All-perovskite tandem solar cell based on tin-lead perovskite achieves 27.8% efficiency

Scientists in the United States have fabricated an all-perovskite tandem solar cell that reportedly shows reduced interfacial energy loss in the cell's top device. It was built with a hole transport layer based on a compound known as P3CT that was doped with lead iodide. A group of researchers led by the University of Toledo in the United States have fabricated an all-perovskite tandem solar cell with a wide-band-gap top cell based on tin-lead (Pb-Sn) perovskite and a low-band-gap bottom cell relying on a conventional perovskite substrate. "The technology readiness level (TRL) of the tandem device ...

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