具有平面和朗伯分光器的双端钙钛矿/硅叠层太阳电池的细致平衡效率极限
Detailed-balance efficiency limits of two-terminal perovskite/silicon tandem solar cells with planar and Lambertian spectral splitters
摘要：
我们推导出具有钙钛矿顶部电池和具有嵌入式光谱分离器的硅底部电池的双端串联太阳能电池的光伏转换效率极限。对于大带隙顶电池，光谱分离器由于增强的光吸收和捕获而强烈地增强了效率。一个朗伯光谱分离器显示出显着改善的效果相比，平面分离器：我们发现一个理想的效率提高的热力学极限为500纳米厚的顶电池的6%绝对带隙高于1.75 eV。反之亦然，光谱分离器几何结构的使用使得能够使用更薄的顶部单元。使用钙钛矿电池的实验参数，我们表明，对于1.77 eV的顶电池带隙，可以获得2.8%的绝对效率。这项工作中的计算表明，将光谱分离器集成到顶部带隙高于1.7 eV的钙钛矿/硅串联电池中可以导致效率的大幅提高，即使光谱分离器具有现实的实验损耗和非统一反射。
英文摘要：
We derive the photovoltaic conversion efficiency limit for two-terminal tandem solar cells with a perovskite top cell and silicon bottom cell with an embedded spectrum splitter. For large-bandgap top-cells a spectrum splitter strongly enhances the efficiency because of enhanced light absorption and trapping. A Lambertian spectral splitter shows a significantly improved effect compared to a planar splitter: we find an ideal efficiency enhancement in the thermodynamic limit for a 500 nm thick top cell of 6% absolute for bandgaps above 1.75 eV. Vice versa, the use of a spectral splitter geometry enables the use of a thinner top cell. Using experimental parameters for perovskite cells we show that for a top-cell bandgap of 1.77 eV a 2.8% absolute efficiency can be gained. The calculations in this work show that integration of a spectral splitter into perovskite/silicon tandem cells with a top bandgap above 1.7 eV can lead to a large increase in efficiency, even with realistic experimental losses and non-unity reflection of the spectral splitter.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
