Skip to main content
Article
Color Tuning of (K1−x,Nax)SrPO4:0.005Eu2+, yTb3+ Blue-Emitting Phosphors via Crystal Field Modulation and Energy Transfer
Journal of Materials Chemistry C
  • Pengpeng Dai, Northeast Normal University
  • Xintong Zhang, Northeast Normal University
  • Lulu Bian, Northeast Normal University
  • Shan Lu, Northeast Normal University
  • Yichun Liu, Northeast Normal University
  • Xiao-Jun Wang, Georgia Southern University
Document Type
Article
Publication Date
1-1-2013
DOI
10.1039/C3TC30128A
Disciplines
Abstract
Two series of K1−xNaxSrPO4:0.005Eu2+ and K0.4Na0.6Sr0.995−yPO4:0.005Eu2+, yTb3+ phosphors are synthesized via a high-temperature solid-state reaction. Their emission color can be tuned from deep blue to blue–green by modulating the crystal field strength and energy transfer. Partial substitution of K+ with Na+ results in a contraction and distortion of the unit cell of the K1−xNaxSr0.995PO4:0.005Eu2+ host, tuning the emission from 426 to 498 nm. The red-shifted emission is attributed to an increased crystal field splitting for Eu2+ in a lowered symmetry crystal field. The tunable emission is further demonstrated in the cathodoluminescence spectra, which indicates that the luminescence distribution of the K1−xNaxSr0.995PO4:0.005Eu2+ phosphor is very homogenous. Additionally, utilizing the principle of energy transfer, the emission color can be further tuned by co-doping with Tb3+. The chromaticity coordinates for the co-doped phosphor, K0.4Na0.6Sr0.995−yPO4:0.005Eu2+, yTb3+, can be adjusted from (0.202, 0.406) for y = 0 to (0.232, 0.420) for y = 0.09. The energy transfer processes from the sensitizer (Eu2+) to the activator (Tb3+) are studied and demonstrated to have a resonance-type dipole–dipole interaction mechanism, with the critical distance of the energy transfer calculated to be 12.46 Å using a concentration quenching method.
Comments

RSC Publishing allows for authors to make available the PDF of the final published article via the personal website(s) of the author(s) or via the Intranet(s) of the organisation(s) where the author(s) work(s). Article obtained Journal of Materials Chemistry.

Citation Information
Pengpeng Dai, Xintong Zhang, Lulu Bian, Shan Lu, et al.. "Color Tuning of (K1−x,Nax)SrPO4:0.005Eu2+, yTb3+ Blue-Emitting Phosphors via Crystal Field Modulation and Energy Transfer" Journal of Materials Chemistry C Vol. 1 Iss. 30 (2013) p. 4570 - 4576
Available at: http://works.bepress.com/xiao-jun_wang/32/