Tailoring Buried Interface and Minimizing Energy Loss Enable Efficient Narrow and Wide Bandgap Inverted Perovskite Solar Cells by Aluminum Glycinate Based Organometallic Molecule

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Abstract
Rational regulation of Me‐4PACz/perovskite interface has emerged as a significant challenge in the pursuit of highly efficient and stable perovskite solar cells (PSCs). Herein, an organometallic molecule of aluminum glycinate (AG) that contained amine (‐NH2) and aluminum hydroxyl (Al‐OH) groups is developed to tailor the buried interface and minimize interface‐driven energy losses. The Al‐OH groups selectively bonded with unanchored O═P‐OH and bare NiO‐OH to optimize the surface morphology and energy levels, while the ‐NH2 group interacted specifically with Pb2+ to retard perovskite crystallization, passivate buried Pb‐related defects, and release residual interface stress. These interactions facilitate the interface carrier extraction and reduce interface‐driven energy losses, thereby realizing a balanced charge carrier transport. Consequently, AG‐modified narrow bandgap (1.55 eV) PSC demonstrates an efficiency of 26.74% (certified 26.21%) with a fill factor of 86.65%; AG‐modified wide bandgap (1.785 eV) PSC realizes 20.71% champion efficiency with excellent repeatability. These PSCs maintain 91.37%, 91.92%, and 92.00% of their initial efficiency after aging in air atmosphere, the nitrogen‐filled atmosphere at 85 °C, and continuously tracking at the maximum power‐point under one‐sun illumination (100 mW cm−2) for 1200 h, respectively.
Funding Information
  • National Key Research and Development Program of China (2022YFB4200500)
  • National Natural Science Foundation of China (62204148, 22379101, 22379101)

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