Long periodic ripple in a 2D hybrid halide perovskite structure using branched organic spacers

Simple item page
dc.citation.firstpage12139en_US
dc.citation.issueNumber44en_US
dc.citation.journalTitleChemical Scienceen_US
dc.citation.lastpage12148en_US
dc.citation.volumeNumber11en_US
dc.contributor.authorHoffman, Justin M.en_US
dc.contributor.authorMalliakas, Christos D.en_US
dc.contributor.authorSidhik, Sirajen_US
dc.contributor.authorHadar, Idoen_US
dc.contributor.authorMcClain, Rebeccaen_US
dc.contributor.authorMohite, Aditya D.en_US
dc.contributor.authorKanatzidis, Mercouri G.en_US
dc.date.accessioned2020-12-16T19:47:20Zen_US
dc.date.available2020-12-16T19:47:20Zen_US
dc.date.issued2020en_US
dc.description.abstractTwo-dimensional (2D) halide perovskites have great promise in optoelectronic devices because of their stability and optical tunability, but the subtle effects on the inorganic layer when modifying the organic spacer remain unclear. Here, we introduce two homologous series of Ruddlesden–Popper (RP) structures using the branched isobutylammonium (IBA) and isoamylammonium (IAA) cations with the general formula (RA)2(MA)n−1PbnI3n+1 (RA = IBA, IAA; MA = methylammonium n = 1–4). Surprisingly, the IAA n = 2 member results in the first modulated 2D perovskite structure with a ripple with a periodicity of 50.6 Å occurring in the inorganic slab diagonally to the [101] direction of the basic unit cell. This leads to an increase of Pb–I–Pb angles along the direction of the wave. Generally, both series show larger in-plane bond angles resulting from the additional bulkiness of the spacers compensating for the MA's small size. Larger bond angles have been shown to decrease the bandgap which is seen here with the bulkier IBA leading to both larger in-plane angles and lower bandgaps except for n = 2, in which the modulated structure has a lower bandgap because of its larger Pb–I–Pb angles. Photo-response was tested for the n = 4 compounds and confirmed, signaling their potential use in solar cell devices. We made films using an MACl additive which showed good crystallinity and preferred orientation according to grazing-incidence wide-angle scattering (GIWAXS). As exemplar, the two n = 4 samples were employed in devices with champion efficiencies of 8.22% and 7.32% for IBA and IAA, respectively.en_US
dc.identifier.citationHoffman, Justin M., Malliakas, Christos D., Sidhik, Siraj, et al.. "Long periodic ripple in a 2D hybrid halide perovskite structure using branched organic spacers." <i>Chemical Science,</i> 11, no. 44 (2020) Royal Society of Chemistry: 12139-12148. https://doi.org/10.1039/D0SC04144K.en_US
dc.identifier.digitald0sc04144ken_US
dc.identifier.doihttps://doi.org/10.1039/D0SC04144Ken_US
dc.identifier.urihttps://hdl.handle.net/1911/109735en_US
dc.language.isoengen_US
dc.publisherRoyal Society of Chemistryen_US
dc.rightsThis article is licensed under a Creative Commons Attribution 3.0 Unported Licence.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/en_US
dc.titleLong periodic ripple in a 2D hybrid halide perovskite structure using branched organic spacersen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
d0sc04144k.pdf
Size:
1.21 MB
Format:
Adobe Portable Document Format
Download
Collections
Faculty Publications
Chemical and Biomolecular Engineering Publications