Nontemplate synthesis of CH3NH3PbBr3 perovskite nanoparticles.
By Luciana C. Schmidt, Antonio Pertegás, Soranyel González‐Carrero, O. Malinkiewicz, S. Agouram, G. Mínguez Espallargas, Henk J. Bolink, R. Galian, J. Pérez‐Prieto. Journal of the American Chemical Society, 2014
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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.
Subfields: Electrical and Electronic Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/03b825fb7262e967cd13fff00e5b86feae0400af
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