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. 2020 Aug 24;11:4213. doi: 10.1038/s41467-020-18110-7

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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. 2 — a Comparison of current density (top graph) and radiance (bottom graph) between PeLEDs using Al/ITO/Ag/ITO (black line), ITO (blue line), ITO/Ag/ITO (green line), and Al (red line) as back electrodes. b Comparison of the optical transmittance of Al/ITO/Ag/ITO PeLED (black solid line) and ITO PeLED (blue solid line) and their respective Al/ITO/Ag/ITO (black dashed line) and ITO (blue dashed line) transparent electrodes on glass. Bottom plots show the emission spectra of a typical smart-watch display, and the NIR EL spectrum of the PeLED.