First Experimental Evidence of Amorphous Tin Oxide Formation in Lead-Free Perovskites by Spectroscopic Ellipsometry
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INVESTIGACIONMetadades
Títol
First Experimental Evidence of Amorphous Tin Oxide Formation in Lead-Free Perovskites by Spectroscopic EllipsometryAutoria
Data de publicació
2023Editor
WileyISSN
2367-198XCita bibliogràfica
MANNINO, Giovanni, et al. First Experimental Evidence of Amorphous Tin Oxide Formation in Lead‐free Perovskites by Spectroscopic Ellipsometry. Solar RRL, 2023.Tipus de document
info:eu-repo/semantics/articleVersió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
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. [-]
Publicat a
Solar RRL, 2023.Entitat finançadora
Italian Ministry of Ecological Transition | ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development | European Comission
Codi del projecte o subvenció
21A03302 GU n.133 del 5-6-2021 | CUP B82C21001820001 | info:eu-repo/grantAgreement/EC/H2020/862656
Drets d'accés
info:eu-repo/semantics/openAccess
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