Dy3+离子掺杂的全色荧光粉Ca9La(PO4)7的制备及发光特性

doi:10.3866/PKU.WHXB201307162

物理化学学报 >> 2013, Vol. 29 >> Issue (10): 2271-2275.doi: 10.3866/PKU.WHXB201307162

Dy³⁺离子掺杂的全色荧光粉Ca₉La(PO₄)₇的制备及发光特性

胡正发, 孟涛, 张伟, 崔跃鹏, 罗莉, 王银海

广东工业大学物理与光电工程学院, 广州 510006

收稿日期:2013-05-09 修回日期:2013-07-15 发布日期:2013-09-26
通讯作者: 胡正发, 张伟 E-mail:zhfhu@gdut.edu.cn; weizh55@gdut.edu.cn
基金资助:
广东省重大科技专项(2011A080801015); 国家自然科学基金(21271048)和广东省佛山市南海绿色照明专项(A201107)资助

Preparation and Luminescence Properties of Dy³⁺-Doped Full-Color Emitting Ca₉La(PO₄)₇ Phosphors

HU Zheng-Fa, MENG Tao, ZHANG Wei, CUI Yue-Peng, LUO Li, WANG Yin-Hai

School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, P. R. China

Received:2013-05-09 Revised:2013-07-15 Published:2013-09-26
Contact: HU Zheng-Fa, ZHANG Wei E-mail:zhfhu@gdut.edu.cn; weizh55@gdut.edu.cn
Supported by:
The project was supported by the Major Science and Technology Project of Guangdong Province, China (2011A080801015), Nanhai Green Lighting Project of Foshan City, China (A201107), and National Natural Science Foundation of China (21271048).

摘要/Abstract

摘要：

采用高温固相法合成了Ca₉La(PO₄)₇:Dy³⁺发光材料. 荧光粉的晶体结构和微观尺寸由X射线粉末衍射(XRD)仪和扫描电子显微镜(SEM)测定. 光致激发和发射光谱发光揭示了材料的光学特性. 实验结果显示: Ca₉La(PO₄)₇:Dy³⁺能够有效吸收紫外-可见光(300-460 nm)而被激发, 呈现一系列的吸收峰. 样品在350 nm近紫外光激发下, 有较强的蓝光(481 nm)和黄光(573 nm)两个窄带发射, 混合成优质的白光发射, 该白光色坐标在国际照明委员会(CIE)色品图中分布在无色点D65 (0.313, 0329)周围. 随着掺杂Dy³⁺离子的摩尔分数的增加, 两种发射均发生浓度猝灭现象, Dy³⁺离子的最佳掺杂为0.05(摩尔分数), 电偶极-电偶极相互作用是主要的猝灭机理.

关键词: Ca₉La(PO₄)₇:Dy³⁺, 荧光粉, 高温固相反应, 发光特性, 浓度猝灭

Abstract:

Dy³⁺-doped Ca₉La(PO₄)₇ phosphors were synthesized by a high-temperature solid-state reaction. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to determine the crystal structure and size of the prepared materials. Photoluminescence excitation and emission spectra of the Dy³⁺-doped Ca₉La(PO₄)₇:Dy³⁺ phosphors were measured. The samples exhibited a broad absorption band in the range of 300-460 nmand a series of individual absorption peaks of Dy³⁺. Blue (481 nm) and yellow (573 nm) emissions combined to generate the observable white-light emission of the Dy³⁺-doped Ca₉La(PO₄)₇:Dy³⁺ phosphors with suitable Commission Internationale de L'Eclairage (CIE) chromaticity coordinates around the colorless point (0.313, 0.329) when the phosphors were excited at 350 nm. Concentration quenching was clearly observed as the concentration of Dy³⁺ dopant was increased. The most intense emission corresponded to a optimummolar fraction of doped Dy³⁺ ions of 0.05. The mechanismof concentration quenching was dominated by electric dipole?dipole interactions.

Key words: Ca₉La(PO₄)₇:Dy³⁺, Phosphors, High temperature solid state reaction, Luminescence property, concentration quenching

MSC2000:

O649

胡正发, 孟涛, 张伟, 崔跃鹏, 罗莉, 王银海. Dy³⁺离子掺杂的全色荧光粉Ca₉La(PO₄)₇的制备及发光特性[J]. 物理化学学报, 2013, 29(10): 2271-2275.

HU Zheng-Fa, MENG Tao, ZHANG Wei, CUI Yue-Peng, LUO Li, WANG Yin-Hai. Preparation and Luminescence Properties of Dy³⁺-Doped Full-Color Emitting Ca₉La(PO₄)₇ Phosphors[J]. Acta Phys. -Chim. Sin., 2013, 29(10): 2271-2275.

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Dy³⁺离子掺杂的全色荧光粉Ca₉La(PO₄)₇的制备及发光特性

Preparation and Luminescence Properties of Dy³⁺-Doped Full-Color Emitting Ca₉La(PO₄)₇ Phosphors

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