Enhanced photoluminescence and reduced dimensionality via vacancy ordering in a 10H halide perovskite
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.
Citation
Liu , H , Hafeez , H , Cordes , D B , Slawin , A M Z , Peters , G , Lee , S , Samuel , I D W & Morrison , F D 2023 , ' Enhanced photoluminescence and reduced dimensionality via vacancy ordering in a 10H halide perovskite ' , Inorganic Chemistry , vol. 62 , no. 8 , pp. 3629-3636 . https://doi.org/10.1021/acs.inorgchem.2c04433
Publication
Inorganic Chemistry
Status
Peer reviewed
ISSN
0020-1669Type
Journal article
Description
Funding: H.L. would like to thank the University of St. Andrews for financial support via a St. Leonard’s scholarship. The authors acknowledge facilities access made possible through support from the EPSRC Light Element Analysis facility Grant EP/T019298/1 and the EPSRC Strategic Equipment Resource Grant EP/R023751/1.Collections
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