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. 2023 Aug 1;14:4611. doi: 10.1038/s41467-023-40150-y

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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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 3 — a Schematic of the of PeQWs-based LED device structure. b An SEM image showing the cross-section of the device c Energy band diagram of each functional layer. d, e XPS spectra of Pb 4f and Br 3d peaks for PeQWs coated with and without TAPC and TBTB.