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

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© The Author(s) 2023

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. 4 — a Normalized EL spectra of blue, sky-blue, green and pure-red PeQWs-based LEDs. b The corresponding CIE coordinates. c, d, Representative operational characteristics for our PeQWs-based LEDs. c Current density (J)–voltage (V) and luminance (L)–voltage (V) curves. d, e External quantum efficiency (EQE)–luminance (L) characteristics. f Distribution of EQEs of four PeQWs-based LEDs. g Electroluminescence spectra at different electric biases for blue, sky-blue, green and pure-red PeQWs-based LEDs. The insets show electroluminescence images of for blue, sky-blue, green and pure-red LEDs.