Metal halide perovskite-based solar cells have attracted considerable attention in recent years owing to their inexpensive and easy fabrication and rapidly increasing efficiencies, which already match those of the industrially dominant multi-crystalline silicon. The incorporation of perovskite absorber materials into multiple (multi-)junction cells could potentially allow us to go well beyond silicon-based technology and reach even higher power conversion efficiencies. Layering multiple solar-absorber junctions on top of each other enables the absorption of different regions of the solar spectrum, so that more energy can be extracted from sunlight. The possibility of tuning the bandgap of perovskite materials over a wide range, along with the ability to generate high open-circuit voltages from wide-bandgap absorbers, make perovskites ideal candidates. Perovskites can be used in combination with or as a substitute for silicon in photovoltaic technologies already in use and can be assembled in hybrid tandem architectures or layered in all-perovskite multi-junction cells. In this Review, we discuss opportunities for perovskite multi-junction cells, explore the progress made so far, describe the theoretical possibilities and discuss perspectives and challenges for the future of this emergent technology.

近年来，基于金属卤化物钙钛矿的太阳能电池因其价格便宜，易于制造且效率迅速提高而引起了相当大的关注，这已经与工业上占主导地位的多晶硅相匹配。将钙钛矿吸收剂材料结合到多个（多）结电池中可能使我们远远超越了基于硅的技术，并达到了更高的功率转换效率。将多个太阳能吸收器结点彼此叠置，可以吸收太阳光谱的不同区域，从而可以从阳光中提取更多的能量。钙钛矿材料的带隙可在宽范围内调节的可能性，以及能够从宽带隙吸收器产生高开路电压的能力，使钙钛矿成为理想的候选人。钙钛矿可以与已经使用的光伏技术中的硅组合使用或替代硅，并且可以以混合串联架构进行组装或分层放置在全钙钛矿多结电池中。在本综述中，我们讨论了钙钛矿多结电池的机会，探讨了迄今为止取得的进展，描述了理论可能性，并讨论了该新兴技术的未来前景和挑战。