FLUORESCENCE-SPECTRA OF TB3-DOPED POWDER PHOSPHORS()

This research note brings out the methods of preparation and the fluor escence spectral properties of TbCl3 and TbF3 (0.1 M%) doped CaS, LaOC l, LaOF, YOCI and YOF powder phosphors. By UV radiation excitation the se phosphors have displayed green emission of varied intensity, depend ing on both the host as well as the dopant ligands in the samples stud ied. Certain emission levels of these phosphors have been characterize d by evaluating their stimulated emission cross-sections to understand the host environmental effects on their fluorescence behaviours.