Spontaneous formation of robust two-dimensional perovskite phases

• 成果类型: Article
• 署名作者: Tan, Shaun; Shih, Meng-Chen; Lu, Yongli; Choi, Seung-Gu; Dong, Yifan; Lee, Joo-Hong; Yavuz, Ilhan; Larson, Bryon W.; Park, So Yeon; Kodalle, Tim; Zhang, Ruiqi; Grotevent, Matthias J.; Lin, Yu-Kuan; Zhu, Hua; Bulovic, Vladimir; Sutter-Fella, Carolin M.; Park, Nam-Gyu; Beard, Matthew C.; Lee, Jin-Wook; Zhu, Kai; Bawendi, Moungi G.
• 署名单位: Sungkyunkwan University (SKKU); Sungkyunkwan University (SKKU); United States Department of Energy (DOE); National Renewable Energy Laboratory - USA; Marmara University; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; Massachusetts Institute of Technology (MIT); Sungkyunkwan University (SKKU); Sungkyunkwan University (SKKU)
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-11951
• DOI: 10.1126/science.adr1334
• 发表日期: 2025-05-08
• 页码: 639-645
• 关键词: solar-cells; spiro-ometad; lead iodide; efficient; migration; passivation; STABILITY; layer; photovoltaics; degradation

摘要

The two-dimensional on three-dimensional (2D/3D) perovskite bilayer heterostructure can improve the stability and performance of perovskite solar cells. We show that the 2D/3D perovskite stack in a device evolves dynamically during its end-of-life decomposition. Initially phase-pure 2D interlayers can evolve differently, resulting in different device stabilities. We show that a robust 2D interlayer can be formed using mixed solvents to regulate its crystallinity and phase purity. The resulting 2D/3D devices achieved 25.9% efficiency and had good durability, retaining 91% of their initial performance after 1074 hours at 85 degrees C using maximum power point tracking.