近紫外激发颜色可调的Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12):Dy^(3+)/Tm^(3+)荧光粉制备及其性能研究  

Preparation and Luminescent Properties of Near-Ultraviolet Excited Color Tunable

作　　者：刘杨 李锦洋 岳浩东 游维雄[1,2] 黄建辉 Liu Yang;Li Jinyang;Yue Haodong;You Weixiong;Huang Jianhui(Rare Earth Institute,Jiangxi University of Science and Technology,Ganzhou 341000,China;Rare Earth Functional Material Innovation Center,Ganzhou 341000,China)

机构地区：[1]江西理工大学稀土学院,江西赣州341000 [2]国家稀土功能材料创新中心,江西赣州341000

出　　处：《中国稀土学报》2025年第1期57-68,共12页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(61905099,12264021);江西省自然科学基金项目(20202BAB212009);江西省教育厅项目(GJJ200844)资助。

摘　　要：稀土发光材料广泛应用于照明发光、生物化学、医疗诊断等领域。本文通过高温固相法合成了一系列稀土离子掺杂荧光粉:Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12):xDy^(3+)(x=0.02,0.03,0.04,0.05,0.06, 0.07)和Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12):xDy^(3+)/yTm^(3+)(y=0.02,0.03,0.04,0.05,0.06, 0.07,0.08)。通过测试样品的XRD和荧光光谱对样品的物相、结构及性能进行表征,分析研究了稀土离子间的能量传递过程和CIE色坐标。结果表明:Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12):xDy^(3+)在监测波长为579 nm下时的最佳激发波长为352 nm;用352 nm激发时荧光粉主要发黄光,Dy^(3+)的最佳掺杂浓度为0.05(摩尔分数);在Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12):xDy^(3+)/yTm^(3+)荧光粉中,选取355和366 nm作为激发波长,通过调控Tm^(3+)离子的掺杂浓度,可以实现荧光强度和发光颜色的调节,同时可实现白光发射;在激发波长为366 nm激发下,当Dy^(3+)/Tm^(3+)的掺杂浓度比为0.05/0.06时,Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12):0.05Dy^(3+)/0.06Tm^(3+)荧光粉的CIE色坐标为(0.3448, 0.3216),最接近标准白光点(0.333, 0.333)。实验结果表明,Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12):Dy^(3+)/Tm^(3+)荧光粉可作为近紫外光激发单一基质白光荧光粉。Rare earth luminescent materials are widely used in fields such as lighting luminescence, biochemistry, and medical diagnosis. This paper synthesized a series of rare earth ion doped fluorescent powders: Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12): xDy^(3+)(x=0.02, 0.03, 0.04, 0.05, 0.06, 0.07) and Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12): xDy^(3+)/yTm^(3+)(y=0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08) through high-temperature solid-state method. The phase, structure, and properties of the samples were characterized by X-ray diffraction(XRD) and fluorescence spectra, and the energy transfer process and CIE color coordinates between rare earth ions were analyzed and studied. The results show that the optimal excitation wavelength of Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12): xDy^(3+) at a monitoring wavelength of 579 nm is 352 nm;When excited at 352 nm, the fluorescent powder mainly emits yellow light, and the optimal doping concentration of Dy^(3+) is 0.05. In Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12): xDy^(3+)/yTm^(3+) phosphors, by adjusting the doping concentration of Tm^(3+) ions, the fluorescence intensity and color can be adjusted, and white light emission can be achieved selected 355 and 366 nm as excitation wavelengths. When the doping concentration ratio of Dy^(3+)/Tm^(3+) ions is 0.05/0.06 at an excitation wavelength of 366 nm, the CIE color coordinates of Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12): 0.05Dy^(3+)/0.06Tm^(3+) phosphors are(0.3448, 0.3216), which is closest to the standard white light point(0.333, 0.333). The experimental results indicate that Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12): Dy^(3+)/Tm^(3+)phosphor can be used as a single substrate white light phosphor excited by near-ultraviolet light.

关 键 词：镝/铥离子共掺杂 石榴石结构 光谱性能 

分 类 号：O482.31[理学—固体物理] TQ422[理学—物理]