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Facile preparation of TiO2 nanoparticles decorated by the graphene for enhancement of dye-sensitized solar cell performance

  • 2D and Nanomaterials
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Abstract

In this work, graphene and graphene oxide were synthesized by the modified Hummers method. In order to use graphene in dye-sensitized solar cell (DSSC), TiO2–graphene was prepared by a simple chemical method and used in the DSSC photoanode at different concentrations of graphene to investigate DSSC performance. Utilizing the FE-SEM images, it was observed that accumulation of TiO2 nanoparticles disappeared and a different distribution of nanoparticles was formed on the graphene sheet. Moreover, the UV-vis spectra showed that TiO2–graphene nanocomposites can absorb a wide range of light in comparison with pure TiO2. Structural characterization of TiO2–graphene nanocomposites is confirmed by the FT-IR and Raman analysis. The results have shown that in the presence of graphene, the DSSC performance significantly improved by reducing the recombination. In addition, it has been shown that excess graphene concentration is not proper for DSSC performance. The best result for TiO2–graphene nanocomposite was obtained when the concentration of 1.5% graphene was applied.

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Authors and Affiliations

  1. Nanophysics Laboratory, Department of Physics, Shiraz University of Technology, Shiraz, 71557-13876, Iran

    Reza Ghayoor & Alireza Keshavarz

  2. Department of Chemistry, Shiraz University of Technology, Shiraz, 71557-13876, Iran

    Mohammad Navid Soltani Rad

Authors
  1. Reza Ghayoor
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  2. Alireza Keshavarz
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  3. Mohammad Navid Soltani Rad
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Correspondence to Alireza Keshavarz.

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Ghayoor, R., Keshavarz, A. & Soltani Rad, M.N. Facile preparation of TiO2 nanoparticles decorated by the graphene for enhancement of dye-sensitized solar cell performance. Journal of Materials Research 34, 2014–2023 (2019). https://doi.org/10.1557/jmr.2019.142

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