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Extending the Compositional Space of Mixed Lead Halide Perovskites by Cs, Rb, K, and Na Doping
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.ORCID iD: 0000-0002-4317-2879
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
Univ Cambridge, Dept Chem, Lensfield Rd, Cambridge CB2 1EW, England.
Univ Cambridge, Dept Phys, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England.
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2018 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 122, no 25, p. 13548-13557Article in journal (Refereed) Published
Abstract [en]

A trend in high performing lead halide perovskite solar cell devices has been increasing compositional complexity by successively introducing more elements, dopants, and additives into the structure; and some of the latest top efficiencies have been achieved with a quadruple cation mixed halide perovskite Cs(x)FA(y)MA(z)Rb(1-x-y-z)PbBr(q)I(3-9). This paper continues this trend by exploring doping of mixed lead halide perovskites, FA(0.83)MA(0.17)PbBr(0.51)I(2.49), with an extended set of alkali cations, i.e., Cs+, Rb+, K+, and Na+, as well as combinations of them. The doped perovskites were investigated with X-ray diffraction, energy-dispersive X-ray spectroscopy, scanning electron microscopy, hard X-ray photoelectron spectroscopy, UV-vis, steady state fluorescence, and ultrafast transient absorption spectroscopy. Solar cell devices were made as well. Cs+ can replace the organic cations in the perovskite structure, but Rb+, K+, and Na+ do not appear to do that. Despite this, samples doped with K and Na have substantially longer fluorescence lifetimes, which potentially could be beneficial for device performance.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2018. Vol. 122, no 25, p. 13548-13557
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Physical Chemistry Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-361115DOI: 10.1021/acs.jpcc.7b12464ISI: 000437811500039OAI: oai:DiVA.org:uu-361115DiVA, id: diva2:1250048
Funder
Swedish Energy Agency, P43294-1Swedish Foundation for Strategic Research , RMA15-0130Available from: 2018-09-21 Created: 2018-09-21 Last updated: 2019-02-18Bibliographically approved

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Jacobsson, JesperSvanström, SebastianPhilippe, BertrandRensmo, HåkanBoschloo, Gerrit

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