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- W4387078117 abstract "We report the colloidal synthesis of Bi-doped Cs2AgxNa1–xInCl6 double perovskite nanoplatelets (NPLs) exhibiting a near-unity photoluminescence quantum yield (PLQY), a record emission efficiency for nanoscale lead-free metal halides. A combination of optical spectroscopies revealed that nonradiative decay processes in the NPL were suppressed, indicating a well-passivated surface. By comparison, nanocubes with the same composition and surface ligands as the NPLs had a PLQY of only 40%. According to our calculations, the type of trap states arising from the presence of surface defects depends on their specific location: defects located on the facets of nanocubes generate only shallow traps, while those at the edges result in deep traps. In NPLs, due to their extended basal facets, most of the surface defects are facet defects. This so-called facet-defect tolerant behavior of double perovskites explains the more efficient optical emission of NPLs compared to that of nanocubes." @default.
- W4387078117 created "2023-09-28" @default.
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- W4387078117 date "2023-09-27" @default.
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- W4387078117 title "Facet-Defect Tolerant Bi-Doped Cs<sub>2</sub>Ag<sub><i>x</i></sub>Na<sub>1–<i>x</i></sub>InCl<sub>6</sub> Nanoplatelets with a Near-Unity Photoluminescence Quantum Yield" @default.
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- W4387078117 doi "https://doi.org/10.1021/acs.nanolett.3c02830" @default.
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