EFFICIENCY DEPENDENCE OF A SINGLE P–N JUNCTION GAAS SOLAR CELL ON SOLAR CONCENTRATION
Keywords:
GaAs solar cell; Solar concentration; Vertical structure; Single p–n junction; Sentaurus TCAD; Efficiency.Abstract
This study investigates the performance of gallium arsenide (GaAs) solar cells under concentrated sunlight conditions. Although GaAs solar cells achieve 27.6% efficiency at 255 suns, their efficiency drops to about 24% at nearly 1000 suns due to saturation and enhanced recombination losses. To overcome this limitation, a single p–n junction vertical GaAs solar cell structure is proposed and simulated using the Sentaurus TCAD software. The model considers a device width of H = 5 µm and illumination based on the AM1.5d solar spectrum (1 sun = 1000 W/m²). The results demonstrate that the vertical structure can maintain higher efficiency and improved stability under elevated solar concentration levels.
References
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