Kinetic Stabilization of the Sol-Gel State in Perovskites Enables Facile Processing of High-Efficiency Solar Cells

© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 31(2019), 32 vom: 06. Aug., Seite e1808357
1. Verfasser: Wang, Kai (VerfasserIn)
Weitere Verfasser: Tang, Ming-Chun, Dang, Hoang X, Munir, Rahim, Barrit, Dounya, De Bastiani, Michele, Aydin, Erkan, Smilgies, Detlef-M, De Wolf, Stefaan, Amassian, Aram
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article anti-solvent drip hybrid perovskite solar cells in situ GIWAXS kinetic stabilization mixed-cation mixed-halide perovskites
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520 |a Perovskite solar cells increasingly feature mixed-halide mixed-cation compounds (FA1- x - y MAx Csy PbI3- z Brz ) as photovoltaic absorbers, as they enable easier processing and improved stability. Here, the underlying reasons for ease of processing are revealed. It is found that halide and cation engineering leads to a systematic widening of the anti-solvent processing window for the fabrication of high-quality films and efficient solar cells. This window widens from seconds, in the case of single cation/halide systems (e.g., MAPbI3 , FAPbI3 , and FAPbBr3 ), to several minutes for mixed systems. In situ X-ray diffraction studies reveal that the processing window is closely related to the crystallization of the disordered sol-gel and to the number of crystalline byproducts; the processing window therefore depends directly on the precise cation/halide composition. Moreover, anti-solvent dripping is shown to promote the desired perovskite phase with careful formulation. The processing window of perovskite solar cells, as defined by the latest time the anti-solvent drip yields efficient solar cells, broadened with the increasing complexity of cation/halide content. This behavior is ascribed to kinetic stabilization of sol-gel state through cation/halide engineering. This provides guidelines for designing new formulations, aimed at formation of the perovskite phase, ultimately resulting in high-efficiency perovskite solar cells produced with ease and with high reproducibility 
650 4 |a Journal Article 
650 4 |a anti-solvent drip 
650 4 |a hybrid perovskite solar cells 
650 4 |a in situ GIWAXS 
650 4 |a kinetic stabilization 
650 4 |a mixed-cation mixed-halide perovskites 
700 1 |a Tang, Ming-Chun  |e verfasserin  |4 aut 
700 1 |a Dang, Hoang X  |e verfasserin  |4 aut 
700 1 |a Munir, Rahim  |e verfasserin  |4 aut 
700 1 |a Barrit, Dounya  |e verfasserin  |4 aut 
700 1 |a De Bastiani, Michele  |e verfasserin  |4 aut 
700 1 |a Aydin, Erkan  |e verfasserin  |4 aut 
700 1 |a Smilgies, Detlef-M  |e verfasserin  |4 aut 
700 1 |a De Wolf, Stefaan  |e verfasserin  |4 aut 
700 1 |a Amassian, Aram  |e verfasserin  |4 aut 
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773 1 8 |g volume:31  |g year:2019  |g number:32  |g day:06  |g month:08  |g pages:e1808357 
856 4 0 |u http://dx.doi.org/10.1002/adma.201808357  |3 Volltext 
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