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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.citation	A. M. Igual-Muñoz, J. Navarro-Alapont, C. Dreessen, F. Palazon, M. Sessolo, H. J. Bolink Room temperature vacuum-deposition of CsPbI2Br perovskite films from multiple-sources and mixed halide precursors Chem. Mater. 32, 19, 8641–8652 (2020)
dc.identifier.uri	https://hdl.handle.net/10550/76276
dc.description	Hetero-structures for Efficient Luminescent Devices (HELD)	en
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.description.abstract	Producción en seco para celdas solares basadas en perovskitas usando haluros metálicos benignos	es
dc.description.sponsorship	EXCELLENT SCIENCE - European Research Council (ERC)
dc.description.sponsorship	Agencia Estatal de Investigación
dc.language.iso	eng
dc.relation	Producción en seco para celdas solares basadas en perovskitas usando haluros metálicos benignos
dc.relation.ispartof	Chemistry of Materials, 2020, vol. 32, num. 19, p. 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	journal article	es_ES
dc.date.updated	2020-11-06T15:49:59Z
dc.identifier.doi	10.1021/acs.chemmater.0c03038
dc.identifier.idgrec	141182
dc.rights.accessRights	open access	es_ES
dc.relation.projectID	ERC/Grant agreement ID: 834431	en
dc.relation.projectID	AEI/PCI2019-111829-2