Enhanced photoluminescence and reduced dimensionality via vacancy ordering in a 10H halide perovskite

Hang Liu, Hassan Hafeez, David B. Cordes, Alexandra M. Z. Slawin, Gavin Peters, Steve Lee, Ifor D. W. Samuel, Finlay D. Morrison*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

Vacancy-ordered halide perovskites have received great interest in optoelectronic applications. In this work, we report the novel inorganic halide Cs10MnSb6Cl30 with a distinctive 10H (10-layer hexagonal) perovskite polytype structure with (hcccc)2 stacking. Cs10MnSb6Cl30 has 30% B-site vacancies ordered at both corner- and face-sharing sites, resulting in [MnSb6Cl30]10–n columns, i.e., a reduction of octahedral connectivity to 1D. This results in enhanced photoluminescence in comparison to the previously reported 25% vacancy-ordered 3C polytype Cs4MnSb2Cl12 with 2D connectivity. This demonstrates not only the existence of the 10H perovskite structure in halides but also demonstrates the degree of B-site deficiency and stacking sequence variation as a direction to tune the optical properties of perovskite polytypes via vacancy rearrangements.
Original languageEnglish
Pages (from-to)3629-3636
Number of pages8
JournalInorganic Chemistry
Volume62
Issue number8
Early online date13 Feb 2023
DOIs
Publication statusPublished - 27 Feb 2023

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