A proof‐of‐concept tandem solar cell using Sb₂S₃ and Sb₂Se₃ as top and bottom cell absorber materials is demonstrated. The bandgaps of Sb₂S₃ and Sb₂Se₃ are 1.74 and 1.22 eV, perfectly satisfying the requirement of tandem solar cells. The application of few‐layer graphene enables high transmittance and excellent interfacial contact in the top subcell. By controlling the thickness of the top cell for maximizing the spectral application, the tandem device delivers a power conversion efficiency of 7.93%, which outperforms the individually optimized top cell (5.58%) and bottom cell (6.50%). Mechanistical investigation shows that the tandem device is able to make up voltage loss in the subcells, which is a critical concern in the current antimony chalcogenide solar cells. This study provides an alternative approach to enhancing the energy conversion efficiency of antimony selenosulfide.

中文翻译：

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所有锑硫族化物串联太阳能电池

演示了使用Sb ₂ S ₃和Sb ₂ Se ₃作为顶部和底部电池吸收材料的概念验证串联太阳能电池。Sb ₂ S ₃和Sb ₂ Se ₃的带隙分别为1.74和1.22 eV，完全满足了串联太阳能电池的要求。多层石墨烯的应用可以在顶部子电池中实现高透射率和出色的界面接触。通过控制顶部电池的厚度以最大化频谱应用，串联设备可提供7.93％的功率转换效率，优于单独优化的顶部电池（5.58％）和底部电池（6.50％）。机械研究表明，串联装置能够弥补子电池中的电压损失，这是当前锑硫族化物太阳能电池中的关键问题。这项研究提供了另一种方法来增强硒硫化锑的能量转换效率。