Interface passivation for 31.25%-efficient perovskite/silicon tandem solar cells
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Author
Chin, Xin Yu
Turkay, Deniz
Steele, Julian A
Tabean, Saba
Eswara, Santhana
Mensi, Mounir
Fiala
Wolff, Christian
Paracchino, Adriana
Artuk, Kerem
Abstract
Silicon solar cells are approaching their theoretical efficiency limit of 29%. This limitation can be
exceeded with advanced device architectures, where two or more solar cells are stacked to improve the
harvesting of solar energy. In this work, we devise a tandem device with a perovskite layer conformally
coated on a silicon bottom cell featuring micrometric pyramids—the industry standard—to improve its
photocurrent. Using an additive in the processing sequence, we regulate the perovskite crystallization
process and alleviate recombination losses occurring at the perovskite top surface interfacing the
electron-selective contact [buckminsterfullerene (C60)]. We demonstrate a device with an active area of
1.17 square centimeters, reaching a certified power conversion efficiency of 31.25%.
Publication Reference
Science, 381, 59
Year
2023-07-07