Synthesis and Luminescence Properties of SrMoO4:RE3+ (RE = Eu or Tb) Phosphors

다국어 초록 (Multilingual Abstract)

SrMoO4:RE3+ (RE = Eu or Tb) phosphors were synthesized with different concentrations of activatorions by using the conventional solid-state reaction method. The effects of the concentrationof activator ions on the structural, morphological, and optical properties of strontium molybdatephosphors were investigated by using X-ray diffraction, scanning electron microscopy, and fluorescencespectrophotometry, respectively. XRD patterns revealed that all synthesized phosphorsshowed the tetragonal SrMoO4 structure, irrespective of the type and the concentration of activatorions. The crystallite size showed an overall increasing tendency with increasing concentrationof activator ions. The emission spectra of Eu3+-doped SrMoO4 phosphors under excitation at 295nm exhibited one intense red band at 619 nm and five weak bands centered at 541, 561, 596, 657,and 704 nm, respectively. For the Tb3+-doped SrMoO4 phosphors, a strong emission peak at 550nm and two weak lines, 494 and 591 nm, were observed. The intensities of all the emission bandsreached maxima when 0.05 mol of Tb3+ ions was used. The results suggest that the optimumconcentrations for synthesizing highly-luminescent red and green phosphors are 0.01 mol and 0.05mol, respectively.

참고문헌 (Reference)

1 Y. Guo, 530 : 116-, 2012

2 Y. H. Wang, 41 : 1571-, 2006

3 C. Cui, 255 : 3463-, 2008

4 X. Ju, 77 : 35-, 2012

5 R. Vali, 50 : 2683-, 2011

6 X. Xiao, 176 : 72-, 2011

7 X. Lin, 13 : 579-, 2011

8 Y. Sun, 14 : 1221-, 2011

9 Y. Zhang, 133 : 759-, 2005

10 W. Jia, 23 : 27-, 2003

11 Y. F. Liu, 221 : 412-, 2012

12 G. Z. Li, 6 : 1416-, 2006

13 C. H. Kam, 54 : 337-, 2002

14 Y. Ruan, 25 : 122-, 2007

15 X. Li, 25 : 706-, 2007

16 J. B. Gruber, 110 : 023104-, 2011

17 Jigang Yin, "Ab initio calculations of electronic structures of SrMoO4 crystals containing F and F+ color centers" 한국물리학회 9 (9): 1237-1240, 2009

18 Shuo Li, "A new red-emitting phosphor of Eu3+-doped Sr2MgMoxW1−xO6 for solid state lighting" 한국물리학회 13 (13): 1288-1291, 2013