Low-Cost Synthesis of Highly Luminescent Colloidal Lead Halide Perovskite Nanocrystals by Wet Ball Milling
Dirin, Dmitry N.
Kovalenko, Maksym V.
- Journal Article
Rechte / LizenzIn Copyright - Non-Commercial Use Permitted
Lead halide perovskites of APbX_3 type [A = Cs, formamidinium (FA), methylammonium; X = Br, I] in the form of ligand-capped colloidal nanocrystals (NCs) are widely studied as versatile photonic sources. FAPbBr_3 and CsPbBr_3 NCs have become promising as spectrally narrow green primary emitters in backlighting of liquid-crystal displays (peak at 520–530 nm, full width at half-maximum of 22–30 nm). Herein, we report that wet ball milling of bulk APbBr_3 (A = Cs, FA) mixed with solvents and capping ligands yields green luminescent colloidal NCs with a high overall reaction yield and optoelectronic quality on par with that of NCs of the same composition obtained by hot-injection method. We emphasize the superiority of oleylammonium bromide as a capping ligand used for this procedure over the standard oleic acid and oleylamine. We also show a mechanically induced anion-exchange reaction for the formation of orange-emissive CsPb(Br/I)_3 NCs Mehr anzeigen
Zeitschrift / SerieACS Applied Nano Materials
Seiten / Artikelnummer
VerlagAmerican Chemical Society (ACS)
ThemaBall milling; Lead halide perovskite; Mechanochemical synthesis; Nanocrystals; Photoluminescence
Organisationseinheit03934 - Kovalenko, Maksym / Kovalenko, Maksym
306733 - Chemically Engineered Nanocrystal Solids (EC)