Luminescent studies of impurity doped SrS phosphors

摘要

SrS phosphors activated with Ce and By ions were prepared by solid-state diffusion method. Photoiuminescent study was carried out on SrS : Ce, SrS : Dy and SrS : Dy, Ce. Thermoluminescence and electron spin resonance studies were also carried out on SrS : Dy phosphor. The thermoluminescence glow curve shows a peak at around 142X. Irradiated SrS : Dy exhibits an ESR line due to a defect centre. Thermal annealing behaviour indicates that this centre correlates with the TL peak at 142 deg C. The centre is characterized by an isotropic g-valnt of 2-0039 and is assigned to a F~+ centre.