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Title: | 3D Perovskite Passivation with a Benzotriazole-Based 2D Interlayer for High-Efficiency Solar Cells | Authors: | Caiazzo, Alessandro MAUFORT, Arthur van Gorkom, Bas T. Remmerswaal, Willemijn H. M. Orri, Jordi Ferrer Li, Junyu Wang, Junke VAN GOMPEL, Wouter Van Hecke, Kristof Kusch, Gunnar Oliver, R. A. Ducati, Caterina LUTSEN, Laurence Wienk, Martijn M. Stranks, Samuel D. VANDERZANDE, Dirk Janssen, Rene A. J. |
Issue Date: | 2023 | Publisher: | AMER CHEMICAL SOC | Source: | ACS Applied Energy Materials, 6 (7) , p. 3933 -3943 | Abstract: | 2H-Benzotriazol-2-ylethylammonium bromide and iodide and its difluorinated derivatives are synthesized and employed as interlayers for passivation of formamidinium lead triiodide (FAPbI3) solar cells. In combination with PbI2 and PbBr2, these benzotriazole derivatives form two-dimensional (2D) Ruddlesden-Popper perovskites (RPPs) as evidenced by their crystal structures and thin film characteristics. When used to passivate n-i-p FAPbI3 solar cells, the power conversion efficiency improves from 20% to close to 22% by enhancing the open-circuit voltage. Quasi-Fermi level splitting experiments and scanning electron microscopy cathodoluminescence hyperspectral imaging reveal that passivation provides a reduced nonradiative recombi-nation at the interface between the perovskite and hole transport layer. Photoluminescence spectroscopy, angle-resolved grazing-incidence wide-angle X-ray scattering, and depth profiling X-ray photoelectron spectroscopy studies of the 2D/three-dimensional (3D) interface between the benzotriazole RPP and FAPbI3 show that a nonuniform layer of 2D perovskites is enough to passivate defects, enhance charge extraction, and decrease nonradiative recombination. | Notes: | Janssen, RAJ (corresponding author), Eindhoven Univ Technol, Mol Mat & Nanosyst & Inst Complex Mol Syst, NL-5600 MB Eindhoven, Netherlands.; Janssen, RAJ (corresponding author), Dutch Inst Fundamental Energy Res, NL-5612 AJ Eindhoven, Netherlands. r.a.j.janssen@tue.nl |
Keywords: | 2D perovskites;passivation;solar cells;FAPbI3;benzotriazole | Document URI: | http://hdl.handle.net/1942/40000 | ISSN: | 2574-0962 | DOI: | 10.1021/acsaem.3c00101 | ISI #: | 000959721400001 | Rights: | 2023 The Authors. Published by American Chemical Society | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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3D Perovskite Passivation with a Benzotriazole-Based 2D Interlayer for High-Efficiency Solar Cells.pdf | Published version | 8.44 MB | Adobe PDF | View/Open |
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