Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 154, Issue -, Pages 72-75Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2015.10.026
Keywords
Phosphor; Photoluminescence; Solid-state reaction method; Charge compensation; ZnWO4; Pi(3+); Li+
Categories
Funding
- National Science Foundation of China [11104366]
- Chinese Ministry of Education [212139]
- Chongqing University of Technology [YCX2014219]
Ask authors/readers for more resources
Zn0.997WO4: Pr-0.003(3+) and different concentrations (0.1 mol% to 0.9 mol%) of Pr, Li co-doped ZnWO4 red phosphors were prepared by means of solid-state reaction process. The crystalline, surface morphology and luminescent properties of Zn0.997WO4: Pr-0.003(3+) and Zn1-x-yWO4: xPr(3+), yLi(+) phosphors were investigated by the X-ray diffraction patterns (XRD), scanning electron microscope (SEM) and fluorescent measurements. From powder XRD analysis, the formation of monoclinic structure with C-2/h point-group symmetry and P-2/c space group of the as-synthesized samples is confirmed. The SEM image showed that surface morphology of the phosphor powder is irregular cylindricality. The luminescent spectra are dominated by the red emission peaks at 607, 621 and 643 nm, respectively, radiated from the D-1(2)-> H-3(4), P-3(0)-> H-3(6) and P-3(0)-> F-3(2) transitions of Pr3+ ions. The concentrations of the highest luminescent intensity is determined at 0.3 mol% P3+ and 03 mol% Li co-doped ZnWO4 powder crystal, and the peak intensity is improved more than 3 times in comparison with that of 03 mol% Pr3+ single-doped ZnWO4. The enhanced luminescence comes from the improved crystalline and from the charge compensation of Li+ ions. The decay curve and CIE chromaticity coordinates of as-prepared samples are also studied in detail. (C) 2015 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available