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Aliovalent Doping of Lead Halide Perovskites: Exploring the CH3NH3PbI3-(CH3NH3)(3)Sb2I9 Nanocrystalline Phase Space

TitleAliovalent Doping of Lead Halide Perovskites: Exploring the CH3NH3PbI3-(CH3NH3)(3)Sb2I9 Nanocrystalline Phase Space
Publication TypeJournal Article
Year of Publication2018
AuthorsZhu, F, Gentry, NE, Men, L, White, MA, Vela, J
JournalJournal of Physical Chemistry C
Volume122
Pagination14082-14090
Date Published06
Type of ArticleArticle
ISBN Number1932-7447
Accession NumberWOS:000437811500096
Keywordsbr, chemistry, crystallization, inorganic colloidal nanocrystals, ligand-exchange, light-emitting-diodes, Materials Science, photoluminescence, photovoltaic applications, sensitized solar-cells, Technology - Other Topics, temperature, transformation
Abstract

Lead halide perovskites have attracted significant attention in the past few years due to their outstanding performance in photovoltaic devices. Nanoscale versions of these materials are also good candidates for light emitting devices. In this work, we synthesize perovskite nanocrystals using a surfactant-free method by introducing antimony iodide in the perovskite precursor. Surface-bound (CH3NH3)(3)Sb2I9 layers restrict the growth of CH3NH3PbI3, resulting in CH3NH3PbI3 nanocrystals of about 50 nm in size. Compared to the bulk perovskites, the nanocrystals show stronger photoluminescence. As there are no long-chain organic ligands on the surface that will inhibit the charge transport, these surfactant-free nanocrystals may have better performance in photoelectronic devices.

DOI10.1021/acs.jpcc.8b01191
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Alternate JournalJ. Phys. Chem. C