First Experimental Evidence of Amorphous Tin Oxide Formation in Lead-Free Perovskites by Spectroscopic Ellipsometry
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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INVESTIGACIONMetadata
Title
First Experimental Evidence of Amorphous Tin Oxide Formation in Lead-Free Perovskites by Spectroscopic EllipsometryAuthor (s)
Date
2023Publisher
WileyISSN
2367-198XBibliographic citation
MANNINO, Giovanni, et al. First Experimental Evidence of Amorphous Tin Oxide Formation in Lead‐free Perovskites by Spectroscopic Ellipsometry. Solar RRL, 2023.Type
info:eu-repo/semantics/articleVersion
info:eu-repo/semantics/publishedVersionAbstract
The most promising lead-free options for producing perovskite solar cells are tin halide perovskite materials. Herein, while in situ monitoring the optical evolution of the material in humid air, spectroscopic ellip ... [+]
The most promising lead-free options for producing perovskite solar cells are tin halide perovskite materials. Herein, while in situ monitoring the optical evolution of the material in humid air, spectroscopic ellipsometry is used to investigate the dielectric function of FASnI3 layers (with and without additives) within the range of 1–5 eV. According to calculations based on the density functional theory that shows oxygen diffusion on FASnI3 surfaces, the steady decrease in absorption coefficient in the band gap region (1.47 eV) and simultaneous increase in absorption in the 3–4.5 eV region suggest the production of amorphous tin oxide. Concurrently, X-ray diffraction reveals a clear degradation of FASnI3. With the addition of sodium borohydride and dipropylammonium iodide, the optically active area of about 1.47 eV is preserved for a longer period while SnO2 production is prevented. Last but not least, FASnI3's stability is investigated in dry N2 environment and shown that it is optically durable for thermal operations up to 100 °C, particularly when additives are used. [-]
Is part of
Solar RRL, 2023.Funder Name
Italian Ministry of Ecological Transition | ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development | European Comission
Project code
21A03302 GU n.133 del 5-6-2021 | CUP B82C21001820001 | info:eu-repo/grantAgreement/EC/H2020/862656
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info:eu-repo/semantics/openAccess
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- INAM_Articles [521]
- FCA_Articles [511]