Self-activated NaLa₄(SiO₄)₃F and enhanced Tb³⁺/Dy³⁺ emission in NaLa₄(SiO₄)₃F via co-sensitization of vacancy defect and Ce³.

IF 4.6

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Pub Date : 2025-10-09 DOI:10.1016/j.saa.2025.127040

Xianzheng Pang, Siguo Xiao, Chuting Zeng, Xiaoliang Yang

{"title":"Self-activated NaLa4(SiO4)3F and enhanced Tb3+/Dy3+ emission in NaLa4(SiO4)3F via co-sensitization of vacancy defect and Ce3.","authors":"Xianzheng Pang, Siguo Xiao, Chuting Zeng, Xiaoliang Yang","doi":"10.1016/j.saa.2025.127040","DOIUrl":null,"url":null,"abstract":"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.","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}

引用次数: 0

Abstract

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.

查看原文本刊更多论文

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。

在320 nm激发下，首次观察到还原气氛下合成的NaLa₄（SiO₄）₃F中空位缺陷在385 nm处产生的自激活紫色发光。在NaLa₄（SiO₄）₃F中掺杂Ce3+离子表现出与空位缺陷高度相似的PLE和PL光谱。NaLa₄（SiO₄）₃F中掺杂的Tb3+和Dy3+在315 nm激发下的发射强度分别提高了11倍和7.5倍，这是由于空位缺陷和Ce3+离子向Tb3+和Dy3+离子的共敏能转移所致。通过调整Tb3+和Dy3+的浓度，NaLa₄（SiO₄）₃F: Ce3+， Tb3+和NaLa₄（SiO₄）₃F: Ce3+， Dy3+荧光粉的发光颜色可以分别从紫色调到绿色和从紫色调到白色。发现NaLa₄（SiO₄）₃F: Ce3+， Tb3+/Dy3+系列荧光粉在紫外pc- wled、光学感温和荧光防伪等方面具有潜在的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

自引率

0.00%

发文量