K_(7)ZnSc_(2)B_(15)O_(30):Dy^(3+)荧光粉的制备及其发光性质  

Preparation and Luminescence Properties of K_(7)ZnSc_(2)B_(15)O_(30):Dy^(3+)Phosphor

作　　者：付颖 张凤[2] FU Ying;ZHANG Feng(Huanghe Jiaotong University,Basic Teaching Department,Wuzhi Henan 454950,China;Key Lab of Photovoltaic Materials of Henan Province,Henan University,Kaifeng Henan 475001,China)

机构地区：[1]黄河交通学院基础教学部,河南武陟454950 [2]河南大学光伏材料省重点实验室,河南开封475001

出　　处：《淮阴师范学院学报（自然科学版）》2023年第3期223-228,共6页Journal of Huaiyin Teachers College;Natural Science Edition

基　　金：国家自然科学基金资助项目(51402088)。

摘　　要：采用高温固相法制备了Dy^(3+)掺杂的K_(7)ZnSc_(2)B_(15)O_(30)黄光荧光粉,并对其发光性质进行研究.经过X射线衍射分析所制备的系列荧光粉均为纯相无杂质生成.在350 nm的光激发下,K_(7)ZnSc_(2)B_(15)O_(30):Dy^(3+)在490 nm和576 nm的呈现两个主要发射峰,分别属于Dy^(3+)离子的^(4)F_(9/2)→^(6)H_(15/2)和^(4)F_( 9/2)→^(6)H_(13/2)跃迁.Dy^(3+)离子的黄色发射明显强于蓝色发射,说明电偶极子跃迁占据主导地位,表明Dy^(3+)位于K_(7)ZnSc_(2)B_(15)O_(30)基质的低对称位置.随着Dy^(3+)离子掺杂浓度增加,K_(7)ZnSc_(2)B_(15)O_(30):Dy^(3+)的发光强度呈现先增强后降低的趋势,这是由于Dy^(3+)离子的浓度猝灭.根据Dexter能量传递理论,分析Dy^(3+)离子浓度的猝灭机制是电偶极-电偶极相互作用.CIE色度坐标和适宜的色温表明,K_(7)ZnSc_(2)B_(15)O_(30):Dy^(3+)荧光粉在LED照明器件中具有潜在的应用价值.In this paper,Dy^(3+)doped K_(7)ZnSc_(2)B_(15)O_(30) yellow phosphor was successfully prepared by high temperature solid phase method,and its luminescence properties were studied.A series of phosphors prepared by X-ray diffraction analysis were all pure phase and no impurities were generated.At 350 nm,K_(7)ZnSc_(2)B_(15)O_(30):Dy^(3+)exhibits two major emission peaks of 490 nm and 576 nm,which belong to the ^(4)F_(9/2)→^(6)H_(15/2)and ^(4)F_( 9/2)→^(6)H_(13/2) transitions of Dy^(3+)ions,respectively.The yellow emission of Dy^(3+)ions was significantly stronger than the blue emission,indicating that the electric dipole transition was dominant,which indicates that Dy^(3+)was located in the low symmetric position of the KZSBO host.With the increase of Dy^(3+)ion doping concentration,the luminous intensity of K_(7)ZnSc_(2)B_(15)O_(30):Dy^(3+)shows a trend of first increasing and then decreasing,which was due to the quenching of Dy^(3+)ion concentration.According to the Dexter energy transfer theory,the quenching mechanism of Dy^(3+)ion concentration was analyzed to be the electric dipole-electric dipole interaction.Finally,CIE chromaticity coordinates and suitable color temperature indicate that K_(7)ZnSc_(2)B_(15)O_(30):Dy^(3+)phosphor has potential research value for LED lighting devices.

关 键 词：荧光粉 能量转移 光致发光特性 

分 类 号：TQ422[化学工程]