited

ABSTRACT

Facile process for the fabrication of multi-layer graphene thin flm (MLGF) is reported here. Multi-layer graphene dispersion prepared by liquid-phase exfoliation of graphite was sprayed on a glass substrate by spray pyrolysis method. The structural, optical and electrical properties of the deposited MLGF are investigated. The sheets of graphene are deposited uniformly on the substrate and distribution of small graphene sheets with size of 300–500 nm can be observed in SEM image. AFM and micro-Raman results ensured that the spray-coated graphene thin flm is composed of multi-layer graphene sheets. Spray coated graphene thin flm showed signifcant optical transparency of 57% in the visible region (400–550 nm). MLGF pos�sessed the electrical conductivity in the order of 744 S/m with surface resistivity of 3.54 k Ω/sq. The prepared liquid-phase exfoliated graphene thin flm showed superior photoelectric response. The results of this study provided a framework for fabricating an optimized MLGF using a spray pyrolysis route for optoelectronics devices.

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