Author(s)

Fu Dai¹, Wenqing Shi^2*, Donghua Fan¹, Baojian Yang³, Wuchao Huang¹, Lifen Liu¹

¹Department of Applied Physics and Materials, Wuyi University, Jiangmen, China.
²College of Science, Guangdong Ocean University, Zhanjiang, China.
³School of Mechatronic Engineering, Wuyi University, Jiangmen, China.

A series of (SrNa)_2-xEu_x(MoO₄)₃ red phosphors have been synthesized by using the sol-gel method. X-ray diffraction, used to characterize the crystallization process of the phosphor precursors, indicates that the (SrNa)_2-xEu_x(MoO₄)₃ phosphors had an SrMoO₄ structure. The properties of these resulting phosphors have also been characterized by using photoluminescence (PL) spectra. The PL results indicate that all of the (SrNa)_2-xEu_x(MoO₄)₃ phosphors exhibit intense red emissions under 275, 395, and 465-nm excitation. The two strongest lines at 395 and 465 nm in the excitation spectra of these phosphors match well with the two popular emissions from near-UV and blue GaN-based light-emitting diodes. Some process parameters for Eu³⁺ concentration, (C₆H₈O₇)·H₂O concentration, and solution pH value were also investigated. For (SrNa)_2-xEu_x(MoO₄)₃ phosphors, there are two maximum emission intensities appearing with x = 0.6 and x = 1.4, respectively. When the molar ratio of citric acid is equal to that of metal cations and the solution pH is almost 4, (SrNa)_2-xEu_x(MoO₄)₃ shows the strongest emission intensity compared to those under other conditions.

Luminescence, Sol-Gel Process, Complexant, Red Phosphor

Dai, F. , Shi, W. , Fan, D. , Yang, B. , Huang, W. and Liu, L. (2017) Luminescent Properties of (SrNa)_2-x Eu_x(MoO₄)₃ Red Phosphors Prepared by Using the Sol-Gel Process. World Journal of Condensed Matter Physics, 7, 1-10. doi: 10.4236/wjcmp.2017.71001.