Lee, Seri Yoon, Seongwon Jin, Ahyeon Lee, Yun-Woo Kim, Kyeongmin Chung, Yoon Jang Baek, Se-woong Choi, Deokjae Jang, Yoon Hee Son, Hae Jung 2026-02-19T04:30:47Z 2026-02-19T04:30:47Z 2026-02-19 2026-01 https://pubs.kist.re.kr/handle/201004/154278 This review provides a comprehensive understanding of the critical role of interface engineering in enhancing the efficiency and stability of mixed Sn–Pb perovskite solar cells (PSCs). We primarily focus on the p–i–n architecture, systematically addressing the fundamental challenges and recent strategic breakthroughs at both the top exposed perovskite surface and the bottom buried interface. By detailing how surface engineering approaches mitigate interfacial defects and optimize charge-carrier dynamics, this review emphasizes the direct correlation between precise interface control and the rapid performance enhancement in narrow-bandgap single-junction devices. Furthermore, we extend this discussion to the interconnecting layers in all-perovskite tandem solar cells, where interfacial optimization is crucial for achieving effective charge transport. Ultimately, this review offers strategic perspectives on overcoming current interfacial hurdles to facilitate the transition of Sn–Pb PSC technology from laboratory-scale research to large-scale industrial applications. English WILEY-V C H VERLAG GMBH Advances in Interfacial Engineering for Stable and Efficient Sn–Pb Perovskite Solar Cells Article 10.1002/solr.202500959 1 Solar RRL, v.10, no.2 Solar RRL 10 2 N scie 001674846600003 2-s2.0-105028367894 Energy & Fuels Materials Science, Multidisciplinary Energy & Fuels Materials Science Review HALIDE PEROVSKITES THEORETICAL-ANALYSIS LEAD PASSIVATION PERFORMANCE OXIDATION CRYSTALLIZATION HETEROJUNCTION FABRICATION STABILITY all-perovskite tandem solar cells buried interface interconnecting layer interfacial engineering narrow-bandgap perovskite solar cells Sn-Pb perovskite Sn-Pb perovskite/ETL interface