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. 2021 Apr 16;12:2297. doi: 10.1038/s41467-021-22609-y

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© The Author(s) 2021

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. 3 — a Time-resolved photoluminescence spectra and b phosphorescence decay curves under irradiation with 254 nm UV light for different irradiation times. c Excitation-phosphorescence emission mapping under 0, 5, 45, and 120 min continuous irradiation with 5 ms delay at room temperature. Em.Wave. emission wavelength, Ex.Wave. exitation wavelength. d Phosphorescence emission observed at different time intervals before and after switching off the light excitation at ambient conditions. e Phosphorescence spectra of SDP-doped film after 45 min irradiation measured at different temperatures from 77 to 250 K. f Nonradiative decay rate constant with different irradiation times.