Double-side 2D/3D heterojunctions for inverted perovskite solar cells

• 成果类型: Article
• 署名作者: Azmi, Randi; Utomo, Drajad Satrio; Vishal, Badri; Zhumagali, Shynggys; Dally, Pia; Risqi, Andi Muhammad; Prasetio, Adi; Ugur, Esma; Cao, Fangfang; Imran, Imil Fadli; Said, Ahmed Ali; Pininti, Anil Reddy; Subbiah, Anand Selvin; Aydin, Erkan; Xiao, Chuanxiao; Seok, Sang Il; De Wolf, Stefaan
• 署名单位: King Abdullah University of Science & Technology; Ulsan National Institute of Science & Technology (UNIST); Chinese Academy of Sciences; Ningbo Institute of Materials Technology & Engineering, CAS
• 刊物名称: Nature
• ISSN/ISSBN: 0028-5291
• DOI: 10.1038/s41586-024-07189-3
• 发表日期: 2024-04-04
• 关键词: efficient; interfaces

摘要

Defects at the top and bottom interfaces of three-dimensional (3D) perovskite photoabsorbers diminish the performance and operational stability of perovskite solar cells owing to charge recombination, ion migration and electric-field inhomogeneities1-5. Here we demonstrate that long alkyl amine ligands can generate near-phase-pure 2D perovskites at the top and bottom 3D perovskite interfaces and effectively resolve these issues. At the rear-contact side, we find that the alkyl amine ligand strengthens the interactions with the substrate through acid-base reactions with the phosphonic acid group from the organic hole-transporting self-assembled monolayer molecule, thus regulating the 2D perovskite formation. With this, inverted perovskite solar cells with double-side 2D/3D heterojunctions achieved a power conversion efficiency of 25.6% (certified 25.0%), retaining 95% of their initial power conversion efficiency after 1,000 h of 1-sun illumination at 85 degrees C in air. A study presents a technique to sandwich 3D perovskite with 2D perovskites at the top and bottom, improving the performance and stability of perovskite solar cells.