To investigate the mechanism of the killer effect of iron group ions (M 2+ ) on the green luminescence in ZnS:Cu, Al phosphors, the dependences of the intensity and decay rate of the green luminescence on the M 2+ concentrations, the relation of the green luminescence intensity vs. excitation intensity, and some other related optical properties are measured. It is concluded, together with some theoretical calculations, that the killer effect of Mn 2+ ion is mostly due, especially at low temperatures, to the resonance energy transfer. In the cases of Fe 2+ , Ni 2+ , and Co 2+ ions, it is concluded that the killer effect is caused not only by the energy transfer but also by the bypassing process via deep levels created by these ions, and that the effect due to the bypassing process is enhanced with increasing temperature.
No takes yet. Share an insight, caveat, or question.
Tabei et al. (1975) studied this question.