Organic–inorganic hybrid perovskite materials are excellent candidates as light absorbers in tandem solar cells with advantages of tunable bandgaps, high absorption coefficients, facile fabrication processes, and low costs. Tandem devices offer a route to further improve the efficiency and reduce the cost for the solar cell practical applications. One critical challenge that limits the development of two‐terminal perovskite‐based tandem devices is the interconnection between two subcells. To achieve efficient interconnection in the tandem devices, it is required to simultaneously fulfill the high electrical, optical, and chemical requirements. In particular, chemical protection requirement is necessary to enable a tandem device in the case of solution‐processed perovskite–perovskite tandem solar cells. In this work, recent advances of interconnection in perovskite‐based two‐terminal tandem solar cells are reviewed. A brief introduction to the topic is first given. The definition, functions, and requirements of interconnecting layers in two‐terminal tandem devices are then discussed. Next, the insights into recent advances of interconnecting layers in two‐terminal perovskite‐based tandem solar cells (perovskite–perovskite, perovskite–polymer, perovskite–inorganic tandem solar cells) are further described. Finally, an outlook of the future research directions and a brief summary are drawn.

中文翻译：

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钙钛矿串联太阳能电池中的高效互连

有机-无机杂化钙钛矿材料是可调节的带隙，高吸收系数，制造工艺简便且成本低廉的优点，是串联太阳能电池中光吸收剂的极佳选择。串联设备为进一步提高效率并降低太阳能电池实际应用的成本提供了一条途径。限制两个基于钙钛矿的串联设备发展的关键挑战是两个子电池之间的互连。为了在串联设备中实现有效的互连，需要同时满足较高的电气，光学和化学要求。特别地，在溶液加工钙钛矿-钙钛矿串联太阳能电池的情况下，化学保护要求对于使串联装置成为必需。在这项工作中 综述了钙钛矿基两末端串联太阳能电池在互连方面的最新进展。首先简要介绍该主题。然后讨论了两端串联设备中互连层的定义，功能和要求。接下来，将进一步介绍两层基于钙钛矿的串联太阳能电池（钙钛矿-钙钛矿，钙钛矿-聚合物，钙钛矿-无机串联太阳能电池）中互连层的最新进展。最后，对未来的研究方向进行了展望并作了简要总结。进一步描述了基于两末端钙钛矿的串联太阳能电池（钙钛矿-钙钛矿，钙钛矿-聚合物，钙钛矿-无机串联太阳能电池）中互连层的最新进展的见解。最后，对未来的研究方向进行了展望并作了简要总结。进一步描述了基于两末端钙钛矿的串联太阳能电池（钙钛矿-钙钛矿，钙钛矿-聚合物，钙钛矿-无机串联太阳能电池）中互连层的最新进展的见解。最后，对未来的研究方向进行了展望并作了简要总结。