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Hydrophobically capped nanocrystals of formamidinium lead bromide (FAPbBr3) perovskite (PNC) show bright and stable fluorescence in solution and thin‐film states. When compared with isolated PNCs in a solution, close‐packed PNCs in a thin film show extended fluorescence lifetime (ca. 4.2 μs), which is due to hopping or migration of photogenerated excitons among PNCs. Both fluorescence quantum efficiency...
Fluoreszenzlöschung In der Zuschrift auf S. 1234 zeigen V. C. Nair, V. Biju et al., wie durch Dotieren eines dünnen Perowskitfilms mit C60‐Molekülen die Excitonenmigration gestoppt werden kann, wodurch die Fluoreszenz der Nanokristalle quantitativ gelöscht wird.
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