Advances in Mixed Tin?Lead Narrow?Bandgap Perovskites for Single?Junction and All?Perovskite Tandem Solar Cells

This review summarizes the development of tin?lead perovskites and their applications in single?junction and all?perovskite tandem solar cells. The fundamental structural and optoelectronic properties of tin?lead perovskites and the recent advances with various approaches covering additives, solvents, interfaces, perovskite growth, and charge transport materials are discussed. The challenges and strategies for further development are also provided.Organic–inorganic metal?halide perovskites have received great attention for photovoltaic (PV) applications owing to their superior optoelectronic properties and the unprecedented performance development. For single?junction PV devices, although lead (Pb)?based perovskite solar cells have achieved 26.1% efficiency, the mixed tin?lead (Sn?Pb) perovskites offer more ideal bandgap tuning capability to enable an even higher performance. The Sn?Pb perovskite (with a bandgap tuned to ?1.2 eV) is also attractive as the bottom subcell for a tandem configuration to further surpass the Shockley–Queisser radiative limit for the single?junction devices. The performance of the all?perovskite tandem solar cells has gained rapid development and achieved a certified efficiency up to 29.1%. In this article, the properties and recent development of state?of?the?art mixed Sn?Pb perovskites and their application in single?junction and all?perovskite tandem solar cells are reviewed. Recent advances in various approaches covering additives, solvents, interfaces, and perovskite growth are highlighted. The authors also provide the perspective and outlook on the challenges and strategies for further development of mixed Sn?Pb perovskites in both efficiency and stability for PV applications.

» Publication Date: 05/06/2024

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This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 768737


                   




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