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Title: | The Role of SnF2 Additive on Interface Formation in All Lead-Free FASnI(3) Perovskite Solar Cells | Authors: | Zillner, Julia BOYEN, Hans-Gerd Schulz, Philip Hanisch, Jonas Gauquelin, Nicolas Kueffner, Johannes Verbeeck, Johan DESTA, Derese Eisele, Lisa Ahlswede, Erik Powalla, Michael |
Issue Date: | 2022 | Publisher: | WILEY-V C H VERLAG GMBH | Source: | ADVANCED FUNCTIONAL MATERIALS, (Art N° 2109649) | Status: | Early view | Abstract: | Tin-based perovskites are promising alternative absorber materials for leadfree perovskite solar cells but need strategies to avoid fast tin (Sn) oxidation. Generally, this reaction can be slowed down by the addition of tin fluoride (SnF2) to the perovskite precursor solution, which also improves the perovskite layer morphology. Here, this work analyzes the spatial distribution of the additive within formamidinium tin triiodide (FASnI(3)) films deposited on top of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hole transporting layers. Employing time-of-flight secondary ion mass spectrometry and a combination of hard and soft X-ray photoelectron spectroscopy, it is found that Sn F2 preferably accumulates at the PEDOT:PSS/perovskite interface, accompanied by the formation of an ultrathin SnS interlayer with an effective thickness of approximate to 1.2 nm. | Notes: | Zillner, J; Ahlswede, E (corresponding author), Ctr Solar Energy & Hydrogen Res Baden Wurttemberg, Meitnerstr 1, D-70563 Stuttgart, Germany.; Boyen, HG (corresponding author), Hasselt Univ, Inst Mat Res IMO IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. julia.zillner@zsw-bw.de; hansgerd.boyen@uhasselt.be; erik.ahlswede@zsw-bw.de |
Keywords: | hard X-ray photoelectron spectroscopy; poly(3,4-ethylenedioxythiophene):;poly(styrenesulfonate); Sn-based perovskite solar cells; SnF2 additives;;SnS interlayer; time-of-flight secondary ion mass spectrometry | Document URI: | http://hdl.handle.net/1942/37255 | ISSN: | 1616-301X | e-ISSN: | 1616-3028 | DOI: | 10.1002/adfm.202109649 | ISI #: | WOS:000779891000001 | Rights: | © 2022 Wiley-VCH GmbH | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2023 |
Appears in Collections: | Research publications |
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File | Description | Size | Format | |
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manuscript_author_version.pdf | Peer-reviewed author version | 1.94 MB | Adobe PDF | View/Open |
Adv Funct Materials - 2022 - Zillner - The Role of SnF2 Additive on Interface Formation in All Lead‐Free FASnI3 Perovskite.pdf Restricted Access | Published version | 2.4 MB | Adobe PDF | View/Open Request a copy |
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