Structural Diversity in Layered Hybrid Perovskites, A2PbBr4 or AA'PbBr4, Templated by Small Disc-Shaped Amines

Yuan-Yuan Guo; Lin-Jie Yang; Simon Biberger; Jason A McNulty; Teng Li; Konstantin Schötz; Fabian Panzer; Philip Lightfoot

doi:10.1021/acs.inorgchem.0c01807

Structural Diversity in Layered Hybrid Perovskites, A₂PbBr₄ or AA'PbBr₄, Templated by Small Disc-Shaped Amines

Inorg Chem. 2020 Sep 8;59(17):12858-12866. doi: 10.1021/acs.inorgchem.0c01807. Epub 2020 Aug 11.

Authors

Yuan-Yuan Guo¹, Lin-Jie Yang¹, Simon Biberger², Jason A McNulty¹, Teng Li¹, Konstantin Schötz², Fabian Panzer², Philip Lightfoot¹

Affiliations

¹ School of Chemistry and EaStChem, University of St. Andrews, St. Andrews KY16 9ST, United Kingdom.
² Soft Matter Optoelectronics, Department of Physics, University of Bayreuth, Bayreuth 95440, Germany.

PMID: 32805998
DOI: 10.1021/acs.inorgchem.0c01807

Abstract

We present three new hybrid layered lead(II) bromide perovskites of generic composition A₂PbBr₄ or AA'PbBr₄ that exhibit three distinct structure types. [TzH]₂PbBr₄ ([TzH⁺] = 1,2,4-triazolium) adopts a (001)-oriented layer structure and [AaH]₂PbBr₄, ([AaH⁺] = acetamidinium) adopts a (110)-oriented type, whereas [ImH][TzH]PbBr₄, ([ImH⁺] = imidazolium) adopts a rare (110)-oriented structure with enhanced corrugation (i.e., 3 × 3 type). The crystal structures of each are discussed in terms of the differing nature of the templating molecular species. Photoluminescent spectra for each are reported and the behaviors discussed in relation to the different structure of each composition.