Inkjet-printed micrometer-thick perovskite solar cells with large columnar grains
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 d...
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| Main Authors: | , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2020
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| In: |
Advanced energy materials
Year: 2019, Volume: 10, Issue: 6 |
| ISSN: | 1614-6840 |
| DOI: | 10.1002/aenm.201903184 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1002/aenm.201903184 Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.201903184 
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| Author Notes: | Helge Eggers, Fabian Schackmar, Tobias Abzieher, Qing Sun, Uli Lemmer, Yana Vaynzof, Bryce S. Richards, Gerardo Hernandez‐Sosa, and Ulrich W. Paetzold |
| Summary: | 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. |
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| Item Description: | First published: 19 December 2019 Gesehen am 14.09.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1614-6840 |
| DOI: | 10.1002/aenm.201903184 |