题目：Insight into ion-induced stability degradation in all-perovskite tandem photovoltaics: quantitative characterization and effective manipulation strategies
作者：Yining Bao1,2, Tianshu Ma1,2, Yuqi Zhang1,2, Luolei Shi1,2, Linling Qin1,2, Changlei Wang1,2, Guoyang Cao1,2,*, Xiaofeng Li1,2,*, and Zhenhai Yang1,2,*
单位：
1 School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
2 Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, China
Abstract: Ion-induced stability degradation is a critical factor limiting the power conversion efficiency and commercialization potential of perovskite-based solar cells. To mitigate ion migration in perovskite-based devices, various strategies, including defect passivation and ion optimization, have been extensively investigated from the device fabrication and integration perspectives, which, however, are often costly and may negatively impact device efficiency. Notably, all-perovskite tandem solar cells (TSCs), which exhibit more complex ion dynamics compared to single-junction devices, remain poorly understood. In this study, we employ comprehensive photoelectric coupling simulations in conjunction with a self-assembled light source compensation setup to elucidate ion dynamics in all-perovskite TSCs. Specifically, the hysteresis behavior at a defined scan rate is used to quantitatively characterize the extent of ion migration. Our findings reveal that enhanced ion migration occurs in current-limited sub-cells, whereas ion migration in higher-current sub-cells is attenuated due to differential voltage assignments. This study provides valuable insights into the device physics of ion migration in TSCs, facilitating effective control of ion behavior and offering essential guidance for the design of highly efficient and stable TSCs.
摘要：离子迁移诱导的稳定性衰减是限制钙钛矿太阳电池效率和商业化的关键因素。为减轻钙钛矿器件中的离子迁移，研究人员从器件制备和集成的角度提出了各种策略，包括缺陷钝化和离子优化。然而，这些策略通常成本高昂，并且可能对器件效率产生负面影响。值得注意的是，与单结器件相比，全钙钛矿串联太阳能电池表现出更复杂的离子动力学，但目前对相关机理缺乏深入理解。在这项研究中，我们将光电耦合仿真与自组装光源补偿测试相结合，以阐明全钙钛矿叠层电池中的离子动力学。具体而言，定义扫描速率下的迟滞行为用于定量表征离子迁移的程度。我们的研究结果表明，增强的离子迁移发生在电流较小的子电池中，而高电流子电池中的离子迁移由于电压分配差异而弱化。这项研究为全钙钛矿叠层电池中离子迁移的器件物理提供了见解，促进离子行为的有效控制，并为高效稳定的全钙钛矿叠层电池设计提供指导。
影响因子：18.8
链接：//doi.org/10.1016/j.scib.2025.04.005