Hypophosphite hybrid perovskites: a platform for unconventional tilts and shifts

Following the recent discovery of the [A]Mn(H 2 POO) 3 (H 2 POO − = hypophosphite) perovskite family, we report the A = [NH 2 (CH 3 ) 2 ] + (dimethylammonium, DMA) member. This phase shows an unusually large unit cell due to the position of the A-site cation within the perovskite cage windows rather...

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Published in:Chemical communications (Cambridge, England) England), 2018, Vol.54 (3), p.3751-3754
Main Authors: Wu, Yue, Binford, Trevor, Hill, Joshua A, Shaker, Sammy, Wang, John, Cheetham, Anthony K
Format: Article
Language:English
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Cations
Perovskites
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Summary:Following the recent discovery of the [A]Mn(H 2 POO) 3 (H 2 POO − = hypophosphite) perovskite family, we report the A = [NH 2 (CH 3 ) 2 ] + (dimethylammonium, DMA) member. This phase shows an unusually large unit cell due to the position of the A-site cation within the perovskite cage windows rather than the centre, as is the norm. We discuss the tendency of the hypophosphite perovskite skeleton to accommodate differently shaped A-site cations through the generation of unconventional tilts and columnar shifts, then enumerate these tilts and shifts for all known [A]Mn(H 2 POO) 3 phases. Following the recent discovery of the [A]Mn(H 2 POO) 3 perovskite family, we report the A = dimethylammonium member. We then enumerate the unusual octahedral tilting and shifting observed across this perovskite family.
ISSN:1359-7345
1364-548X
DOI:10.1039/c8cc00907d