Room temperature vacuum-deposition of CsPbI2Br perovskite films from multiple-sources and mixed halide precursors
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Room temperature vacuum-deposition of CsPbI2Br perovskite films from multiple-sources and mixed halide precursors

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Room temperature vacuum-deposition of CsPbI2Br perovskite films from multiple-sources and mixed halide precursors

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dc.contributor.author Igual-Muñoz, Ana M.
dc.contributor.author Navarro-Alapont, Javier
dc.contributor.author Dreessen, Chris
dc.contributor.author Palazón Huet, Francisco
dc.contributor.author Sessolo, Michele
dc.contributor.author Bolink, Henk
dc.date.accessioned 2020-11-06T15:49:59Z
dc.date.available 2020-11-06T15:49:59Z
dc.date.issued 2020
dc.identifier.uri https://hdl.handle.net/10550/76276
dc.description.abstract Fully inorganic cesium lead halide perovskites, such as CsPbI2Br, show enhanced thermal stability compared to hybrid ones and are being widely investigated as wide bandgap absorbers for tandem applications. Despite their simple stoichiometry, the preparation of highly crystalline and stable cesium lead halide thin films is not trivial. In general, high-efficiency solar cells based on solution-processed CsPbI2Br thin films are prepared by hightemperature annealing or the use of chemical additives. In this work, we use solvent-free synthesis to investigate the formation of CsPbI2Br in bulk or in thin films via mechanochemical synthesis and multiple-source vacuum deposition, respectively. We demonstrate the importance of fostering halide alloying in the vacuum processing of inorganic lead halide perovskites, which can be attained either by using mixed halide precursors or by increasing the number of precursors (and hence deposition sources). These strategies lead to highly oriented perovskite films even at room temperature, with improved optoelectronic properties. We obtained promising power conversion efficiencies of 8.3% for solar cells employing asdeposited perovskites (without any annealing) and 10.0% for devices based on CsPbI2Br annealed at low temperatures (150 °C). This study allowed us to highlight the most promising processes and strategies to further optimize the material deposition as well as the solar cell architecture.
dc.language.iso eng
dc.relation.ispartof Chemistry of Materials, 2020, vol. 32, num. 19, p. 8641-8652
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Igual-Muñoz, Ana M. Navarro-Alapont, Javier Dreessen, Chris Palazón Huet, Francisco Sessolo, Michele Bolink, Henk 2020 Room temperature vacuum-deposition of CsPbI2Br perovskite films from multiple-sources and mixed halide precursors Chemistry of Materials 32 19 8641 8652
dc.subject Cèl·lules fotoelèctriques
dc.subject Materials
dc.title Room temperature vacuum-deposition of CsPbI2Br perovskite films from multiple-sources and mixed halide precursors
dc.type info:eu-repo/semantics/article
dc.date.updated 2020-11-06T15:49:59Z
dc.identifier.doi https://doi.org/10.1021/acs.chemmater.0c03038
dc.identifier.idgrec 141182

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