Doping optimization of Eu and Ho activator ions in polycrystalline CaAl2O4

Synthesis and photoluminescence characteristics of Dy3+ doped NaY(WO4)2 phosphors

“…Many inorganic compounds such as molybates [6,7], tungstates [8,9], vanadates [10,11] and aluminates [12,13] doped with RE 3+ ions were extensively studied due to their broad charge-transfer absorption bands in the near-UV and transferring the absorbed energy to the activator-RE 3+ ions. As one of the activator ions in phosphors, trivalent dysprosium ion (Dy 3+ ) has attracted significant attention and been investigated as activator dopants in many inorganic hosts [14,15].…”

Synthesis and photoluminescence of Tb3+ Activated NaY(WO4)2 phosphors

“…Among these applications, white lightemitting diodes (w-LEDs) have particularly attracted great interest because of their advantages of long lifetime, low energy consumption, high light output yield, and environmental-friendly characteristics [6]. Nowadays, many inorganic compounds such as molybdates [7,8], tungstates [9,10], vanadates [11,12] and aluminates [13,14] doped with RE 3+ ions were extensively studied due to their broad charge-transfer absorption bands in the near-UV and transferring the absorbed energy to the activator-RE 3+ ions.…”

Effects of Sm Co-doping on Luminescent Properties of Sr4Al14O25:M (M=Mn4+, Cr3+) Phosphors

“…However, the color rendering index of YAG:Ce phosphor for W-LEDs is too low to be used in warm white LEDs because of lacking a red component (color rendering index (CRI≤85)) [1]. Recently, the rare earth ionsdoped alkali earth aluminates have attracted much attention owing to their high luminescence in blue green to red regions [2,3], which have been widely used in the illumination, medical instruments, displays, etc. Nowadays, the most used activators in the red emitting phosphors are Eu 2+ and Eu 3+ , followed by Ce 3+ and Sm 3+ etc.…”