Embodiment and Luminescence Properties of Sr3SiO5:Eu(Yellow-Orange Phosphor) by Co-Doping Lanthanide

We have synthesized a Eu2+-activated lanthanide co-doped Sr3SiO5 : Eu yellow-orange phosphor. In this experiment, sample powder has been synthesized by conventional solid state method. It was calculated that luminescent efficiency of a Gd3+ co-doped Sr3SiO5:Eu phosphor sample is up to 105% than that of only Sr3SiO5:Eu phosphor. Those samples can be applied such as phosphor for white LED lamps through integrating on the UV or blue chips. On the contrary, the use of a Dy, Ce, Pr and lanthanide short of Gd by the co-doping materials was caused by decreasing luminescent intensity. The emission band was shifted from 572nm to short wavelengths by co-doping lanthanide. The emission band of a Nd3+ co-doped Sr3SiO5 : Eu phosphor sample was not symmetrical at 570nm. As Nd3+ concentration increased, two emission bands were observed

THE DETERIORATION DEPTH IN ZnS:Ag UNDER PROLONGED BOMBARDMENT BY HEAVY IONS

Local regions on a ZnS:Ag phosphor sample were bombarded by a large number (~1014 per cm2) of heavy ions. This irradiation damaged the phosphor to various depths which depended on the energy of the deteriorating ions. These depths were determined by measuring the energy loss of energetic hydrogen projectiles as they passed through the damaged phosphor regions. It was found that the deterioration depths increase approximately as the square root of the incident energy and for the heavier projectiles (40Ar and 84Kr) these depths are about an order of magnitude larger than the corresponding ranges predicted by the Lindhard theory. No direct correlation, however, between the deterioration depth and the range of the heavier ions is implied.

THE IONOLUMINESCENCE OF Zn2SiO4:Mn UNDER NEGATIVE AND MOLECULAR ION BOMBARDMENT

A Zn2SiO4:Mn phosphor sample was bombarded by H+, H−, O−, O+, O2+, and O2− ions. In the energy range studied (10 < E < 90 keV), the ionoluminescence intensity was independent of the charge on the ion at the moment of impact. When the phosphor was bombarded by a molecular ion (H2, N2, O2, or CO2), the light output was less than the sum of the light outputs of the atomic constituents of the molecule at the same velocity.