Open AccessMonodisperse Formamidinium Lead Bromide Nanocrystals with Bright and Stable Green Photoluminescence
Author(s) -
Loredana Proteşescu,
Sergii Yakunin,
Maryna I. Bodnarchuk,
Federica Bertolotti,
Norberto Masciocchi,
Antonietta Guagliardi,
Maksym V. Kovalenko
Publication year - 2016
Publication title -
journal of the american chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.115
H-Index - 612
eISSN - 1520-5126
pISSN - 0002-7863
DOI - 10.1021/jacs.6b08900
Subject(s) - formamidinium , photoluminescence , nanocrystal , full width at half maximum , chemistry , dispersity , lead selenide , quantum yield , perovskite (structure) , bromide , nanotechnology , optoelectronics , photochemistry , analytical chemistry (journal) , optics , materials science , crystallography , inorganic chemistry , organic chemistry , physics , fluorescence
Bright green emitters with adjustable photoluminescence (PL) maxima in the range of 530-535 nm and full-width at half-maxima (fwhm) of <25 nm are particularly desirable for applications in television displays and related technologies. Toward this goal, we have developed a facile synthesis of highly monodisperse, cubic-shaped formamidinium lead bromide nanocrystals (FAPbBr 3 NCs) with perovskite crystal structure, tunable PL in the range of 470-540 nm by adjusting the nanocrystal size (5-12 nm), high quantum yield (QY) of up to 85% and PL fwhm of <22 nm. High QYs are also retained in films of FAPbBr 3 NCs. In addition, these films exhibit low thresholds of 14 ± 2 μJ cm -2 for amplified spontaneous emission.
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