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Room-Temperature Cubic Phase Crystallization and High Stability of Vacuum-Deposited Methylammonium Lead Triiodide Thin Films for High-Efficiency Solar Cells

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Room-Temperature Cubic Phase Crystallization and High Stability of Vacuum-Deposited Methylammonium Lead Triiodide Thin Films for High-Efficiency Solar Cells

dc.contributor.author	Palazón Huet, Francisco
dc.contributor.author	Pérez-del-Rey, Daniel
dc.contributor.author	Dänekamp, Benedikt
dc.contributor.author	Dreessen, Chris
dc.contributor.author	Sessolo, Michele
dc.contributor.author	Boix, Pablo P.
dc.contributor.author	Bolink, Henk
dc.date.accessioned	2020-06-17T09:51:12Z
dc.date.available	2020-08-16T04:45:08Z
dc.date.issued	2019
dc.identifier.citation	Palazón Huet, Francisco Pérez-del-Rey, Daniel Dänekamp, Benedikt Dreessen, Chris Sessolo, Michele Boix, Pablo P. Bolink, Henk 2019 Room-Temperature Cubic Phase Crystallization and High Stability of Vacuum-Deposited Methylammonium Lead Triiodide Thin Films for High-Efficiency Solar Cells Advanced Materials 31 39 1902692
dc.identifier.uri	https://hdl.handle.net/10550/75091
dc.description.abstract	Methylammonium lead triiodide (MAPI) has emerged as a high-performance photovoltaic material. Common understanding is that at room temperature it adopts a tetragonal phase and it only converts to the perfect cubic phase around 50-60 ºC. Most MAPI films are prepared using a solution-based coating process, yet they can also be obtained by vapor phase deposition methods. Vapor phase processed MAPI films have significantly different characteristics compared to their solvent processed analogous, such as a relatively small crystal grain sizes and short excited state lifetimes. Yet solar cells based on vapor phase processed MAPI films exhibit high power conversion efficiencies. Surprisingly, after detailed characterization we find that our vapor phase processed MAPI films adopt a cubic crystal structure at room temperature that is stable for weeks, even in ambient atmosphere. Furthermore, we demonstrate that by tuning the deposition rates of both precursors during co-deposition it is possible to vary the perovskite phase from cubic to tetragonal at room temperature. Our finding challenges the common belief that MAPI is only stable in tetragonal phase at room temperature. Additionally, these findings can be used to explain the somewhat unexpected high performance of solar cells based on vacuum processed MAPI films with sub 100 nm grain sizes and excited state lifetimes < 100 nanoseconds.
dc.language.iso	eng
dc.relation.ispartof	Advanced Materials, 2019, vol. 31, num. 39, p. 1902692
dc.subject	Cèl·lules fotoelèctriques
dc.subject	Materials
dc.title	Room-Temperature Cubic Phase Crystallization and High Stability of Vacuum-Deposited Methylammonium Lead Triiodide Thin Films for High-Efficiency Solar Cells
dc.type	journal article	es_ES
dc.date.updated	2020-06-17T09:52:56Z
dc.identifier.doi	10.1002/adma.201902692
dc.identifier.idgrec	134405
dc.embargo.terms	1 year
dc.rights.accessRights	open access	es_ES