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• W4378746625 startingPage "18106" @default.
• W4378746625 abstract "Inorganic-organic metal halide perovskite solar cells (PSCs) show power conversion efficiency values approaching those of state-of-the-art silicon solar cells. In a quest to find suitable charge transport materials in PSCs, hematite (α-Fe2O3) has emerged as a potential electron transport layer (ETL) in n-i-p planar PSCs due to its low cost, UV light stability, and nontoxicity. Yet, the performance of α-Fe2O3-based PSCs is far lower than that of state-of-the-art PSCs owing to the poor quality of the α-Fe2O3 ETL. In this work, solvent-assisted crystallization of α-Fe2O3 ETLs was carried out to examine the impact of solvents on the optoelectronic properties of α-Fe2O3 thin films. Among the various solvents used in this study (deionized water, ethanol, iso-propanol, and iso-butanol), optimized ethanol-based α-Fe2O3 ETLs lead to champion device performance with a power conversion efficiency of 13% with a reduced hysteresis index of 0.04 in an n-i-p-configured PSC. The PSC also exhibited superior long-term inert and ambient stabilities compared to a reference device made using a SnO2 ETL. Through a series of experiments spanning structural, morphological, and optoelectronic properties of the various α-Fe2O3 thin films and their devices, we provide insights into the reasons for the improved photovoltaic performance. It is noted that the formation of a pinhole-free compact morphology of ETLs facilitates crack-free surface coverage of the perovskite film atop an α-Fe2O3 ETL, reduces interfacial recombination, and enhances charge transfer efficiency. This work opens up the route toward novel ETLs for the development of efficient and photo-stable PSCs." @default.
• W4378746625 created "2023-05-31" @default.
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• W4378746625 date "2023-05-09" @default.
• W4378746625 modified "2023-10-16" @default.
• W4378746625 title "Solvent-Assisted Crystallization of an α-Fe₂O₃ Electron Transport Layer for Efficient and Stable Perovskite Solar Cells Featuring Negligible Hysteresis" @default.
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• W4378746625 doi "https://doi.org/10.1021/acsomega.3c01405" @default.
• W4378746625 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37251118" @default.
• W4378746625 hasPublicationYear "2023" @default.
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