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, Peter
Wolff, Christian M.
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%. © 2023 American Association for the Advancement of Science. All rights reserved.
Publication Reference
Science, Volume 381, Issue 6653, Pages 59 - 63
Year
2023-07-01