发光学报, 2019, 40 (9): 1086, 网络出版: 2019-09-27   

(Mg1-xSrx)2SiO4∶(Eu3+,F-)荧光粉的物相及光谱

Phase Constitutions and Luminescent Spectra of (Mg1-xSrx)2SiO4∶(Eu3+,F-) Phosphors
作者单位
1 南昌大学 材料科学与工程学院, 江西 南昌 330001
2 南昌大学 江西省轻质高强结构材料重点实验室, 江西 南昌 330001
摘要
采用高温固相法在空气氛围下在1 150 ℃制备(Mg1-xSrx)2SiO4 (x=0~1)粉末。物相分析表明, 随着Sr离子含量由小到大, (Mg1-xSrx)2SiO4基质晶相组成将发生如下变化: γ-Mg2SiO4、β-Mg2SiO4混合相(x=0)→α-Sr2SiO4、β-Sr2SiO4、γ-Mg2SiO4、β-Mg2SiO4、Sr3MgSi2O8混合相(0.2≤x≤0.8)→α-Sr2SiO4和β-Sr2SiO4混合相(x=1); 当x=0.2时主晶相为高温β-Mg2SiO4, 而在x=0时主晶相为低温γ-Mg2SiO4。紫外发光照相和光谱表明, 当x=0.2时, (Mg1-xSrx)1.96SiO4∶0.04(Eu3+,F-)红光发射亮度最大。进一步晶体结构分析发现Sr离子可以固溶入β-Mg2SiO4使得β-Mg2SiO4更为稳定, 同时晶格略微增大; 化学配比为(Mg0.8Sr0.2)2SiO4粉末在1 250 ℃煅烧可以得到平均粒径为21.68 μm的单相β-Mg2SiO4粉末。对于单相(Mg0.8Sr0.2)2-ySiO4∶y(Eu3+,F-)系列荧光粉, 其XPS分析表明Eu离子以三价进入晶格; 光谱分析表明在365 nm和254 nm激发下, 有595, 615(主峰), 655, 705 nm红光锐峰发射(对应5D0→7Fn, n=1,2,3,4); 且y=0.04为最佳铕离子掺杂浓度(此时其量子效率、寿命均达到最大); 基于Blasse理论可判断铕离子间能量传递方式为基于辐射跃迁的电四极-电四极作用。=
Abstract
(Mg1-xSrx)2-ySiO4(x=0~1) powder was prepared at 1 150 ℃ by high temperature solid-state method. As Sr ion content in matrix increasing, the phase constitutions change from γ-Mg2SiO4, β-Mg2SiO4 mixture(x=0) to α-Sr2SiO4, β-Sr2SiO4, γ-Mg2SiO4, β-Mg2SiO4, Sr3MgSi2O8 mixture(0.2≤x≤0.8), then to α-Sr2SiO4, β-Sr2SiO4 mixture(x=1). Furthermore, when x=0.2, the main phase is β-Mg2SiO4, while x=0, the main phase is γ-Mg2SiO4. UV light excitation and luminescent spectra analysis show (Mg0.8Sr0.2)1.96SiO4∶0.04(Eu3+,F-) has been picked out as the best red phosphor composition among (Mg1-xSrx)1.96SiO4∶0.04(Eu3+,F-). Sr ion would go into β-Mg2SiO4 crystal lattice, and makes the phase more stable. When the annealing temperature reaching at 1 250 ℃, the powder has the composition as (Mg0.8Sr0.2)2SiO4 would be single phase as β-Mg2SiO4. (Mg0.8Sr0.2)2-ySiO4∶y(Eu3+,F-) series(~21.68 μm) have red-band emission peaks at 595, 615(main), 655, 705 nm(related to5D0→7Fn, n=1, 2, 3, 4) under 365 nm or 254 nm excitation, and the most suitable Eu3+ doping amount is 4%(the quantum yields and lifetime both reaching to maxium value among the series). Based on Blasse theory, the main energy transfer mode for activators should be the four electric dipoles(q-q).

汪雨, 罗岚, 郭锐, 徐诗林, 孙传耀. (Mg1-xSrx)2SiO4∶(Eu3+,F-)荧光粉的物相及光谱[J]. 发光学报, 2019, 40(9): 1086. WANG Yu, LUO Lan, GUO Rui, XU Shi-lin, SUN Chuan-yao. Phase Constitutions and Luminescent Spectra of (Mg1-xSrx)2SiO4∶(Eu3+,F-) Phosphors[J]. Chinese Journal of Luminescence, 2019, 40(9): 1086.

本文已被 1 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!