Inkjet-printed micrometer-thick perovskite solar cells with large columnar grains

• Verfasst von: Eggers, Helge [VerfasserIn]
• Verfasst von: Schackmar, Fabian [VerfasserIn]
• Verfasst von: Abzieher, Tobias [VerfasserIn]
• Verfasst von: Sun, Qing [VerfasserIn]
• Verfasst von: Lemmer, Uli [VerfasserIn]
• Verfasst von: Vaynzof, Yana [VerfasserIn]
• Verfasst von: Richards, Bryce S. [VerfasserIn]
• Verfasst von: Hernandez-Sosa, Gerardo [VerfasserIn]
• Verfasst von: Paetzold, Ulrich Wilhelm [VerfasserIn]
• Titel: Inkjet-printed micrometer-thick perovskite solar cells with large columnar grains
• Verf.angabe: Helge Eggers, Fabian Schackmar, Tobias Abzieher, Qing Sun, Uli Lemmer, Yana Vaynzof, Bryce S. Richards, Gerardo Hernandez‐Sosa, and Ulrich W. Paetzold
• Jahr: 2020
• Jahr des Originals: 2019
• Umfang: 12 S.
• Fussnoten: First published: 19 December 2019 ; Gesehen am 14.09.2020
• Titel Quelle: Enthalten in: Advanced energy materials
• Ort Quelle: Weinheim : Wiley-VCH, 2011
• Jahr Quelle: 2020
• Band/Heft Quelle: 10(2020,6) Artikel-Nummer 1903184, 12 Seiten
• ISSN Quelle: 1614-6840
• DOI: doi:10.1002/aenm.201903184
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: high diffusion lengths
• Sach-SW: inkjet printing
• Sach-SW: large columnar crystal grains
• Sach-SW: perovskite solar cells
• K10plus-PPN: 1732424217

Abstract

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. The micrometer-thick perovskite thin films exhibit remarkably long charge carrier lifetimes, highlighting their excellent optoelectronic characteristics. They are particularly promising for next-generation inkjet-printed perovskite solar cells, photodetectors, and X-ray detectors.