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- W4310954681 abstract "Minimizing surface defect is vital to further improve power conversion efficiency (PCE) and stability of inorganic perovskite solar cells (PSCs). Herein, we designed a passivator trifluoroacetamidine (TFA) to suppress CsPbI3-x Brx film defects. The amidine group of TFA can strongly chelate onto the perovskite surface to suppress the iodide vacancy, strengthened by additional hydrogen bonds. Moreover, three fluorine atoms allow strong intermolecular connection via intermolecular hydrogen bonds, thus constructing a robust shield against moisture. The TFA-treated PSCs exhibit remarkably suppressed recombination, yielding the record PCEs of 21.35 % and 17.21 % for 0.09 cm2 and 1.0 cm2 device areas, both of which are the highest for all-inorganic PSCs so far. The device also achieves a PCE of 39.78 % under indoor illumination, the highest for all-inorganic indoor photovoltaic devices. Furthermore, TFA greatly improves device ambient stability by preserving 93 % of the initial PCE after 960 h." @default.
- W4310954681 created "2022-12-21" @default.
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- W4310954681 date "2022-12-28" @default.
- W4310954681 modified "2023-10-18" @default.
- W4310954681 title "Fluorine‐Containing Passivation Layer via Surface Chelation for Inorganic Perovskite Solar Cells" @default.
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- W4310954681 doi "https://doi.org/10.1002/anie.202216634" @default.
- W4310954681 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36480237" @default.
- W4310954681 hasPublicationYear "2022" @default.
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