Xianzheng Pang, Siguo Xiao, Chuting Zeng, Xiaoliang Yang
{"title":"自激活NaLa4(SiO4)3F并通过空位缺陷和Ce3的共敏化增强NaLa4(SiO4)3F中Tb3+/Dy3+的发射。","authors":"Xianzheng Pang, Siguo Xiao, Chuting Zeng, Xiaoliang Yang","doi":"10.1016/j.saa.2025.127040","DOIUrl":null,"url":null,"abstract":"<p><p>Self-activated purple luminescence at 385 nm originating in vacancy defects in NaLa₄(SiO₄)₃F synthesized under reducing atmosphere is observed under excitation of 320 nm for the first time. Ce<sup>3+</sup> ions doped in NaLa₄(SiO₄)₃F exhibit PLE and PL spectra that are highly similar to the vacancy defects in it. The emission intensity of Tb<sup>3+</sup> and Dy<sup>3+</sup> doped in NaLa₄(SiO₄)₃F can be improved by 11 and 7.5 times under 315 nm excitation, caused by the co-sensitization energy transfers from vacancy defects and Ce<sup>3+</sup> ions to Tb<sup>3+</sup> and Dy<sup>3+</sup> ions. By adjusting the concentrations of Tb<sup>3+</sup> and Dy<sup>3+</sup>, the luminescence color of NaLa₄(SiO₄)₃F: Ce<sup>3+</sup>, Tb<sup>3+</sup> and NaLa₄(SiO₄)₃F: Ce<sup>3+</sup>, Dy<sup>3+</sup> phosphors can be tuned from violet to green and from violet to white, respectively. It is found that the NaLa₄(SiO₄)₃F: Ce<sup>3+</sup>, Tb<sup>3+</sup>/Dy<sup>3+</sup> series phosphors exhibit potential application prospects in ultraviolet pc-WLEDs, optical temperature sensing and fluorescence anticounterfeit.</p>","PeriodicalId":94213,"journal":{"name":"Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy","volume":"347 ","pages":"127040"},"PeriodicalIF":4.6000,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Self-activated NaLa<sub>4</sub>(SiO<sub>4</sub>)<sub>3</sub>F and enhanced Tb<sup>3+</sup>/Dy<sup>3+</sup> emission in NaLa<sub>4</sub>(SiO<sub>4</sub>)<sub>3</sub>F via co-sensitization of vacancy defect and Ce<sup>3</sup>.\",\"authors\":\"Xianzheng Pang, Siguo Xiao, Chuting Zeng, Xiaoliang Yang\",\"doi\":\"10.1016/j.saa.2025.127040\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Self-activated purple luminescence at 385 nm originating in vacancy defects in NaLa₄(SiO₄)₃F synthesized under reducing atmosphere is observed under excitation of 320 nm for the first time. Ce<sup>3+</sup> ions doped in NaLa₄(SiO₄)₃F exhibit PLE and PL spectra that are highly similar to the vacancy defects in it. The emission intensity of Tb<sup>3+</sup> and Dy<sup>3+</sup> doped in NaLa₄(SiO₄)₃F can be improved by 11 and 7.5 times under 315 nm excitation, caused by the co-sensitization energy transfers from vacancy defects and Ce<sup>3+</sup> ions to Tb<sup>3+</sup> and Dy<sup>3+</sup> ions. By adjusting the concentrations of Tb<sup>3+</sup> and Dy<sup>3+</sup>, the luminescence color of NaLa₄(SiO₄)₃F: Ce<sup>3+</sup>, Tb<sup>3+</sup> and NaLa₄(SiO₄)₃F: Ce<sup>3+</sup>, Dy<sup>3+</sup> phosphors can be tuned from violet to green and from violet to white, respectively. It is found that the NaLa₄(SiO₄)₃F: Ce<sup>3+</sup>, Tb<sup>3+</sup>/Dy<sup>3+</sup> series phosphors exhibit potential application prospects in ultraviolet pc-WLEDs, optical temperature sensing and fluorescence anticounterfeit.</p>\",\"PeriodicalId\":94213,\"journal\":{\"name\":\"Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy\",\"volume\":\"347 \",\"pages\":\"127040\"},\"PeriodicalIF\":4.6000,\"publicationDate\":\"2025-10-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1016/j.saa.2025.127040\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1016/j.saa.2025.127040","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Self-activated NaLa4(SiO4)3F and enhanced Tb3+/Dy3+ emission in NaLa4(SiO4)3F via co-sensitization of vacancy defect and Ce3.
Self-activated purple luminescence at 385 nm originating in vacancy defects in NaLa₄(SiO₄)₃F synthesized under reducing atmosphere is observed under excitation of 320 nm for the first time. Ce3+ ions doped in NaLa₄(SiO₄)₃F exhibit PLE and PL spectra that are highly similar to the vacancy defects in it. The emission intensity of Tb3+ and Dy3+ doped in NaLa₄(SiO₄)₃F can be improved by 11 and 7.5 times under 315 nm excitation, caused by the co-sensitization energy transfers from vacancy defects and Ce3+ ions to Tb3+ and Dy3+ ions. By adjusting the concentrations of Tb3+ and Dy3+, the luminescence color of NaLa₄(SiO₄)₃F: Ce3+, Tb3+ and NaLa₄(SiO₄)₃F: Ce3+, Dy3+ phosphors can be tuned from violet to green and from violet to white, respectively. It is found that the NaLa₄(SiO₄)₃F: Ce3+, Tb3+/Dy3+ series phosphors exhibit potential application prospects in ultraviolet pc-WLEDs, optical temperature sensing and fluorescence anticounterfeit.
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