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

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Guo, Yuan-Yuan ; Yang, Lin-Jie ; Biberger, Simon ; McNulty, Jason A. ; Li, Teng ; Schötz, Konstantin ; Panzer, Fabian ; Lightfoot, Philip:
Structural Diversity in Layered Hybrid Perovskites, A₂PbBr₄ or AA′PbBr₄, Templated by Small Disc-Shaped Amines.
In: Inorganic Chemistry. Bd. 59 (2020) Heft 17 . - S. 12858-12866.
ISSN 1520-510X
DOI: https://doi.org/10.1021/acs.inorgchem.0c01807

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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.