Luminescence properties of Eu2+-activated Ca12Al10.6Si3.4O32Cl5.4: A promising phosphor for solid state lighting

Abstract In this article, we synthesized and characterized a novel bluish green phosphor for white light-emitting diodes, Eu 2+ -activated Ca 12 Al 10.6 Si 3.4 O 32 Cl 5.4 . The phosphor shows broad and strong absorption in the region (320–450 nm), which is essential for improving the efficiency and quality of white light-emitting diodes. When excited at 380 nm, the phosphor shows two emission bands at around 425 and 500 nm. The main emission peak of Eu 2+ -activated Ca 12 Al 10.6 Si 3.4 O 32 Cl 5.4 exhibits red shift in comparison with that of Eu 2+ -activated Ca 12 Al 14 O 33 , which is due to the introduction of Si and Cl ions. The results show Ca 12 Al 10.6 Si 3.4 O 32 Cl 5.4 is a promising host candidate for the phosphors.