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.
@article{arxiv.2603.25921,
title = {Modeling key characteristics of high-efficiency gallium arsenide solar cells},
author = {A. V. Sachenko and V. P. Kostylyov and I. O. Sokolovskyi and A. I. Shkrebtii},
journal= {arXiv preprint arXiv:2603.25921},
year = {2026}
}