Interface passivation for 31.25%-efficient perovskite/silicon tandem solar cells

• 成果类型: Article
• 署名作者: Chin, Xin Yu; Turkay, Deniz; Steele, Julian A.; Tabean, Saba; Eswara, Santhana; Mensi, Mounir; Fiala, Peter; Wolff, Christian M.; Paracchino, Adriana; Artuk, Kerem; Jacobs, Daniel; Guesnay, Quentin; Sahli, Florent; Andreatta, Gaelle; Boccard, Mathieu; Jeangros, Quentin; Ballif, Christophe
• 署名单位: Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; Swiss Center for Electronics & Microtechnology (CSEM); KU Leuven; University of Queensland; University of Queensland; Luxembourg Institute of Science & Technology; University of Luxembourg; Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-9458
• DOI: 10.1126/science.adg0091
• 发表日期: 2023-07-07
• 页码: 59-62
• 关键词: Efficiency; silicon; micrometer

摘要

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 (C-60)]. We demonstrate a device with an active area of 1.17 square centimeters, reaching a certified power conversion efficiency of 31.25%.