Presentation Details
| Coring Technique Development and Failure Analysis of Perovskite Solar Modules (yes) Yujian Han1, 2, Xiting Lang2, Minghui Li2, Hao Tian2, Hong Lu5, Xirui Liu2, Xingxing Wang2, Lang Wen2, Jiang Sheng4, Jichun Ye2, Chongwen Li6, Chuanxiao Xiao2, 3. 1University of Science and Technology of China, Hefei, China.2Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China.3Ningbo New Materials Testing and Evaluation Center CO.Ltd, Ningbo, China.4ChangZhou S.C Exact Equipment Co, Changzhou, China.5University of Nottingham Ningbo China, Ningbo, China.6Southeast University, Nanjing, China |
Abstract
Perovskite solar cells (PSCs) have rapidly achieved power conversion efficiencies exceeding 27%, yet long-term operational stability remains the primary barrier to commercialization. Most stability studies focus on small-area devices under controlled laboratory conditions, leaving the degradation behavior of large-area perovskite solar modules (PSMs) under real outdoor operation poorly understood. Understanding these real-world degradation pathways is therefore critical for improving the durability of perovskite photovoltaics. However, accessing internal layers without introducing artifacts remains difficult. We present a controlled coring method tailored for PSMs that enables mechanical extraction of intact device sections while preserving their structural, chemical, and optoelectronic properties. Comprehensive characterizations confirm that the cored devices remain representative of the original module, with no detectable artifacts introduced during extraction. Applying this technique to field-aged modules operated outdoors for ten months reveals nonuniform photoluminescence, Ag oxidation, and AgI formation, which are clear evidence of moisture-driven Ag corrosion and ion migration at the perovskite/Ag interface. This work establishes a reliable approach for accessing encapsulated perovskite modules and provides direct insight into real-world degradation pathways, offering guidance for improving the durability of perovskite photovoltaic technologies.
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