Highly emissive MAPbBr 3 perovskite QDs by ligand-assisted reprecipitation: the antisolvent effect.

Autor: Costa WC; Physics Department, Universidade Federal de Santa Catarina, Brazil., Salla CAM; Physics Department, Universidade Federal de Santa Catarina, Brazil., Ely F; Center for Information Technology Renato Archer-CTI, Brazil., Bechtold IH; Physics Department, Universidade Federal de Santa Catarina, Brazil.
Jazyk: angličtina
Zdroj: Nanotechnology [Nanotechnology] 2021 Dec 07; Vol. 33 (9). Date of Electronic Publication: 2021 Dec 07.
DOI: 10.1088/1361-6528/ac3bf1
Abstrakt: A systematic study of the synthetic procedure to improve quantum efficiency of luminescent hybrid perovskite QDs through ligand-assisted precipitation method is presented. Particularly, the influence of the dielectric constant and dipole moment of the antisolvent on the reaction time and the photophysical properties of the QDs is highlighted. After evaluating the influence of antisolvents and optimizing experimental parameters such as reaction time and Pb excess of the precursor, colloidal crystalline MAPbBr 3 QDs with exceptionally high absolute quantum yield up to 97.7% in solution and 69.1% in solid film were obtained. Finally, MAPbBr 3 QDs precipitated from anisole were processed like UV-curable nanocomposite as efficient down conversion layer resulting in very narrow green emission light-emitting diode.
(© 2021 IOP Publishing Ltd.)
Databáze: MEDLINE
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