title: Nontemplate synthesis of CH3NH3PbBr3 perovskite nanoparticles.
abstract: To date, there is no example in the literature of free, nanometer-sized, organolead halide CH3NH3PbBr3 perovskites. We report here the preparation of 6 nm-sized nanoparticles of this type by a simple and fast method based on the use of an ammonium bromide with a medium-sized chain that keeps the nanoparticles dispersed in a wide range of organic solvents. These nanoparticles can be maintained stable in the solid state as well as in concentrated solutions for more than three months, without requiring a mesoporous material. This makes it possible to prepare homogeneous thin films of these nanoparticles by spin-coating on a quartz substrate. Both the colloidal solution and the thin film emit light within a narrow bandwidth of the visible spectrum and with a high quantum yield (ca. 20%); this could be advantageous in the design of optoelectronic devices.
authors.affiliation: Instituto de Ciencia Molecular (ICMol), Universidad de Valencia , Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
authors.forename: Luciana C
authors.initials: LC
authors.lastname: Schmidt
authors.forename: Antonio
authors.initials: A
authors.lastname: Pertegás
authors.forename: Soranyel
authors.initials: S
authors.lastname: González-Carrero
authors.forename: Olga
authors.initials: O
authors.lastname: Malinkiewicz
authors.forename: Said
authors.initials: S
authors.lastname: Agouram
authors.forename: Guillermo
authors.initials: G
authors.lastname: Mínguez Espallargas
authors.forename: Henk J
authors.initials: HJ
authors.lastname: Bolink
authors.forename: Raquel E
authors.initials: RE
authors.lastname: Galian
authors.forename: Julia
authors.initials: J
authors.lastname: Pérez-Prieto