05.Na3YSi3O9:Ce3+, Tb3+荧光粉的制备及发光性能研究

Na₃YSi₃O₉:Ce³⁺, Tb³⁺荧光粉的制备及发光性能研究

刘延雷¹, 刘军², 戚世梅³, 赵文玉⁴*

(1. 河南省高远公路养护技术有限公司，河南新乡，453003;  2. 英特美光电(苏州)有限公司，江苏苏州，215555; 3. 新乡市质量技术监督检验测试中心，河南新乡453000;  4. 内蒙古科技大学化学与化工学院，内蒙古包头014010)

关键词光致发光；荧光粉；Na₃YSi₃O₉: Ce³⁺,Tb³⁺

中图分类号：O482.31        文献识别码：A

摘要：利用高温固相法制备一系列Na₃YSi₃O₉:Ce³⁺,Tb³⁺荧光粉，通过X-射线衍射仪和光致发光光谱分别对其物相和发光性能进行表征。结果表明：在Na₃YSi₃O₉共掺Ce³⁺和Tb³⁺并未改变其晶格结构；激发光谱主要由Tb³⁺的f-f跃迁以及Ce³⁺和Tb³⁺的4f-5d跃迁组成；在320nm激发下，发射光谱出现Tb³⁺的f-f和弱Ce³⁺的5d-4f跃迁发射，其主峰来自于Tb³⁺的⁵D₄→⁷F₅跃迁；色坐标为（0.2402,0.4429）；由于Ce³⁺对Tb³⁺的敏化作用和浓度猝灭，Tb³⁺的发射强度随着Tb³⁺或Ce³⁺掺杂量的增加先提高后减弱。Ce³⁺和Tb³⁺的最佳掺杂量分别为0.04和0.25。

Preparationand Luminescent properties of phosphors Na₃YSi₃O₉: Ce³⁺,Tb³⁺

LIUYan-lei¹, LIU Jun ², QI Shi-mei³, ZHAO Wen-yu^4*,

(1. Henan Gaoyuan Maintenance Technology of highway co.,Ltd., Xinxiang 453003, China;  2. Intematix Photonics(Suzhou) Co., Ltd., Suzhou 215555, China;  3. Xinxiang Center for Quality Technical and Supervision,Xinxiang 453000, China; 4. School of Chemistry and chemicalEngineering, Inner Mongolia University of Science and Technology, Baotou014010, China)

Keywords:Photoluminescence; Phosphor; Na3YSi3O9: Ce³⁺,Tb³⁺

Abstract: Allphosphors Na₃YSi₃O₉:Ce³⁺,Tb³⁺ were prepared using high-temperaturesolid-phase method. X-Ray powder diffraction (XRD) and Photoluminescence(PL) spectrum were used tocharacterize structureand PL properties, respectively. The results show that all Ce³⁺ andTb³⁺ ions dissolved inthe Na₃YSi₃O₉latticewithoutchanging its crystal structure. Excitation spectrum consisted of f-ftransitions of Tb³⁺ and 4f-5dcharacteristic transitions of Tb³⁺ and Ce³⁺ ions. Underexcitation at 320 nm, emission spectrum showed some f-ftransitions of Tb³⁺ and a weak broadband emission of Ce³⁺(5d-4f). The strongest emission was from ⁵D₄→⁷F₅ transition of Tb³⁺. The chromaticity coordinate was (0.2402, 0.4429). Because of energy transfer from Ce³⁺to Tb³⁺ and concentration quenching, Tb³⁺ emissionsintensity increased then decreased withthe increase of Tb³⁺ or Ce³⁺ concentration. The optimumCe³⁺and Tb³⁺ doping concentration was 0.04 and 0.25,respectively.