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1.生态环境和信息特种功能材料教育部重点实验室(河北工业大学), 天津 300130
2.河北工业大学 材料科学与工程学院, 天津 300130
[ "张荣 (1999-),女,陕西西安人,博士研究生,2021 年于河北工业大学获得硕士学位,主要从事稀土发光材料的研究。Email: zhangrong@hebut.edu.cn" ]
[ "孙剑锋(1983-),男,辽宁辽阳人,博士,副教授,2014 年于清华大学获得博士学位,主要从事稀土发光材料的研究。Email: sunjianfeng10@hebut.edu.cn" ]
收稿日期:2022-12-12,
修回日期:2023-01-03,
纸质出版日期:2023-05-05
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张荣,孙剑锋.基于双发光位点能量传递构建高效窄带钙钛矿构型K2BaPO4F∶Eu2+荧光粉[J].发光学报,2023,44(05):819-836.
ZHANG Rong,SUN Jianfeng.Efficiently Narrow-band Perovskite-type Phosphor K2BaPO4F∶Eu2+ Based on Dual-sites-triggered Energy Transfer Behavior[J].Chinese Journal of Luminescence,2023,44(05):819-836.
张荣,孙剑锋.基于双发光位点能量传递构建高效窄带钙钛矿构型K2BaPO4F∶Eu2+荧光粉[J].发光学报,2023,44(05):819-836. DOI: 10.37188/CJL.20220412.
ZHANG Rong,SUN Jianfeng.Efficiently Narrow-band Perovskite-type Phosphor K2BaPO4F∶Eu2+ Based on Dual-sites-triggered Energy Transfer Behavior[J].Chinese Journal of Luminescence,2023,44(05):819-836. DOI: 10.37188/CJL.20220412.
随着近紫外芯片激发三基色荧光粉技术的发展,开发用于液晶显示背光源以满足高品质显示需求的新型窄带蓝色荧光粉已经成为材料研究者日益关注的焦点。本文采用高温固相法合成了具有钙钛矿结构原型的K
2
BaPO
4
F∶Eu
2+
窄带蓝色荧光粉。K
2
BaPO
4
F基质由[FK
4
Ba
2
]八面体以共享Ba、K原子的方式相连形成三维网状阴离子框架,进而与孔道中的[PO
4
]四面体连接形成K
2
BaPO
4
F钙钛矿结构框架。Rietveld精修分析表明,Eu
2+
同时占据Ba
2+
和K
+
位点形成[Eu(1)O
8
F
2
]和[Eu(2)O
6
F
2
]配位多面体,两种多面体发光中心存在由偶极⁃偶极效应引起的Eu(1)→Eu(2)能量传递过程,使荧光粉具有发射峰值波长为432 nm、半峰宽为43 nm的高亮度窄带蓝光发射。基于密度泛函理论的第一性原理计算表明,K
2
BaPO
4
F基质为间接带隙化合物,理论带隙值为5.035 eV。K
2
BaPO
4
F∶Eu
2+
荧光粉展现了合适的荧光热稳定性(
I
493 K
/
I
293 K
=64%)和较高的内、外量子效率(分别为72.8%和46.4%),其性能指标虽然劣于BaMgAl
10
O
17
∶Eu
2+
、K
1.6
Al
11
O
17+
δ
∶Eu
2+
、Na
3
Sc
2
(PO
4
)
3
∶Eu
2+
等典型蓝粉,但优于其他一些已报道的蓝色荧光粉。上述研究工作不仅展现了K
2
BaPO
4
F∶Eu
2+
作为一种新型窄带蓝色荧光粉的应用潜力,而且也为基于矿物结构原型策略探索新型荧光粉提供了可能性。
Along with the development of versatile trichromatic phosphors, exploring novel narrow-band blue-emitting phosphors has been an ongoing focus in liquid crystal display backlighting to satisfy the high-quality display demands. Herein, an intriguing narrow-band blue-emitting phosphor K
2
BaPO
4
F∶Eu
2+
belonging to the perovskite-type structural prototype is synthesized
via
the solid-state reaction. Structural analysis indicates that the [FK
4
Ba
2
] octahedra is interlinked with each other by sharing Ba and K atoms to build a three-dimensional network together with [PO
4
] tetrahedra in the cavities. Rietveld refinement analysis shows that the Eu
2+
ions reside in both Ba
2+
and K
+
sites to form the [Eu(1)O
8
F
2
] and [Eu(2)O
6
F
2
] polyhedra, which totally induce an intense blue emission peaking at 432 nm with a narrow full width at half-maximum of 43 nm, theoretically verified by the dipole-dipole interaction in the Eu(1)→Eu(2) energy transfer process. The electronic structure of K
2
BaPO
4
F matrix is studied by the first-principle calculation on the basis of the density functional theory, demonstrating that it has a large indirect band of 5.035 eV. The K
2
BaPO
4
F∶Eu
2+
phosphor exhibits a suitable thermal stability (
I
493 K
/
I
293 K
=64%) and possesses the satisfactory internal/external quantum efficiency of 72.8%/46.4%, which although is inferior to that of the representative BaMgAl
10
O
17
∶Eu
2+
,
K
1.6
Al
11
O
17+
δ
∶Eu
2+
and Na
3
Sc
2
(PO
4
)
3
∶Eu
2+
phosphors, yet surpasses some other recently reported blue-emitting phosphors. Consequently, the present work not only demonstrates the potential of K
2
BaPO
4
F∶Eu
2+
phosphor as a new narrow-band blue-emitting phosphor candidate, but provides the possibility for exploring the novel phosphors inspired by the mineral-type structural prototypes.
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张荣 (1999 -) , 女 , 陕西西安人 , 博士研究生 , 2021年于河北工业大学获得硕士学位 , 主要从事稀土发光材料的研究 。. doi: 10.1002/lpor.202200473 http://dx.doi.org/10.1002/lpor.202200473
E⁃mail: zhangrong@hebut . edu.cn . doi: 10.1002/lpor.202200473 http://dx.doi.org/10.1002/lpor.202200473
孙剑锋(1983 -) , 男 , 辽宁辽阳人 , 博士 , 副教授 , 2014年于清华大学获得博士学位 , 主要从事稀土发光材料的研究 。. doi: 10.1002/lpor.202200473 http://dx.doi.org/10.1002/lpor.202200473
E⁃mail: sunjianfeng10@hebut . edu.cn . doi: 10.1002/lpor.202200473 http://dx.doi.org/10.1002/lpor.202200473
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