Enhancing the chemical flexibility of hybrid perovskites by introducing divalent ligands

Lydia G Burley; James H Beecham-Lonsdale; Anant Kumar Srivastava; Ines E Collings; Paul J Saines

doi:10.1039/d1dt00878a

Enhancing the chemical flexibility of hybrid perovskites by introducing divalent ligands

Dalton Trans. 2021 Apr 28;50(16):5437-5441. doi: 10.1039/d1dt00878a.

Authors

Lydia G Burley¹, James H Beecham-Lonsdale¹, Anant Kumar Srivastava², Ines E Collings³, Paul J Saines¹

Affiliations

¹ School of Physical Sciences, University of Kent, Canterbury, Kent CT2 7NH, UK. P.Saines@kent.ac.uk.
² School of Physical Sciences, University of Kent, Canterbury, Kent CT2 7NH, UK. P.Saines@kent.ac.uk and Department of Materials Engineering, Indian Institute of Science (IISc), Bangalore-560012, Karnataka, India.
³ Centre for X-ray Analytics, Empa - Swiss Federal Laboratories for Materials Science and Technology, 8600, Dübendorf, Switzerland.

PMID: 33908998
DOI: 10.1039/d1dt00878a

Abstract

Herein we report the synthesis and structures of [(CH3)2NH2]Er(HCO2)2(C2O4) and [(NH2)3C]Er(HCO2)2(C2O4), in which the inclusion of divalent oxalate ligands allows for the exclusive incorporation of A+ and B3+ cations in an ABX3 hybrid perovskite structure for the first time. We rationalise the observed thermal expansion of these materials, including negative thermal expansion, and find evidence for weak antiferromagnetic coupling in [(CH3)2NH2]Er(HCO2)2(C2O4).