FLUORESCENCE-SPECTRA OF SM3-DOPED LANTHANIDE OXYCHLORIDE POWDER PHOSPHORS()

The fluorescence properties of Sm3+-doped LaOCl, GdOCl, YOGl, (La, Gd) OCl, (La, Y)OCl and (Gd, Y)OCl powder phophors are reported. The measu red photoluminescence spectra have been analysed by determining their colour coordinates ((X) over bar, (Y) over bar), the relative fluoresc ence intensity ratios (red/orange) and their stimulated emission cross sections (sigma(P)(E)). These Sm3+-phosphors have displayed bright re ddish-orange colour due to the transitions (4)G(5/2)-->H-6(9/2) (red) and (4)G(5/2)-->H-6(7/2) (orange) under a UV source (150 W xenon are l amp). The LaOCl phosphor could be suggested as a promising material fo r the reddish-orange colour emission for its use on the screens of opt ical electronic systems.