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Liquid water-induced growth of the 1D morphology of CH3NH3PbI3 hybrid perovskites

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Abstract

We observed an in situ decomposition–recrystallization process of CH3NH3PbI3 from cuboid (3D) to needle-shaped (1D) morphology induced by liquid water interactions. All the reversible processes from dry to increasing the relative humidity to water condensation and to dry again lasted for a few minutes and occurred at T = 1 °C. The water-induced crystallization process occurred slowly and at ambient conditions by dropping the solution on a substrate; subsequently, a very long monohydrate microwire having a 1D crystal structure was formed, which fully and quickly reversed to a 3D perovskite structure. The growth driving force in the droplet involved a meniscus moving from the outward direction to the inward direction in the droplet, which incorporated an 1D assembly of [PbI6]4− octahedra intercalated with (CH3NH3·H2O)+ cations.

Graphical abstract: Liquid water-induced growth of the 1D morphology of CH3NH3PbI3 hybrid perovskites

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Publication details

The article was received on 13 Aug 2019, accepted on 21 Oct 2019 and first published on 21 Oct 2019


Article type: Paper
DOI: 10.1039/C9CE01275C
CrystEngComm, 2019, Advance Article

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    Liquid water-induced growth of the 1D morphology of CH3NH3PbI3 hybrid perovskites

    A. Bonadio, L. S. de Oliveira, A. S. Polo and J. A. Souza, CrystEngComm, 2019, Advance Article , DOI: 10.1039/C9CE01275C

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