Interfacial Proton Precompensation: Suppressing Deprotonation‐Driven Lattice Collapse for Enhanced Efficiency and Stability in Perovskite Solar Cells

• DOI: 10.1002/ange.202417262
• Publication Date: 2024-11-12T03:05:20Z
• Authors: Bingying Xu; Guozhen Liu; Pengfei Wang; Wenzhe Li; Zhehan Ying; Jing Liu; Yantao Shi
• Keywords: Lattice (music)

Abstract The chemical property of the buried interface plays a crucial role in improving performance and stability perovskite solar cells (PSCs). SnO 2 /perovskite prepared from alkaline hydrogel with high proton affinity triggers directional migration irreversible reactions protons, exacerbating disintegration crystal. In this study, we proposed precompensation strategy to suppress deprotonation effect improve durability devices. By modulating environment surface energy state interface, domain‐limiting spontaneous compensation protons formamidinium (FA + ) under coulomb force were achieved, thereby stabilizing crystal structure. target films UV illumination heating at 85 °C was significantly enhanced. As result, devices can retain around 90 % their initial power conversion efficiency (PCE) after 1000 h continuous irradiation maximum point (MPP). Moreover, due reduction defect content improvement conductivity carrier mobility by treatment, interfacial loss non‐radiative recombination substantially diminished. PSC exhibited much higher PCE 25.55 than control (23.03 %).