期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 136, 期 3, 页码 850-853出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja4109209
关键词
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资金
- Spanish Ministry of Economy and Competitiveness (MINECO) [CTQ2011-27758, MAT2011-24594]
- European Community [229036]
- Generalitat Valenciana [Prometeo/2012/053, ACOMP/2013/008]
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.
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