Fluoride Chemistry in Tin Halide Perovskites

Pascual, Jorge; Flatken, Marion Alwine; Felix, Roberto; Li, Guixiang; Turren Cruz, Silver Hamill; Aldamasy, Mamoud Hussein; Hartmann, Claudia; Li, Meng; Di Girolamo, Diego; Nasti, Giuseppe; Hüsam, Elif; Wilks, Regan; Dallmann, Andre; Bär, Marcus; Hoell, Armin; Abate, Antonio

dc.contributor.author	Pascual, Jorge
dc.contributor.author	Flatken, Marion Alwine
dc.contributor.author	Felix, Roberto
dc.contributor.author	Li, Guixiang
dc.contributor.author	Turren Cruz, Silver Hamill
dc.contributor.author	Aldamasy, Mamoud Hussein
dc.contributor.author	Hartmann, Claudia
dc.contributor.author	Li, Meng
dc.contributor.author	Di Girolamo, Diego
dc.contributor.author	Nasti, Giuseppe
dc.contributor.author	Hüsam, Elif
dc.contributor.author	Wilks, Regan
dc.contributor.author	Dallmann, Andre
dc.contributor.author	Bär, Marcus
dc.contributor.author	Hoell, Armin
dc.contributor.author	Abate, Antonio
dc.date.accessioned	2021-10-19T12:08:30Z
dc.date.available	2021-10-19T12:08:30Z
dc.date.issued	2021-09-20
dc.identifier.citation	J. Pascual, M. Flatken, R. Félix, G. Li, S.-H. Turren-Cruz, M. H. Aldamasy, C. Hartmann, M. Li, D. Di Girolamo, G. Nasti, E. Hüsam, R. G. Wilks, A. Dallmann, M. Bär, A. Hoell, A. Abate, Angew. Chem. Int. Ed. 2021, 60, 21583.	ca_CA
dc.identifier.issn	0044-8249
dc.identifier.issn	1521-3757
dc.identifier.uri	http://hdl.handle.net/10234/195078
dc.description.abstract	Tin is the frontrunner for substituting toxic lead in perovskite solar cells. However, tin suffers the detrimental oxidation of SnII to SnIV. Most of reported strategies employ SnF2 in the perovskite precursor solution to prevent SnIV formation. Nevertheless, the working mechanism of this additive remains debated. To further elucidate it, we investigate the fluoride chemistry in tin halide perovskites by complementary analytical tools. NMR analysis of the precursor solution discloses a strong preferential affinity of fluoride anions for SnIV over SnII, selectively complexing it as SnF4. Hard X-ray photoelectron spectroscopy on films shows the lower tendency of SnF4 than SnI4 to get included in the perovskite structure, hence preventing the inclusion of SnIV in the film. Finally, small-angle X-ray scattering reveals the strong influence of fluoride on the colloidal chemistry of precursor dispersions, directly affecting perovskite crystallization.	ca_CA
dc.format.extent	9 p.	ca_CA
dc.format.mimetype	application/pdf	ca_CA
dc.language.iso	eng	ca_CA
dc.publisher	Wiley	ca_CA
dc.relation.isPartOf	Angewandte Chemie International Edition, 2021, vol. 60, no 39	ca_CA
dc.rights.uri	http://creativecommons.org/licenses/by-sa/4.0/	ca_CA
dc.subject	lead-free systems	ca_CA
dc.subject	perovskite solar cells	ca_CA
dc.subject	tin fluoride	ca_CA
dc.subject	tin halide perovskites	ca_CA
dc.subject	tin oxidation	ca_CA
dc.title	Fluoride Chemistry in Tin Halide Perovskites	ca_CA
dc.type	info:eu-repo/semantics/article	ca_CA
dc.identifier.doi	https://doi.org/10.1002/anie.202107599
dc.rights.accessRights	info:eu-repo/semantics/openAccess	ca_CA
dc.relation.publisherVersion	https://onlinelibrary.wiley.com/doi/full/10.1002/anie.202107599	ca_CA
dc.type.version	info:eu-repo/semantics/publishedVersion	ca_CA
project.funder.name	China Scholarship Council (CSC)	ca_CA
oaire.awardNumber	201906150131	ca_CA

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