Preparation of CaMgSi2O6:Eu blue phosphor particles by spray pyrolysis and its VUV characteristics

Luminescence properties of Ca10K(PO4)7:RE3+ (RE=Ce, Tb, Dy, Tm and Sm) under vacuum ultraviolet excitation

“…Recently, BaMgAl 10 O 17 :Eu 2+ (BAM), Zn 2 SiO 4 :Mn 2+ and (Y, Gd)BO 3 :Eu 3+ have been commercially used as blue, green and red phosphors for PDPs, respectively. Among these phosphors, BAM is easily degraded by a thermal treatment in the presence of oxygen during panel fabrication and VUV damage during panel operation [6]; the decay time of the Zn 2 SiO 4 :Mn 2+ phosphor is too long resulting in that one image could be superimposed on another [7]; the red phosphor exhibits a poor color purity, because the intensity of the orange emission is higher than that of the red one [8]. Hence, new phosphors with good characteristics such as intensive emission upon 147/172 nm excitation are imperatively needed.…”

Photoluminescence of Eu2+-doped CaMgSi2xO6+2x (1.00⩽x⩽1.20) phosphors in UV–VUV region

“…3, respectively. We ascribe the excitation 200-450 nm to the crystal-field splitting of Eu 2+ 4f 7 ( 8 S 7/2 )-4f 6 5d( 7 F J ) transition according to the assignment in other Eu 2+ -doped systems [10,12]. The emission spectrum shows the maximum intensity at about l=453 nm, which is due to the 4f-5d transition of Eu 2+ .…”

“…[12], Jung et al achieved blue phosphor CaMgSi 2 O 6 :Eu 27 and the result was interesting, the luminous intensity was gradually decreased with increasing Si excess under VUV excitation. It is one of our aims to study in detail the effect of excess Si on the PL properties in CaMgSi 2 O 6 :Eu 2+ .…”

“…CaMgSi 2 O 6 doped with rare-earth and transition-metal ion phosphors have been studied by some researchers [8][9][10][11][12]. Among these studies, Kunimoto et al have prepared blue-emitting phosphor CaMgSi 2 O 6 :Eu 2+ with Si-rich mixture and it was concluded that the PL intensity under vacuum ultraviolet (VUV) excitation was enhanced with excess SiO 2 [11].…”

Blue luminescence of nanocrystalline CaZrO3:Tm phosphors synthesized by a modified Pechini sol–gel method

“…But there are some related researches that indicated that BAM:Eu still has some drawbacks [3,4]. For example, BAM:Eu significantly loses the radiation efficiency, and simultaneously accompanies a color shift during the thermal treatment at the temperature of 450-550 1C [5,6]. With a motivation to develop a new blue phosphor, many investigations have been done on Tm 3+ -activated oxides, because Tm 3+ can provide blue luminescence and can be doped at a high concentration [7][8][9][10][11].…”