Dual-interface engineering strategy for optimizing carrier dynamics in perovskite-silicon tandem solar cells = 钙钛矿-硅串联太阳能电池载流子动力学优化的双界面工程策略

This study demonstrates a dual-interface engineering approach for performance enhancement in perovskite-silicon tandem solar cells. By applying ethylenediamine dihydroiodide (EDAI₂) to simultaneously modify both top and bottom interfaces of wide-bandgap perovskite layers, we achieve synergistic defect suppression and charge transport optimization. Time-resolved photoluminescence characterization reveals extended carrier lifetimes and improved spatial homogeneity in dual-modified perovskite films. The optimized single-junction wide-bandgap (>1.66 eV) perovskite solar cells attain a champion efficiency of 22.75% with enhanced operational stability. Implemented in perovskite-silicon tandem configuration, the devices achieve over 31% power conversion efficiency, validating the effectiveness of organic ligand-mediated dual-interface engineering in regulating carrier dynamics and advancing perovskite-based tandem photovoltaics. (Figure presented.).

本研究展示了一种双界面工程策略来提高钙钛矿-硅串联太阳能电池的性能。利用二氢碘化乙二胺 (EDAI₂) 同时修饰宽带隙钙钛矿层的上下界面，实现了缺陷抑制和电荷输运的协同优化。时间分辨光致发光特性揭示了双界面修饰钙钛矿薄膜中载流子寿命的延长和空间均匀性的改善。优化后的单结宽带隙 (>1.66 eV) 钙钛矿太阳能电池效率达到22.75%，运行稳定性增强。在钙钛矿-硅串联结构中，叠层太阳能电池实现了超过31%的功率转换效率，验证了有机配体介导的双界面工程策略在调节载流子动力学和推进钙钛矿基叠层光伏方面的有效性。