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Issue 22, 2018
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Crystallization of CH3NH3PbI3−xBrx perovskite from micro-droplets of lead acetate precursor solution

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Abstract

The physical properties of organic–inorganic hybrid perovskite materials are greatly influenced by their composition, crystallinity, and morphology. Here, we investigate the growth of CH3NH3PbI3−xBrx perovskite from micro-droplets of a methylammonium iodide/lead acetate/dimethylformamide precursor solution added with different concentrations of PbBr2, which helps to control the morphology and crystallinity of the perovskite film. We find that both perovskite and its intermediate containing an acetate group growing from the micro-droplets. By adding some PbBr2, there is a tendency to form cubic perovskite crystals due to partial substitution of iodine with bromide. There is composition segregation when the crystals grow freely from the droplets. Smooth and uniform CH3NH3PbI3−xBrx perovskite films with a tunable band gap are thus fabricated from the precursor solution added with PbBr2.

Graphical abstract: Crystallization of CH3NH3PbI3−xBrx perovskite from micro-droplets of lead acetate precursor solution

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Publication details

The article was received on 14 Feb 2018, accepted on 20 Apr 2018 and first published on 20 Apr 2018


Article type: Paper
DOI: 10.1039/C8CE00253C
Citation: CrystEngComm, 2018,20, 3058-3065
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    Crystallization of CH3NH3PbI3−xBrx perovskite from micro-droplets of lead acetate precursor solution

    Y. Li, Z. Zhao, X. Cao, L. Zhi, F. Lin, L. Ci, X. Cui and J. Wei, CrystEngComm, 2018, 20, 3058
    DOI: 10.1039/C8CE00253C

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