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

Shunde Li, Yun Xiao, Rui Su, Weidong Xu, Deying Luo (), Pengru Huang, Linjie Dai, Peng Chen, Pietro Caprioglio, Karim A. Elmestekawy, Milos Dubajic, Cullen Chosy, Juntao Hu, Irfan Habib, Akash Dasgupta, Dengyang Guo, Yorrick Boeije, Szymon J. Zelewski, Zhangyuchang Lu, Tianyu Huang, Qiuyang Li, Jingmin Wang, Haoming Yan, Hao-Hsin Chen, Chunsheng Li, Barnaby A. I. Lewis, Dengke Wang, Jiang Wu, Lichen Zhao, Bing Han (), Jianpu Wang, Laura M. Herz, James R. Durrant, Kostya S. Novoselov, Zheng-Hong Lu, Qihuang Gong (), Samuel D. Stranks (), Henry J. Snaith () and Rui Zhu ()
Additional contact information
Shunde Li: Peking University
Yun Xiao: University of Oxford
Rui Su: Peking University
Weidong Xu: University of Cambridge
Deying Luo: Beihang University
Pengru Huang: National University of Singapore
Linjie Dai: University of Cambridge
Peng Chen: Peking University
Pietro Caprioglio: University of Oxford
Karim A. Elmestekawy: University of Oxford
Milos Dubajic: University of Cambridge
Cullen Chosy: University of Cambridge
Juntao Hu: Yunnan University
Irfan Habib: University of Oxford
Akash Dasgupta: University of Oxford
Dengyang Guo: University of Cambridge
Yorrick Boeije: University of Cambridge
Szymon J. Zelewski: University of Cambridge
Zhangyuchang Lu: Peking University
Tianyu Huang: Peking University
Qiuyang Li: Peking University
Jingmin Wang: Nanjing Tech University (NanjingTech)
Haoming Yan: Peking University
Hao-Hsin Chen: Peking University
Chunsheng Li: Peking University
Barnaby A. I. Lewis: University of Cambridge
Dengke Wang: Yunnan University
Jiang Wu: Peking University
Lichen Zhao: Peking University
Bing Han: Eastern Institute of Technology
Jianpu Wang: Nanjing Tech University (NanjingTech)
Laura M. Herz: University of Oxford
James R. Durrant: Imperial College London
Kostya S. Novoselov: National University of Singapore
Zheng-Hong Lu: Yunnan University
Qihuang Gong: Peking University
Samuel D. Stranks: University of Cambridge
Henry J. Snaith: University of Oxford
Rui Zhu: Peking University

Nature, 2024, vol. 635, issue 8040, 874-881

Abstract: Abstract 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 × 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.

Date: 2024
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DOI: 10.1038/s41586-024-08159-5

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