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<p>In this research, we aim to enhance the performance of new materials by deliberately mixing graphene nanomaterials (Gr) with ZnS and adding PEDOT:PSS as a catalyst, leveraging its unique optical properties through a robust composite structure. A chemical method was used to fabricate graphene-ZnS hybrid composites and graphene-ZnS/PDOT:PSS nanocomposites. Three ratios of graphene-ZnS, 1:1, 3:1, and 5:1, were studied, with the 3:1 ratio selected for optimization. This ratio was mixed with PEDOT:PSS using the precipitation method to prepare the Gr:ZnS/PEDOT:PSS nanocomposite. The crystal structure of the samples was characterized by XRD. SEM images revealed that the graphene-ZnS hybrid nanoparticles have a thin-sheet, flaky, layered structure that favorably promotes nanoparticle adsorption. The inclusion of PEDOT:PSS enhanced both optical and structural properties because of a more uniform distribution of nanoparticles. AFM measurements of surface roughness and grain distribution indicated that the PEDOT:PSS-deposited surface was smoother, reducing electron scattering and facilitating electrical conduction. PL measurements showed a red shift in the graphene-ZnS hybrid composite compared to ZnS nanoparticles. The energy band gap of the composite decreased upon doping with PEDOT:PSS, which introduced additional energy levels and increased light-harvesting capability.</p>

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Optical and Structural Analysis of Graphene: ZnS Nanocomposite Deposited on PEDOT: PSS in Advanced Optoelectronic Devices

  • 期刊论文

  • 发表日期：

    2025年11月13日

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  • Nourhan Adel Fagry Al-deen,
  • Ghaida Salman Muhammed

摘要

In this research, we aim to enhance the performance of new materials by deliberately mixing graphene nanomaterials (Gr) with ZnS and adding PEDOT:PSS as a catalyst, leveraging its unique optical properties through a robust composite structure. A chemical method was used to fabricate graphene-ZnS hybrid composites and graphene-ZnS/PDOT:PSS nanocomposites. Three ratios of graphene-ZnS, 1:1, 3:1, and 5:1, were studied, with the 3:1 ratio selected for optimization. This ratio was mixed with PEDOT:PSS using the precipitation method to prepare the Gr:ZnS/PEDOT:PSS nanocomposite. The crystal structure of the samples was characterized by XRD. SEM images revealed that the graphene-ZnS hybrid nanoparticles have a thin-sheet, flaky, layered structure that favorably promotes nanoparticle adsorption. The inclusion of PEDOT:PSS enhanced both optical and structural properties because of a more uniform distribution of nanoparticles. AFM measurements of surface roughness and grain distribution indicated that the PEDOT:PSS-deposited surface was smoother, reducing electron scattering and facilitating electrical conduction. PL measurements showed a red shift in the graphene-ZnS hybrid composite compared to ZnS nanoparticles. The energy band gap of the composite decreased upon doping with PEDOT:PSS, which introduced additional energy levels and increased light-harvesting capability.