Compositional nanodomain formation in hybrid formate perovskitesElectronic supplementary information (ESI) available: Experimental methods; powder diffraction refinement details; lattice parameters; semaphore diagram descriptions; IR spectra; NMF fits; equilibrium calculations and RMC refinement results. See DOI: 10.1039/c7cc06928f

We report the synthesis and structural characterisation of three mixed-metal formate perovskite families [C(NH 2 ) 3 ]Cu x M 1− x (HCOO) 3 (M = Mn, Zn, Mg). Using a combination of infrared spectroscopy, non-negative matrix factorization, and reverse Monte Carlo refinement, we show that the Mn- and Z...

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Main Authors: Donlan, Edwina A, Boström, Hanna L. B, Geddes, Harry S, Reynolds, Emily M, Goodwin, Andrew L
Format: Article
Language:English
Online Access:Get full text
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Summary:We report the synthesis and structural characterisation of three mixed-metal formate perovskite families [C(NH 2 ) 3 ]Cu x M 1− x (HCOO) 3 (M = Mn, Zn, Mg). Using a combination of infrared spectroscopy, non-negative matrix factorization, and reverse Monte Carlo refinement, we show that the Mn- and Zn-containing compounds support compositional nanodomains resembling the polar nanoregions of conventional relaxor ferroelectrics. The M = Mg family exhibits a miscibility gap that we suggest reflects the limiting behaviour of nanodomain formation. We discover compositional nanodomains in mixed-metal hybrid formate perovskites that are conceptually related to polar nanoregions in relaxor ferroelectrics.
ISSN:1359-7345
1364-548X
DOI:10.1039/c7cc06928f