近紫外白光LED用Sr3-xMgSi2O8∶x%Sm^3+(x=1~10)高效橙红色荧光粉的制备与发光性能研究  

Preparation and property of high-efficiency orange-red phosphor for SrMgSiO∶x%Sm(x=1~10)near-UV white LED

作　　者：温慧霞 尹喜爱 李红喜 樊彬[1] 赵文玉[1] Wen Huixia;Yin Xiai;Li Hongxi;Fan Bin;Zhao Wenyu(Chemistry and Chemical Engineering School,Inner Mongolia University of Science and Technology,Baotou 014010)

机构地区：[1]内蒙古科技大学化学与化工学院,包头014010

出　　处：《化工新型材料》2020年第8期190-193,共4页New Chemical Materials

基　　金：内蒙古自然科学基金项目(2018MS02002)。

摘　　要：采用传统高温固相法在较低温度下制备Sm^3+离子掺杂Sr3MgSi2O8橙红色荧光粉,研究了Sr3-xMgSi2O8∶x%Sm^3+的晶体结构和发光性能。激发和发射光谱表明,样品可被近紫外350~420nm波段激发,最强激发峰位于402nm处,发射光谱呈现出Sm^3+的特征橙红色,谱带峰值分别在563nm、601nm、644nm,对应于4G5/2→^6H5/2、4G5/2→^6H7/2和4G5/2→^6H9/2特征跃迁。最强发射对应的掺杂浓度为5%(摩尔分数,下同),浓度猝灭的发生主要是因为非辐射荧光粉中Sm^3+离子之间的能量转移。浓度为5%的CIE坐标为(0.5548,0.4366)最接近橙红色,获得极佳的演色性。样品Sr3-xMgSi2O8∶x%Sm^3+荧光粉是一种具有应用潜力的近紫外激发三基色白光LED用橙红色荧光粉。The Sm^3+ion-doped Sr3MgSi2O8 orange-red phosphor was prepared at a lower temperature by conventional high-temperature solid-phase method.The crystal structure and luminescence properties of Sr3-xMgSi2O8∶x%Sm^3+were studied.The excitation and emission spectra shown that the sample can be excited by the nearultraviolet 350~420 nm band,and the strongest excitation peak was located at 402 nm.The emission spectrum exhibited characteristic orange-red emission of Sm^3+,and the peak positions of the bands were at 563 nm,601 nm and 644 nm.Corresponding to 4G5/2→^6H5/2,4G5/2→^6H7/2 and 4G5/2→^6H9/2 characteristic transitions,respectively.The results shown that the doping concentration corresponding to the strongest emission was 5%,and the CIE coordinate was(0.5548,0.4366),which was closest to orange-red color,and obtained a lower color temperature and excellent color rendering.The sample Sr3-xMgSi2O8∶x%Sm^3+phosphor was an orange-red phosphor for near-ultraviolet excitation trichromatic white LED with potential application.

关 键 词：橙红色荧光粉 Sm^3+掺杂 高温固相法 白光LED 

分 类 号：O482.31[理学—固体物理]