Coherent growth of high-Miller-index facets enhances perovskite solar cells

• 成果类型: Article
• 署名作者: Li, Shunde; Xiao, Yun; Su, Rui; Xu, Weidong; Luo, Deying; Huang, Pengru; Dai, Linjie; Chen, Peng; Caprioglio, Pietro; Elmestekawy, Karim A.; Dubajic, Milos; Chosy, Cullen; Hu, Juntao; Habib, Irfan; Dasgupta, Akash; Guo, Dengyang; Boeije, Yorrick; Zelewski, Szymon J.; Lu, Zhangyuchang; Huang, Tianyu; Li, Qiuyang; Wang, Jingmin; Yan, Haoming; Chen, Hao-Hsin; Li, Chunsheng; Lewis, Barnaby A. I.; Wang, Dengke; Wu, Jiang; Zhao, Lichen; Han, Bing; Wang, Jianpu; Herz, Laura M.; Durrant, James R.; Novoselov, Kostya S.; Lu, Zheng-Hong; Gong, Qihuang; Stranks, Samuel D.; Snaith, Henry J.; Zhu, Rui
• 署名单位: Peking University; Peking University; Tsinghua University; Collaborative Innovation Center of Quantum Matter; University of Oxford; University of Cambridge; University of Cambridge; Beihang University; National University of Singapore; Institute for Functional Intelligent Materials (I-FIM); Yunnan University; Wroclaw University of Science & Technology; Nanjing Tech University; Nanjing Tech University; Peking University; Eastern Institute of Technology, Ningbo; Eastern Institute for Advanced Study; Changzhou University; Changzhou University; Imperial College London; Imperial College London; Swansea University; University of Toronto; Shanxi University
• 刊物名称: Nature
• ISSN/ISSBN: 0028-5770
• DOI: 10.1038/s41586-024-08159-5
• 发表日期: 2024-11-28
• 关键词: efficient; defects; surface

摘要

Obtaining micron-thick perovskite films of high quality is key to realizing efficient and stable positive (p)-intrinsic (i)-negative (n) perovskite solar cells1,2, but it remains a challenge. Here we report an effective method for producing high-quality, micron-thick formamidinium-based perovskite films by forming coherent grain boundaries, in which high-Miller-index-oriented grains grow on the low-Miller-index-oriented grains in a stabilized atmosphere. The resulting micron-thick perovskite films, with enhanced grain boundaries and grains, showed stable material properties and outstanding optoelectronic performances. The small-area solar cells achieved efficiencies of 26.1%. The 1-cm2 devices and 5 cm x 5 cm mini-modules delivered efficiencies of 24.3% and 21.4%, respectively. The devices processed in a stabilized atmosphere presented a high reproducibility across all four seasons. The encapsulated devices exhibited superior long-term stability under both light and thermal stressors in ambient air. High-quality micron-thick perovskite films with high-Miller-index-oriented grains can be used to achieve high-performance solar cells and modules.