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      https://www.ias.ac.in/article/fulltext/boms/040/07/1371-1377

    • Keywords

       

      TiO$_2$; graphene; nanocomposites; DSSCs; photoanode.

    • Abstract

       

      TiO$_2$–graphene (TGR) nanocomposites with varying concentrations of graphene from 0 to 1 wt% were preparedby direct mix method. X-ray diffraction (XRD) spectra confirmed the incorporation of graphene in photoanode material,which was further supported by field emission scanning electron microscopy (FESEM) and energy dispersive X-ray (EDX).The UV–visible spectrum of these nanocomposites shifted towards higher wavelength region as compared to pure TiO$_2$ thatindicated a reduced band gap and hence, enhanced absorption bandwidth. Significant reduction in electron–hole recombinationwas confirmed from photoluminescence spectroscopy. These TGR nanocomposite films after tethering with black dyewere employed as photoanodes in dye-sensitized solar cells (DSSCs). The efficiency of solar cells at varying concentrationsof graphene (in photoandes) was also investigated. TGR 0.25 wt% nanocomposite showed the highest photocurrent density(JSC) of 18.4 mA cm$^{−2}$ and efficiency ($\eta$) of 4.69%.

    • Author Affiliations

       

      BULKESH SIWACH1 DEVENDRA MOHAN1 SUNITA SHARMA2 DIVYA JYOTI3

      1. Laser Laboratory, Department of Physics, Guru Jambheshwar University of Science and Technology, Hisar 125001, India
      2. Department of Applied Science, The NorthCap University, Gurgoan 122017, India
      3. Department of Physics, University College, Faridkot 151202, India
    • Dates

       
  • Bulletin of Materials Science | News

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