Effect of Grain Size on Spectral Response and Eternal Quantum Efficiency of a Polycrystalline Bifacial Silicon Solar Cell

Adama NDIAYE^1, , Amadou DIAO¹, Mountaga BOIRO¹, Ibrahima TOURE¹ and Senghane MBODJI²

¹Semiconductors and Solar Energy Laboratory, Department of Physics, Faculty of Sciences and Techniques, Cheikh Anta Diop University, Dakar / Senegal

²Research Team in Renewable Energies, Materials and Laser, Department of Physics, UFR SATIC, Alioune Diop University, Bambey / Senegal

Cite this paper:
Adama NDIAYE, Amadou DIAO, Mountaga BOIRO, Ibrahima TOURE and Senghane MBODJI. Effect of Grain Size on Spectral Response and Eternal Quantum Efficiency of a Polycrystalline Bifacial Silicon Solar Cell. American Journal of Materials Science and Engineering. 2024; 12(2):30-34. doi: 10.12691/ajmse-12-2-2

Abstract

In this work, a 3D theoretical study of a grain columnar model of a bifacial silicon solar cell under monochromatic illumination, is done. From the continuity equation of the photocreated minority carriers in the base of the cell, we determined the expression of the minority carriers’ density according to the wavelength, the grain size, the recombination velocity at grain boundaries and the recombination velocities at the junction and the rear side. By the use of the minority carriers’ density, the expressions of the photocurrent density, the spectral response and the external quantum efficiency have been deduced. We noted an improvement in spectral response and quantum efficiency with the increase of the grain size. Although, the recombination velocity at the grain boundaries leads to a decrease in spectral response and quantum efficiency; what corresponds to a poor quality of the solar cell since there is a degradation of its intrinsic properties.

Keywords:
bifacial photocell grain size wavelength spectral response quantum efficiency

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