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首页> 美国卫生研究院文献>Scientific Reports >Band Gap Engineering of Multi-Junction Solar Cells: Effects of Series Resistances and Solar Concentration
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Band Gap Engineering of Multi-Junction Solar Cells: Effects of Series Resistances and Solar Concentration

机译：多结太阳能电池的带隙工程：串联电阻和太阳能集中度的影响

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Multi-junction (MJ) solar cells are one of the most promising technologies achieving high sunlight to electricity conversion efficiency. Resistive losses constitute one of the main underlying mechanisms limiting their efficiency under high illumination. In this paper, we study, by numerical modeling, the extent to which a fine-tuning of the different electronic gaps involved in MJ stacks may mitigate the detrimental effects of series resistance losses for concentration-dependent and independent series resistances. Our results demonstrate that appropriate bandgap engineering may lead to significantly higher conversion efficiency at illumination levels above ~1000 suns and series resistance values typically exceeding 0.02 Ω cm2, due to lower operating current and, in turn, series resistance losses. The implications for future generations of solar cells aiming at an improved conversion of the solar spectrum are also addressed.
机译：多结（MJ）太阳能电池是实现高阳光到电转换效率的最有前途的技术之一。电阻损耗是限制其在高照度下效率的主要潜在机制之一。在本文中，我们通过数值模型研究了微调MJ叠层中涉及的不同电子间隙可减轻串联电阻损耗对浓度相关和独立串联电阻的不利影响的程度。我们的结果表明，适当的带隙工程技术可能会导致在〜1000太阳以上的照明水平下转换效率显着提高，并且串联电阻值通常会超过0.02Ω·cm 2 ，这是因为工作电流较低，进而导致串联阻力损失。还解决了旨在改善太阳光谱转换对下一代太阳能电池的影响。

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