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Inkjet‐Printed Micrometer‐Thick Perovskite Solar Cells with Large Columnar Grains

Eggers, Helge; Schackmar, Fabian; Abzieher, Tobias; Sun, Qing; Lemmer, Uli; Vaynzof, Yana; Richards, Bryce S.; Hernandez‐Sosa, Gerardo; Paetzold, Ulrich W.

Transferring the high power conversion efficiencies (PCEs) of spin-coated perovskite solar cells (PSCs) on the laboratory scale to large-area photovoltaic modules requires a significant advance in scalable fabrication methods. Digital inkjet printing promises scalable, material, and cost-efficient deposition of perovskite thin films on a wide range of substrates and in arbitrary shapes. In this work, high-quality inkjet-printed triple-cation (methylammonium, formamidinium, and cesium) perovskite layers with exceptional thicknesses of >1 μm are demonstrated, enabling unprecedentedly high PCEs > 21% and stabilized power output efficiencies > 18% for inkjet-printed PSCs. In-depth characterization shows that the thick inkjet-printed perovskite thin films deposited using the process developed herein exhibit a columnar crystal structure, free of horizontal grain boundaries, which extend over the entire thickness. A thin film thickness of around 1.5 μm is determined as optimal for PSC for this process. Up to this layer thickness X-ray photoemission spectroscopy analysis confirms the expected stoichiometric perovskite composition at the surface and shows strong deviations and inhomogeneities for thicker thin films. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000105473
Veröffentlicht am 15.06.2020
DOI: 10.1002/aenm.201903184
Zitationen: 27
Web of Science
Zitationen: 24
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 11.02.2020
Sprache Englisch
Identifikator ISSN: 1614-6832, 1614-6840
KITopen-ID: 1000105473
HGF-Programm 43.23.04 (POF III, LK 01) Nanophotonics for Energy Conversion
Erschienen in Advanced energy materials
Verlag Wiley-VCH Verlag
Band 10
Heft 6
Seiten Art. Nr.: 1903184
Vorab online veröffentlicht am 19.12.2019
Nachgewiesen in Scopus
Web of Science
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