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Published on: February 27, 2017
Compositional nanodomain formation in hybrid formate perovskites
Edwina A Donlan1, Hanna L B Boström, Harry S Geddes
1Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, UK. andrew.goodwin@chem.ox.ac.uk.
Abstract:
We report the synthesis and structural characterisation of three mixed-metal formate perovskite families [C(NH2)3]CuxM1-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.
