Graphene-Si3N4 nanocomposite blended polymer counter electrode for low-cost dye-sensitized solar cells

Fadzai Lesley Chawarambwa, Tika Erna Putri, Min Kyu Son, Kunihiro Kamataki, Naho Itagaki, Kazunori Koga, Masaharu Shiratani

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Abstract

In this study equal weights of graphene and Si3N4 nanoparticles were mechanically mixed with PEDOT:PSS to a form uniform solution. Graphene-Si3N4/PEDOT:PSS (GNP-Si3N4/PEDOT:PSS) composite films were prepared by spin coating on transparent conducting glass as low-cost counter electrodes (CEs) for dye-sensitized solar cells (DSSCs). The electrocatalytic property of the GNP-Si3N4/PEDOT:PSS CE was characterized by cyclic voltammetry and electrochemical impedance spectroscopy. Finally, a DSSC based on GNP-Si3N4/PEDOT:PSS CE containing 100 mg GNP-Si3N4 achieved and an efficiency of 5.24% under simulated solar irradiation of 100 mW cm−2. This is comparable to the performance of the Pt CE which had a cell efficiency of 5.37%.

Original languageEnglish
Article number137920
JournalChemical Physics Letters
Volume758
DOIs
Publication statusPublished - Nov 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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