The Role of SnF_2 Additive on Interface Formation in All Lead-Free FASnI_3 Perovskite Solar Cells

Julia Zillner; Hans-Gerd Boyen; Philip SchulzJonas HanischNicolas GauquelinJohan VerbeeckJohannes KueffnerDerese DestaLisa EiseleErik AhlswedeMichael Powalla

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The Role of SnF_2 Additive on Interface Formation in All Lead-Free FASnI_3 Perovskite Solar Cells

机译：The Role of SnF_2 Additive on Interface Formation in All Lead-Free FASnI_3 Perovskite Solar Cells

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Tin-based perovskites are promising alternative absorber materials for leadfreeperovskite solar cells but need strategies to avoid fast tin (Sn) oxidation.Generally, this reaction can be slowed down by the addition of tin fluoride(SnF_2) to the perovskite precursor solution, which also improves the perovskitelayer morphology. Here, this work analyzes the spatial distribution of theadditive within formamidinium tin triiodide (FASnI_3) films deposited on topof poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) holetransporting layers. Employing time-of-flight secondary ion mass spectrometryand a combination of hard and soft X-ray photoelectron spectroscopy,it is found that SnF_2 preferably accumulates at the PEDOT:PSS/perovskiteinterface, accompanied by the formation of an ultrathin SnS interlayer with aneffective thickness of ≈1.2 nm.

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《Advanced functional materials》 |2022年第28期|2109649.1-2109649.9|共9页
作者
Julia Zillner; Hans-Gerd Boyen; Philip SchulzJonas HanischNicolas GauquelinJohan VerbeeckJohannes KueffnerDerese DestaLisa EiseleErik AhlswedeMichael Powalla;
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Center for Solar Energy and Hydrogen Research Baden-WuerttembergMeitnerstrasse 1, 70563 Stuttgart, Germany;

Institute for Materials Research (IMO-IMOMEC)Hasselt UniversityWetenschapspark 1, 3590 Diepenbeek, Belgium;

Centre national de la recherche scientiqueInstitut Photovoltaique d'Ile de France18 Boulevard Thomas Gobert, 91120 Palaiseau, FranceElectron Microscopy for Materials Research (EMAT)University of AntwerpGroenenborgerlaan 171, 2020 Antwerp, Belgium;

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hard X-ray photoelectron spectroscopy; poly(3; 4-ethylenedioxythiophene): poly(styrenesulfonate); Sn-based perovskite solar cells; SnF_2 additives; SnS interlayer; time-of-flight secondary ion mass spectrometry;

The Role of SnF_2 Additive on Interface Formation in All Lead-Free FASnI_3 Perovskite Solar Cells

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