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Acta Phys. Chim. Sin.  2013, Vol. 29 Issue (10): 2271-2275    DOI: 10.3866/PKU.WHXB201307162
PHOTOCHEMISTRY AND RADIATION CHEMISTRY     
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
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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 wordsCa9La(PO4)7:Dy3+      Phosphors      High temperature solid state reaction      Luminescence property      concentration quenching     
Received: 09 May 2013      Published: 16 July 2013
MSC2000:  O649  
  O644  
Fund:  

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).

Corresponding Authors: HU Zheng-Fa, ZHANG Wei     E-mail: zhfhu@gdut.edu.cn; weizh55@gdut.edu.cn
Cite this article:

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. Acta Phys. Chim. Sin., 2013, 29(10): 2271-2275.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB201307162     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2013/V29/I10/2271

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