"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Fabrication of low-cost Pt-free counter electrode for dye-sensitized solar cell and asymmetric supercapacitor electrode material based on rGO/CoFe2O4 nanocomposites for a viewpoint of energy conversion and storage devices

M. MANIKANDAN1,2, V. ANTO FERADRICK SAMSON1, E. MANIKANDAN1,2,* , K. A. KARTHIGEYAN3,*

Affiliation

  1. Centre for Advanced Materials and Innovative Technologies, Vellore Institute of Technology, Chennai 600127, India
  2. School of Electronics Engineering, Vellore Institute of Technology, Chennai 600127, India
  3. Department of ECE, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai, Tamilnadu, India

Abstract

The significant production of dye-sensitized solar cells (DSSCs) relies on the development of economical counter electrode (CE) equipment among superior electrocatalytic and electrochemical activity. Here, rGO/CoFe2O4 (rCoF) nanocomposites have been effectively created by one-pot hydrothermal technique and serve as counter electrodes for DSSCs. The loosely bound cobalt ferrite (CoF) nanoparticles were scattered on together faces of reduced graphene oxide (rGO) indicating a multilayer structure developing a free channel for particle diffusion. Correspondingly, the structural changes and the electrocatalytic features of rCoF nanocomposites were examined. The rCoF-50 CE demonstrated remarkable catalytic activity by speed up the reduction of triiodide ions in DSSCs due to its peculiar structural property and favourable chemical compositions. The DSSC assembled with rCoF-50 CE exhibits excellent power conversion efficiency (PCE) of 9.05%, that is larger than to facilitate of DSSC assembled among Pt (8.5%) and rCoF-25 (7.6%) CEs. This CE is also examined as an electrode for supercapacitors. Therefore, the device reaches a high specified capacity of 388.7 Fg-1 at 1 Ag-1, and maintains 90.5% of capacity retention gone 2000 cycle at a current density of 3 Ag-1, which clearly explains its capability for energy storage. The exceptional capacities behaviour and photovoltaic performances of rCoF-50 CE integrated with solar energy conversion and storage shows promising anticipation for innumerable extensive uses..

Keywords

rGO/CoFe2O4, DSSCs, Asymmetric supercapacitor: photo storage devices.

Submitted at: April 9, 2024
Accepted at: April 15, 2025

Citation

M. MANIKANDAN, V. ANTO FERADRICK SAMSON, E. MANIKANDAN, K. A. KARTHIGEYAN, Fabrication of low-cost Pt-free counter electrode for dye-sensitized solar cell and asymmetric supercapacitor electrode material based on rGO/CoFe2O4 nanocomposites for a viewpoint of energy conversion and storage devices, Journal of Optoelectronics and Advanced Materials Vol. 27, Iss. 3-4, pp. 144-159 (2025)