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<p>The goal of this research is to report a low-cost, flexible, and transparent conducting electrode comprises a thin layer of graphene deposited Polyethylene terephthalate sheet (PET). For this, we used exfoliated graphite flakes into stable dispersions of graphene using a non-covalent functionalization with 1-pyrenecarboxylic acid (PCA) rather than conventional methods used for graphene synthesis. The various bonds/peaks appear in sheets has been studied using FTIR spectroscopy in transmittance mode whereas reasonable transmittance (77%) recorded using UV–visible spectroscopy reveals direct evidence for uses of prepared sheets as transparent electrode. The electrical resistance of sheet has been measured using offset-compensated ohms measurement method and found to be 1.132 MΩ/sq signature for utilization of prepared sheet as transparent conducting electrode. The dielectric properties such as variation of capacitance and ac conductivity with frequency at RT have been studying using Impedance analyzer and reveals contribution of Grain and Grain Boundaries in Capacitance of sheets.</p>

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Optical and electric profile of 1-pyrenecarboxylic acid-functionalized graphene-based transparent flexible electrodes: role of grain and grain boundaries

  • 期刊论文

  • 发表日期：

    2026年5月23日

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  • Manpreet Kaur,
  • Sunil Kumar,
  • Viney Sharma,
  • Suresh Kumar,
  • J. K. Goswamy,
  • Twinkle

摘要

The goal of this research is to report a low-cost, flexible, and transparent conducting electrode comprises a thin layer of graphene deposited Polyethylene terephthalate sheet (PET). For this, we used exfoliated graphite flakes into stable dispersions of graphene using a non-covalent functionalization with 1-pyrenecarboxylic acid (PCA) rather than conventional methods used for graphene synthesis. The various bonds/peaks appear in sheets has been studied using FTIR spectroscopy in transmittance mode whereas reasonable transmittance (77%) recorded using UV–visible spectroscopy reveals direct evidence for uses of prepared sheets as transparent electrode. The electrical resistance of sheet has been measured using offset-compensated ohms measurement method and found to be 1.132 MΩ/sq signature for utilization of prepared sheet as transparent conducting electrode. The dielectric properties such as variation of capacitance and ac conductivity with frequency at RT have been studying using Impedance analyzer and reveals contribution of Grain and Grain Boundaries in Capacitance of sheets.