• Ligand exchange in Cu$_2$ZnSnS$_4$ nanoparticles and its effect on counter electrode performance in dye-sensitized solar cells

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/042/06/0256

    • Keywords

       

      DSSC; CZTS CEs; Pt CEs; bi-phasic ligand exchange; colloidal NPs.

    • Abstract

       

      Ligand-exchanged Cu$_2$ZnSnS$_4$ (CZTS) nanoparticles (NPs) were successfully synthesized from colloidal NPs by replacing the long chain organic ligand from the surface of NPs via a bi-phasic method. It was found that ammonium sulphide salt ((NH$_4$)$_2$S) plays a key role in changing the surface of the NPs from hydrophobic to hydrophilic. The efficacy of the ligand exchange process over the surface of the CZTS NPs was analysed using X-ray diffraction, Fourier transform infrared spectroscopy, ultraviolet–visible spectroscopy and scanning electron microscopy with energy dispersive X-ray. The ligand-exchanged CZTS NP-based counter electrodes (CEs) were fabricated by drop casting the inorganic ligand (ammonium sulphide)-capped CZTS nanoink onto the conducting substrate. Our result indicates that dye-sensitized solar cells (DSSCs) with inexpensive CZTS NP-based CEs show 2.42% efficiency. The present result indicates that CZTS CEs will be helpful as an alternative CE to a Pt CE in DSSC application.

    • Author Affiliations

       

      C IMLA MARY1 M SENTHILKUMAR1 S MOORTHY BABU1

      1. Crystal Growth Centre, Anna University, Chennai 600 025, India
    • Dates

       
  • Bulletin of Materials Science | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.