Zn2SiO4:Mn2+, Zn2SiO4:Mn3+, and Zn2SiO4:Mn2+, Eu3+ phosphors were prepared by a sol-gel process and their luminescence spectra were investigated. The emission bands from intra-ion transitions of Mn2+ and Eu3+ samples were studied as a function of pressure. The pressure coefficient of Mn2+ emission was found to be -25.3±0.5 and -28.5±0.9 neV/GPa for Zn2SiO4:Mn2+ and Zn2SiO4:Mn2+, Eu3+, emission shows only weak pressure dependence. The pressure dependences of the Mn2+ and Eu3+ emissions in Zn2SiO4:Mn2+, Eu3+ are slightly different from that in Zn2SiO4:Mn2+ and Zn2SiO4:Mn3+ samples, which can be attributed to the co-doping of Mn2+ and Eu3+ ions. The Mn2+ emission in the two samples, however, exhibits analogous temperature dependence and similar luminescence lifetimes, indicating no energy transfer from Mn2+ to Eu3+ occurs.
Revised: January 11, 2006 |
Published: January 1, 2006
Citation
Su F., B. Ma, K. Ding, G. Li, S. Wang, W. Chen, and A.G. Joly, et al. 2006.Luminescence Temperature and Pressure Studies of Zn2SiO4 Phosphors Doped with Mn2+ and Eu3+ Ions.Journal of Luminescence 116, no. 1-2:117-126.PNNL-SA-44672.