First attempt to build perovskite-antimony selenide tandem solar cell delivers 20.58% efficiency

Scientists in China built for the first time a four-terminal tandem perovskite cell with a 17. 88%-efficient top perovskite device and a 7. 85%-efficient bottom antimony selenide bottom cell. The key features of the tandem cell are the transparent conducting electrode used to improve the spectral response of the top cell and the "double" electron transport layer of the antimony selenide cell. A group of researchers at the University of Science and Technology of China has fabricated a four-terminal (4T) tandem solar cell based on a top cell relying on a perovskite absorber and a bottom device using ...

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