Low-Cost Synthesis of Highly Luminescent Colloidal Lead Halide Perovskite Nanocrystals by Wet Ball Milling

Overview

Journal ACS Appl Nano Mater

Publisher American Chemical Society

Date 2018 Jun 19

PMID 29911683

Citations 26

Authors

Loredana Protesescu

Sergii Yakunin

Olga Nazarenko

Dmitry N Dirin

Maksym V Kovalenko

Affiliations

Soon will be listed here.

Abstract

Lead halide perovskites of APbX 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 and CsPbBr 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 (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) NCs.

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