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. 2020 Oct 13;11:5146. doi: 10.1038/s41467-020-18940-5

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 6 — a Diagram showing R2R processing for the fabrication of flexible PSCs. b Photograph of fully R2R-processed PSCs. (inset) Image of a R2R-processed roll showing constituent layers of PSCs after removing each layer manually. c Cross-sectional SEM image of fully R2R printed PSCs. Each layer was given a different color. d J-V curves of champion device made from R2R-processed SnO₂/perovskite and Spiro-OMeTAD (shear-coating: purple, spin-coating: indigo). e The J-V curves of fully R2R gravure-printed PSCs. FAPbI₃ denotes (FAPbI₃)_0.95(MAPbBr₃)_0.05.