We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effect of charge compensator ion on dysprosium doped di-calcium magnesium di-silicate phosphors.
- Authors
Sahu, Ishwar
- Abstract
In the present article, effect of charge compensator ions (R = Li, Na and K) on dysprosium doped di-calcium magnesium di-silicate (CaMgSiO:Dy) phosphors were investigated. The CaMgSiO:Dy and CaMgSiO:Dy, R (R = Li, Na and K) phosphors were prepared by the traditional high temperature solid state reaction method. The crystal structures of sintered phosphors were an akermanite type structure which belongs to the tetragonal crystallography. Thremoluminescence kinetic parameters such as activation energy ( E), order of kinetics ( b), and the frequency factor ( s) of synthesized phosphors has been calculated by the peak shape method. The prepared CaMgSiO:Dy and CaMgSiO:Dy, R phosphors were excited at 350 nm and their corresponding emission spectrum were recorded at blue (481 nm) and yellow (574 nm) region due to the F → H and F → H transitions respectively of Dy ions. The combination of these two emissions constituted as white light; confirmed by the Commission Internationale de L'Eclairage chromaticity diagram. The possible mechanism of white light emitting CaMgSiO:Dy and CaMgSiO:Dy, R phosphors were also investigated. The addition of charge compensator ions enhances the luminescence intensity of prepared CaMgSiO:Dy phosphors because they neutralize the charge generated by Dy substitution for Ca ions. The role of Li ions among all charge compensator ions (Na or K) used was found to be most effective for enhanced Dy ion emission.
- Subjects
CHARGE conservation; PHYSIOLOGICAL effects of ions; DYSPROSIUM compounds; PHOSPHORS; CRYSTALLOGRAPHY
- Publication
Journal of Materials Science: Materials in Electronics, 2017, Vol 28, Issue 1, p892
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-016-5604-0