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- W3044280598 abstract "Despite huge improvements in power conversion efficiencies of perovskite solar cells, the technology is still limited by fill factors at around 80%. Here, we report perovskite solar cells having exceptionally high fill factors of 85% and enhanced open-circuit voltage without sacrificing short-circuit current through a polymer-capped solvent-annealing process assisted by a hot air blower. During the solvent-annealing, the perovskite surface flattens and the perovskite grains agglomerate into micrometer-sized clusters having enlarged α-phase crystallites, while the δ-phase simultaneously disappears. The optimized structure reduces energetic disorder and trap-assisted recombination in the perovskite layer, resulting in an enhanced efficiency from 18.2% to 19.8% and improved device lifetime. Our results provide a pathway to increase the device efficiency and stability of perovskite solar cells, and have the potential to stimulate research on scalable poly-crystal perovskite layer fabrication in optoelectronic devices." @default.
- W3044280598 created "2020-07-29" @default.
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- W3044280598 date "2020-07-23" @default.
- W3044280598 modified "2023-10-16" @default.
- W3044280598 title "Perovskite Solar Cells with Enhanced Fill Factors Using Polymer-Capped Solvent Annealing" @default.
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- W3044280598 doi "https://doi.org/10.1021/acsaem.0c00854" @default.
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