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arXiv · 2603.25921

Modeling key characteristics of high-efficiency gallium arsenide solar cells

A. V. Sachenko·V. P. Kostylyov·I. O. Sokolovskyi·A. I. Shkrebtii
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Abstract

The paper proposes a theoretical approach to modeling the key characteristics of highly efficient gallium arsenide-based solar cells (SCs), using a one-dimensional SC model. The following recombination mechanisms are considered in the modeling: radiative recombination, interband Auger recombination, Shockley-Reed-Hall (SRH) recombination, surface recombination, recombination in the space charge region (SCR), and recombination along the perimeter of the structure. A simple empirical formula is proposed to describe the recombination along the perimeter of the SC structure. The GaAs band-gap narrowing effect is also taken into consideration. The main results are obtained under the assumption that the times of Shockley-Reed-Hall recombination and recombination in the SCR are the same. The effect of photon recycling (re-emission and re-absorption) is taken into account in a model similar to the one we used previously to simulate key characteristics of high-efficiency single-crystal silicon SCs. The model additionally uses absorption analysis at different doping levels of gallium arsenide. A good agreement was achieved between the experimental and theoretical dependencies. The results obtained in this work can be used to optimize the characteristics of highly efficient SCs based on direct-band semiconductors, particularly gallium arsenide (GaAs). Keywords: solar cell, high efficiency, modeling, gallium arsenide, recombination mechanisms, external quantum efficiency, parameter optimization.

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A. V. Sachenko, V. P. Kostylyov, I. O. Sokolovskyi, A. I. Shkrebtii. 2026-03-26. Modeling key characteristics of high-efficiency gallium arsenide solar cells. https://arxiv.org/abs/2603.25921

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