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• W2891454550 abstract "Trap states at the interface or in bulk perovskite materials critically influence perovskite solar cells performance and long-term stability. Here, a strategy for efficiently passivating charge traps and mitigating interfacial recombination by SnO2 surface sulfur functionalization is reported, which utilizes xanthate decomposition on the SnO2 surface at low temperature. The results show that functionalized sulfur atoms can coordinate with under-coordinated Pb2+ ions near the interface. After device fabrication under more than 60 % humidity in ambient air, the efficiency of methylammonium lead iodide (MAPbI3) perovskite solar cells based on sulfur-functionalized SnO2 increased from 16.56 % to 18.41 % with suppressed hysteresis, which resulted from the accelerated interfacial charge transport kinetics and decreased traps in bulk perovskite by interfacial sulfur functionalization. Additionally, thermally stimulated current studies show the decreased trap density in the shallow trap area after interfacial sulfur functionalization. The interfacial sulfur functionalized solar cells without sealing also exhibited considerable retardation of solar cell degradation with only 10 % degradation after 70 days air storage. This work demonstrates a facile sulfur functionalization strategy by using xanthate decomposition on SnO2 surfaces to obtain highly efficient perovskite solar cells." @default.
• W2891454550 created "2018-09-27" @default.
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• W2891454550 date "2018-11-02" @default.
• W2891454550 modified "2023-10-04" @default.
• W2891454550 title "Interfacial Sulfur Functionalization Anchoring SnO ₂ and CH ₃ NH ₃ PbI ₃ for Enhanced Stability and Trap Passivation in Perovskite Solar Cells" @default.
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• W2891454550 doi "https://doi.org/10.1002/cssc.201801888" @default.
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