Substoichiometric Mixing of Metal Halide Powders and Their Single-Source Evaporation for Perovskite Photovoltaics

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dc.contributor.authorGuesnay, Quentin
dc.contributor.authorMcMonagle, Charles J.
dc.contributor.authorChernyshov, Dmitri
dc.contributor.authorZia, Waqas
dc.contributor.authorWieczorek, Alexander
dc.contributor.authorSiol, Sebastian
dc.contributor.authorSaliba, Michael
dc.contributor.authorBallif, Christophe
dc.contributor.authorWolff, Christian M.
dc.date.accessioned2024-08-22T12:25:11Z
dc.date.available2024-08-22T12:25:11Z
dc.date.issued2023-09-20
dc.description.abstractHigh-vacuum, single-source thermal evaporation is an appealing deposition process for perovskite photovoltaics. It promises the homogeneous and precisely controlled growth of very pure and homogeneous films on large areas in a conformal way. In this work, we study mechanically synthesized substoichiometric cesium bromide-lead iodide precursors, the single-source evaporation of the resulting mixes, subsequent deposited metal halide thin films, and converted perovskite thin films. Diffraction pattern analysis reveals the absence of new phases formed during ball-milling. Using synchrotron in situ grazing-incidence wide-angle X-ray scattering and energy-dispersive X-ray spectroscopy, we demonstrate that halide exchange between precursors occurs during the evaporation process. It is also found that a higher cesium bromide content results in films with more impurities. The proof-of-concept photovoltaic devices with the optimized cesium bromide content reach an efficiency of 15% for an optical bandgap of 1.7 eV. © 2023 American Chemical Society.
dc.identifier.citationACS Photonics Volume 10, Issue 9, Pages 3087 - 3094
dc.identifier.doi10.1021/acsphotonics.3c00438
dc.identifier.issn23304022
dc.identifier.urihttps://hdl.handle.net/20.500.12839/1474
dc.language.isoen
dc.titleSubstoichiometric Mixing of Metal Halide Powders and Their Single-Source Evaporation for Perovskite Photovoltaics
dc.typeJournal Article
dc.type.csemdivisionsBU-V
dc.type.csemresearchareasSolar Cells and Modules
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