Abstract:
Organic–inorganic hybrid perovskite materials have attracted significant attention due to their high absorption coefficient, low exciton binding energy, tunable bandgap, and long charge diffusion length, making them promising candidates for next-generation photovoltaics. However, non-radiative recombination and energy level mismatch remain critical barriers to device efficiency and stability.
This work employs lanthanide-based additive engineering to simultaneously improve perovskite crystal quality and interface properties. Sm3+ doping in the perovskite absorber enhances crystallinity and grain size, as confirmed by XRD and SEM, while photoluminescence analyses reveal suppressed non-radiative recombination and extended carrier lifetime. As a result, FAMAPbI3-based devices achieve a power conversion efficiency (PCE) of 24.94%. To further optimize interfacial charge transfer, Sm3+ is incorporated into the SnO2 electron transport layer, effectively passivating oxygen vacancy defects and improving energy level alignment with the perovskite layer. This reduces interfacial recombination and enhances electron extraction, leading to a PCE of 26.10%. These results demonstrate that lanthanide doping is an effective strategy for simultaneous crystal quality control and interface engineering, offering a viable pathway toward high-efficiency and stable perovskite solar cells.
Biography:
Dr. Abdul Sattar is a postdoctoral fellow specializing in hybrid perovskite based photovoltaic devices. He holds a PhD in Material Science and Engineering from University of Science and Technology Beijing. Dr. Abdul has worked with Academy for Advanced Interdisciplinary Science and Technology and has published extensively on perovskite crystal quality regulation and interface optimization of perovskite solar cells. He is currently the Senior Member of Material Science Sciety Pakistan and Member of Zhongguancun Talent Association, China
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