title: N-Methylformamide as a Source of Methylammonium Ions in the Synthesis of Lead Halide Perovskite Nanocrystals and Bulk Crystals.
abstract: We report chemical routes for the synthesis of both nanocrystals and bulk crystals of methylammonium (MA) lead halide perovskites employingN-methylformamide (NMF) as a source of MA ions. Colloidal nanocrystals were prepared by a transamidation reaction between NMF and an alkyl amine (oleylamine). The nanocrystals showed photoluminescence quantum yields reaching 74% for MAPbBr3and 60% for MAPbI3. Bulk crystals were grown at room temperature, with no need for an antisolvent, by the acid hydrolysis of NMF. Important advantages of using NMF instead of MA salts are that the syntheses involve fewer steps and less toxic and less expensive chemicals.
authors.affiliation: Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy; Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy.
authors.forename: Javad
authors.initials: J
authors.lastname: Shamsi
authors.affiliation: Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy; Department of Chemistry, Faculty of Science, Mansoura University, Mansoura 35516, Egypt.
authors.forename: Ahmed L
authors.initials: AL
authors.lastname: Abdelhady
authors.affiliation: Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy; Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy.
authors.forename: Sara
authors.initials: S
authors.lastname: Accornero
authors.affiliation: Nanochemistry Department, Istituto Italiano di Tecnologia , Via Morego 30, 16163 Genova, Italy.
authors.forename: Milena
authors.initials: M
authors.lastname: Arciniegas
authors.affiliation: D3-PharmaChemistry Department, Istituto Italiano di Tecnologia , Via Morego 30, 16163 Genova, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Goldoni
authors.affiliation: Center for Nano Science and Technology @PoliMi, Istituto Italiano di Tecnologia , Via Giovanni Pascoli 70/3, 20133 Milano, Italy.
authors.forename: Ajay Ram Srimath
authors.initials: AR
authors.lastname: Kandada
authors.affiliation: Center for Nano Science and Technology @PoliMi, Istituto Italiano di Tecnologia , Via Giovanni Pascoli 70/3, 20133 Milano, Italy.
authors.forename: Annamaria
authors.initials: A
authors.lastname: Petrozza
authors.affiliation: Nanochemistry Department, Istituto Italiano di Tecnologia , Via Morego 30, 16163 Genova, Italy.
authors.forename: Liberato
authors.initials: L
authors.lastname: Manna