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<p>In recent years, we have seen significant progress in the production of solar cells with high efficiency. One of the main solutions of this investigation is the performance of distinct cells under distinctive conditions with the help of simulations of their operation. This article describes the structure of multijunction solar cell consisting of Ge layers, InAlGaAs alloys and InAlGaP alloy for the first time. In order to attain optimal efficiency, the optical simulation of the bottom absorber layer of the Ge solar cell is conducted using Lumerical software. Subsequently, the electrical simulation is carried out using Silvaco software. Following the optimization of the Ge solar cell, the tunnel junctions, which are the middle layers between the cells, are then optimized. Finally, the topper absorber layers are optimized in a sequential manner. The purpose of optimizing the solar cell in each absorber layer is to achieve the highest efficiency depending on the thickness, impurity density and mole fraction of the layers. Based on the simulation results, the efficiency of more than 49% has been obtained for the mentioned five-junction solar cell.</p>

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Numerical simulation and optimization of high-efficiency multi-junction photovoltaic solar cell

  • 期刊论文

  • 发表日期：

    2025年11月19日

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  • Sina Rezanejadfard,
  • Majid Fouladian,
  • Seyed Mohammad Jalal Rastegar Fatemi

摘要

In recent years, we have seen significant progress in the production of solar cells with high efficiency. One of the main solutions of this investigation is the performance of distinct cells under distinctive conditions with the help of simulations of their operation. This article describes the structure of multijunction solar cell consisting of Ge layers, InAlGaAs alloys and InAlGaP alloy for the first time. In order to attain optimal efficiency, the optical simulation of the bottom absorber layer of the Ge solar cell is conducted using Lumerical software. Subsequently, the electrical simulation is carried out using Silvaco software. Following the optimization of the Ge solar cell, the tunnel junctions, which are the middle layers between the cells, are then optimized. Finally, the topper absorber layers are optimized in a sequential manner. The purpose of optimizing the solar cell in each absorber layer is to achieve the highest efficiency depending on the thickness, impurity density and mole fraction of the layers. Based on the simulation results, the efficiency of more than 49% has been obtained for the mentioned five-junction solar cell.