6–10 Jul 2026
University of the Western Cape
Africa/Johannesburg timezone
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Density Functional Theory Driven Numerical Analysis of High-Efficient CsGeBr3 Perovskite Solar Cells

8 Jul 2026, 16:20
1h 20m
Great Hall ( University of the Western Cape)

Great Hall

University of the Western Cape

Poster Presentation Track G - Theoretical and Computational Physics Poster Session 2

Speaker

Mr Kamogelo Sebolai (University of Johannesburg)

Description

Abstract
The research developments of innovative photovoltaic designs that not only achieve high efficiency but also remain affordable have grown significantly in recent years. In particular, the eco-friendly perovskite-based solar models show incredible promise for a sustainable energy future. Perovskites, due to their unique properties such as tunable energy bandgap, long carrier diffusion lengths, impressive electron and hole mobilities, and superior absorption coefficients, stand as viable candidates for advancing photovoltaic applications, for which they may expand photovoltaic engineering beyond traditional silicon (Si) and toxic lead (Pb)-based cell designs, which are proven to be more efficient, yet expensive and environmentally harmful [1, 2]. In this work, new findings on lead-free CsGeBr3 perovskite-based photovoltaic devices will be reported. These were computed theoretically using density functional theory (DFT) coupled with a 1-dimensional solar cell capacitance simulator (SCAPS-1D). In particular, we optimized PSCs using optoelectronic properties that we derived from DFT and Bethe-Salpeter equation (BSE), which are more realistic than analytical methods that are usually used in many studies in the literature.
References:
1. Kheswa, B.V. and S.N.T. Majola, Simulation of novel CsSnBr3 perovskite solar cells achieving efficiency of 31.62 %. Physica Scripta, 2025. 100(1): p. 015017. https://dx.doi.org/10.1088/1402-4896/ad986e
2. Dar, S.A. and B.S. Sengar, Optimization and Performance Analysis of Inorganic Lead-Free CsSnBr3 Perovskite Solar Cells Using Diverse Electron Transport Materials. Energy & Fuels, 2024. 38(9): p. 8229-8248. https://doi.org/10.1021/acs.energyfuels.4c00953

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Author

Mr Kamogelo Sebolai (University of Johannesburg)

Co-author

Mr Bonginkosi Kheswa (University of Johannesburg)

Presentation materials

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