Solid-state reaction synthesis and luminescent properties of (Sr(1−y)La2y/3)(1−x)MoO4:xDy3+ phosphors

• Published in: Journal of materials science. Materials in electronics Vol. 28; no. 21; pp. 16321 - 16328
• Main Authors: Wu, Dong-ni, Deng, Chao-yong
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.11.2017; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Chromaticity; Crystal structure; Emission spectra; Excitation spectra; Grain size; Light emitting diodes; Materials Science; Optical and Electronic Materials; Optical properties; Phosphors; Photoluminescence; Reaction synthesis; Scheelite; Solid state; X-ray diffraction
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-017-7538-6

A series of novel Sr 1− x MoO 4 : x Dy 3+ (0.005 ≤  x  ≤ 0.05) and (Sr (1− y ) La 2 y /3 ) 0.98 MoO 4 :0.02D y 3+ (0.01 ≤  y  ≤ 0.07) yellow phosphors were synthesized through the solid state reaction at 750 °C for 6 h. The properties were characterized via X-ray diffraction (XRD) and photoluminescence spectra. The SrMoO 4 phases with the scheelite structure were confirmed by XRD. Luminescent properties of the obtained Sr 1− x MoO 4 : x Dy 3+ (0.005 ≤  x  ≤ 0.05) and (Sr (1− y ) La 2 y /3 ) 0.98 MoO 4 :0.02D y 3+ (0.01 ≤  y  ≤ 0.07) phosphors were characterized. The results indicated that the excited spectra have intense excitation at ( 6 H 15/2 – 6 P 7/2 ) 352 nm and ( 6 H 15/2  →  4 I 13/2 ) 388 nm, and meanwhile the emission spectra exhibited the most intense emission at ( 4 F 9/2  →  6 H 15/2 ) 485 nm and ( 4 F 9/2  →  6 H 13/2 ) 573 nm. Additionally, the effect of La 3+ incorporation concentration on the luminescent properties of (Sr (1− y ) La 2 y /3 ) 0.98 MoO 4 :0.02D y 3+ was investigated in detail. Moreover, the CIE chromaticity ( x, y ) of (Sr (1− y ) La 2 y /3 ) 0.98 MoO 4 :0.02D y 3+ excited by 352 nm light was analyzed. When the doping amount of La 3+ is 0.03, phosphors of the samples turned from pink to yellow. The results indicated that the (Sr (1− y ) La 2 y /3 ) 0.98 MoO 4 :0.02D y 3+ is an efficient yellow emitting phosphor and may be applied in the fields of near UV-excited and blue-excited white LEDs.