Nontemplate Synthesis of CH3NH3PbBr3 Perovskite Nanoparticles

LUCIANA C. SCHMIDT; ANTONIO PERTEGÁS; SORANYEL GONZÁLEZ-CARRERO ; OLGA MALINKIEWICZ; SAID AGOURAM; GUILLERMO MÍNGUEZ ESPALLARGAS; HENK J. BOLINK; RAQUEL E. GALIÁN; JULIA PÉREZ-PRIETO

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

AMER CHEMICAL SOC

Lugar: Washington; Año: 2014 vol. 136 p. 850 - 853

0002-7863

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.