
人工晶体学报 ›› 2026, Vol. 55 ›› Issue (9): 1472-1480.DOI: 10.16553/j.cnki.issn1000-985x.2026.0027
收稿日期:2026-02-24
出版日期:2026-09-20
发布日期:2026-09-29
作者简介:王庆平(1991—),女,河南省人,讲师。E-mail:919632788@qq.com
基金资助:
WANG Qingping1(
), WANG Libo1, JIN Ye2
Received:2026-02-24
Online:2026-09-20
Published:2026-09-29
摘要: 针对近紫外激发型白光发光二极管(WLED)对高显色性、低色温单基质荧光粉的迫切需求,本研究提出一种基于MgY2Si3O10基质、Bi3+与Eu3+共掺杂的新型颜色可调荧光粉体系。采用高温固相法成功合成了系列MgY2Si3O10∶0.02Bi3+,mEu3+(m=0~0.22)样品,系统表征了其物相结构与发光特性。结果表明,Bi3+在基质中占据两种晶格格位,在344 nm激发下呈现双峰宽带发射,Eu3+则呈现典型的红光发射。通过光谱重叠分析与荧光寿命测试,证实了Bi3+向Eu3+存在高效的能量传递,其传递效率随Eu3+掺杂浓度增加最高可达约65%。基于浓度猝灭模型计算得到临界能量传递距离RC≈13.2 ?,确定能量传递机制主要为电偶极-电四极(d-q)相互作用。通过调节Eu3+掺杂浓度,成功实现了发光颜色从蓝光经白光到红光的连续可调,其中白光发射色度坐标为(0.333,0.306),相关色温为5 419 K,显色指数约为85.6,且该体系表现出良好的热稳定性。本研究为开发高性能、颜色可调的WLED荧光材料提供了系统的实验与理论依据。
中图分类号:
王庆平, 王丽博, 金叶. Bi3+,Eu3+共掺MgY2Si3O10可调谐发光特性研究[J]. 人工晶体学报, 2026, 55(9): 1472-1480.
WANG Qingping, WANG Libo, JIN Ye. Tunable Luminescence Properties of Bi3+ and Eu3+ Co-Doped MgY2Si3O10[J]. Journal of Synthetic Crystals, 2026, 55(9): 1472-1480.
图3 MgY2Si3O10∶0.02Bi3+荧光粉的PLE和PL光谱。(a)λex=370 nm, λem=411 nm; (b)λex=344 nm, λem=490 nm
Fig.3 PLE and PL spectra of MgY2Si3O10∶0.02Bi3+ phosphor. (a) λex=370 nm, λem=411 nm; (b) λex=344 nm, λem=490 nm
图4 MgY2Si3O10∶0.14Eu3+荧光粉的PLE光谱与MgY2Si3O10∶0.02Bi3+荧光粉的PL光谱
Fig.4 PLE spectrum of MgY2Si3O10∶0.14Eu3+ phosphor and PL spectrum of MgY2Si3O10∶0.02Bi3+ phosphor
图6 344 nm激发下MgY2Si3O10∶0.02Bi3+,mEu3+荧光粉在490 nm处的荧光衰减曲线
Fig.6 Fluorescence decay curves of MgY2Si3O10∶0.02Bi3+,mEu3+ phosphors monitored at 490 nm under 344 nm excitation
图7 370 nm激发下MgY2Si3O10∶0.02Bi3+,mEu3+荧光粉在411 nm处的荧光衰减曲线
Fig.7 Fluorescence decay curves of MgY2Si3O10∶0.02Bi3+, mEu3+ phosphors monitored at 411 nm under 370 nm excitation
图10 MgY2Si3O10∶0.02Bi3+,0.14Eu3+荧光粉变温发射光谱(a)与热激活能拟合曲线(b)
Fig.10 Temperature-dependent emission spectra (a) and thermal activation energy fitting curve (b) of MgY2Si3O10∶0.02Bi3+,0.14Eu3+ phosphors
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