Elusive Double Perovskite Iodides: Structural, Optical, and Magnetic Properties

Greggory T Kent; Emily Morgan; Kaitlin R Albanese; Anna Kallistova; Alexandra Brumberg; Linus Kautzsch; Guang Wu; Pratap Vishnoi; Ram Seshadri; Anthony K Cheetham

doi:10.1002/anie.202306000

Elusive Double Perovskite Iodides: Structural, Optical, and Magnetic Properties

Angew Chem Int Ed Engl. 2023 Aug 7;62(32):e202306000. doi: 10.1002/anie.202306000. Epub 2023 Jun 30.

Authors

Affiliations

¹ Materials Department and Materials Research Laboratory, University of California, Santa Barbara, CA 93106, USA.
² Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106, USA.
³ New Chemistry Unit and International Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bangalore, 560064, India.
⁴ Department of Materials Science & Engineering, National University of Singapore, 117576, Singapore, Singapore.

PMID: 37307520
DOI: 10.1002/anie.202306000

Abstract

Halide double perovskites [A₂ M^I M^III X₆ ] are an important class of materials that have garnered substantial interest as non-toxic alternatives to conventional lead iodide perovskites for optoelectronic applications. While numerous studies have examined chloride and bromide double perovskites, reports of iodide double perovskites are rare, and their definitive structural characterization has not been reported. Predictive models have aided us here in the synthesis and characterization of five iodide double perovskites of general formula Cs₂ NaLnI₆ (Ln=Ce, Nd, Gd, Tb, Dy). The complete crystal structures, structural phase transitions, optical, photoluminescent, and magnetic properties of these compounds are reported.

Keywords: Iodide; Lanthanides; Luminescence; Magnetism; Perovskite Phases.

Abstract

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