Preparation of Sr2Si5N8:Eu2+ for white light-emitting diodes by multi-step heat treatment

A new yellowish-green-emitting phosphor: Eu2+-doped K4CaSi3O9

“…In recent years, Eu 2+ -doped phosphors have been paid great attentions due to the significant applications as phosphors in white light-emitting diodes (W-LEDs), for example, the nitrides and oxynitrides-based compounds have been demonstrated to be excellent for W-LEDs application [8][9][10][11]. However, the very high firing temperatures and high nitrogen pressures are required for their synthesis, resulting in higher production cost.…”

The thermal stability and structural site-distribution of Eu3+ ions in the red-emitting phosphors Ca9Eu2W4O24 and Sr9Eu2W4O24

“…There have been extensive studies on new phosphors for W-LEDs [3][4][5][6][7][8][9][10]. In particular Eu 3+ -doped oxyacid materials such as tungstates [11], silicates [14], vanadates [15], borates [16] and phosphates [11][12][13][14][15][16][17] have been investigated for red emitting phosphors.…”

MSi2O2−δN2+2/3δ:Eu (M=Sr, Ba) phosphors for field emission displays

“…They are promising candidates for white light-emitting diodes (LEDs). Representative candidates are Sr 2 Si 5 N 8 :Eu 2+ (red) [8,9], CaAlSiN 3 :Ce 3+ [10,11], Ca-␣-Sialon:Eu 2+ (Ca (m/2)−x Eu x Si 12−m−n Al m+n O n N 16−n ) [12], ␤-Sialon:Eu 2+ (Si 6−z Al z O z N 8−z , 0 < z ≤ 4.2) [13], MSi 2 O 2−ı N 2+2/3ı (M = Ca, Sr, Ba):Eu 2+ [14], and Sr-Sialon:Eu 2+ (blue to yellow) [15]. Among these phosphors, MSi 2 O 2−ı N 2+2/3ı (M = Ca, Sr, Ba):Eu 2+ was reported to have efficient cyan or green emission.…”