Suppressing Interfacial‐Accelerated Degradation in Perovskite Solar Cells via Supramolecular Co‐Assembly
Abstract
ABSTRACT Metal halide perovskites exhibit exceptional optoelectronic properties, but the perovskite/organic hole‐transport layer interface often accelerates device degradation under thermal and illumination stress. Single‐component interlayers are insufficient to prevent this coupled interfacial failure, leading to simultaneous destabilization of both the perovskite absorber and doped Spiro‐OMeTAD. Here, we report a carbazole‐derived supramolecular co‐assembly composed of ammonium‐functionalized (CzPACl) and flexible oligo(ethylene glycol) (CzOEG) monomers that simultaneously passivates the perovskite surface and stabilizes the adjacent Spiro‐OMeTAD layer. The resulting nanosheet interlayer suppresses non‐radiative recombination, mitigates ionic migration, and preserves the concentration of Spiro‐OMeTAD radical cations, enhancing interfacial wettability and mechanical compliance. Perovskite solar cells incorporating this co‐assembled layer achieve a power conversion efficiency (PCE) of 25.8% and retain over 90% of their initial efficiency after 1000 h of continuous illumination or over 80% after 1000 h of aging at 85°C. This work highlights supramolecular co‐assembly as a rational strategy to suppress coupled interfacial degradation pathways, providing a general approach for stabilizing perovskite optoelectronic devices.
Article Details
Authors (16)
Boyang Lu
School of Chemical Science and Technology Yunnan University Kunming Yunnan China
Xiaopeng Feng
Zhipeng Shao
Mingyuan Han
Beijing Key Laboratory of Novel Thin‐Film Solar Cells, School of New Energy North China Electric Power University Beijing China
Xiaofan Du
Qichao Meng
State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy Qingdao New Energy Shandong Laboratory Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao China
Yaliang Han
State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy Qingdao New Energy Shandong Laboratory Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao China
Rongxiu Liu
State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy Qingdao New Energy Shandong Laboratory Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao China
Ziqiang Su
Beijing Key Laboratory of Novel Thin‐Film Solar Cells, School of New Energy North China Electric Power University Beijing China
Bingqian Zhang
State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Qingdao New Energy Shandong Laboratory, Qingdao Institute of Bioenergy and Bioprocess Technology
Hao Wei
Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science
Zucheng Wu
Changcheng Cui
Shengren Xia
Fengzhi Jiang
School of Chemical Science and Technology Yunnan University Kunming Yunnan China
Guanglei Cui
Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology