Green synthesis of CuO nanoparticles from Cucurbita maxima leaf extract; a platinum free counter electrode for dye sensitized solar cells

Authors

  • Emma Panzi Mukhokosi Department of Physics, Faculty of Science, Kyambogo University, PO Box 1, Kampala, Uganda
  • Stephen Tenywa Department of Physics, Faculty of Science, Kyambogo University, PO Box 1, Kampala, Uganda
  • Nandipha L. Bothab College of Graduate Studies, UNESCO UNISA Africa Chair in Nanosciences & Nanotechnology, University of South Africa, Pretoria, South Africa Materials; Materials Research Department, Nanosciences African Network (NANOAFNET), iThemba LABS, PO Box 722, Cape Town, South Africa
  • Shohreh Azizi College of Graduate Studies, UNESCO UNISA Africa Chair in Nanosciences & Nanotechnology, University of South Africa, Pretoria, South Africa Materials; Research Department, Nanosciences African Network (NANOAFNET), iThemba LABS, PO Box 722, Cape Town, South Africa
  • Mathapelo Pearl Seopela Department of Chemical Sciences, University of South Africa, Auckland Park Campus, PO Box 524, Auckland Park, 2006, Johannesburg, South Africa
  • Malik Maaza College of Graduate Studies, UNESCO UNISA Africa Chair in Nanosciences & Nanotechnology, University of South Africa, Pretoria, South Africa; Materials Research Department, Nanosciences African Network (NANOAFNET), iThemba LABS, PO Box 722, Cape Town, South Africa

Keywords:

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Abstract

Green synthesis of metal oxides has attracted attention as the latest technology in synthesizing metal oxide nanoparticles due to its simplicity, cheapness, non-toxicity and its ability for large scale production. Metal oxides find applications in dye sensitized solar cells (DSSCs) as counter electrodes (CEs) and photo-anodes. However, applications of green synthesized metal oxides as counter electrodes have not been fully explored. In this study, CuO nanoparticles (NPs) were synthesized from Cucurbita maxima leaf extract and applied as a CE in DSSC. Uniformly synthesized CuO NPs were subjected to various characterization tools to obtain the crystal structure, surface morphology, particle size, optical properties, chemical bonds and photovoltaic properties. Using a natural dye from of Cucurbita maxima as a photon absorber, a short circuit current density ( Jsc) of 4.2 µA/cm2, open circuit voltage (Voc) of 0.17 V, a maximum power (Pmax) of 0.18 mW/cm2, and a power conversion efficiency (PCE) of 1.8 × 10?4 % under one-sun illumination were obtained.

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Published

2025-02-01

How to Cite

Green synthesis of CuO nanoparticles from Cucurbita maxima leaf extract; a platinum free counter electrode for dye sensitized solar cells. (2025). Journal of the Nigerian Society of Physical Sciences, 7(1), 2309. https://doi.org/10.46481/jnsps.2025.2309

Issue

Volume 7, Issue 1, February 2025

Section

Physics & Astronomy

Copyright (c) 2024 Emma Panzi Mukhokosi, Stephen Tenywa, Nandipha L. Bothab, Shohreh Azizi, Mathapelo Pearl Seopela, Malik Maaza

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Green synthesis of CuO nanoparticles from Cucurbita maxima leaf extract; a platinum free counter electrode for dye sensitized solar cells. (2025). Journal of the Nigerian Society of Physical Sciences, 7(1), 2309. https://doi.org/10.46481/jnsps.2025.2309

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