Novel high-brightness and thermal-stable Ca3Gd(AlO)3(BO3)4:Eu3+ red phosphors with high colour purity for NUV-pumped white LEDs
Novel high-brightness and thermal-stable Ca3Gd(AlO)3(BO3)4:Eu3+ red phosphors with high colour purity for NUV-pumped white LEDs
复制标题
DOI：
10.1016/j.dyepig.2018.03.005
复制
发表时间：
2018-07-01
影响因子：
4.5
通讯作者：
Huang, Xiaoyong
中科院分区：
文献类型：
--
作者：
Li, Bin;Wang, Shaoying;Huang, Xiaoyong
采用固相反应法首次合成了新型高亮度Ca 3Gd（AlO）（3）（BO 3）（4）：Eu 3+红色荧光粉，并对其光致发光性能进行了研究。在397 nm激发下，Ca 3 Gd（AlO）（3）（B-3）（4）：Eu 3+荧光粉具有较强的红光发射。在Ca 3Gd（AlO）（3）（B-3）（4）中，Eu 3+离子的最佳掺杂浓度高达50 mol%，相应的内量子效率为90%。Ca 3Gd（AlO）（3）（B-3）（4）：0.5Eu（3+）样品的CIE色坐标[（0.654，0.343）]非常接近理想的红光[（0.670，0.330）]。同时计算出Ca_3Gd（Al O）（3）（B-3）（4）：0.5Eu（3+）的色纯度为94%。这些荧光粉在高温下也具有良好的热稳定性，在423 K下的发光强度约为303 K下的84%。制作的原型LED器件具有BaMgAl 10 O 7：Eu 2+蓝色荧光粉、（Ba，Sr）（2）SiO 4：Eu 2+绿色荧光粉、Ca 3 Gd 0.（5）（AlO）（3）（B-3）（4）：0.5Eu（3+）红色荧光粉和395 nm发光InGaN芯片显示出明亮的白色光。研究表明，Ca_3Gd_（0.5）（Al O）（3）（B-3）（4）：0.5Eu（3+）可作为白色LED的红色荧光粉。
Novel high-brightness Ca3Gd(AlO)(3)(BO3)(4):Eu3+ red phosphors were successfully fabricated by the solid-state reaction method for the first time and their photoluminescence properties were investigated. The Ca3Gd(AlO)(3)(B-3)(4):Eu3+ phosphors showed intense red emissions under 397 nm excitation. The optimal doping concentration of Eu3+ ions in the Ca3Gd(AlO)(3)(B-3)(4) reached as high as 50 mol%, and the corresponding internal quantum efficiency was measured to be 90%. The CIE chromaticity coordinate [(0.654, 0.343)] of Ca3Gd(AlO)(3)(B-3)(4):0.5Eu(3+) sample was very close to the ideal red light [(0.670, 0.330)]. Meanwhile, the colour purity of Ca3Gd(AlO)(3)(B-3)(4):0.5Eu(3+) was calculated to be 94%. These phosphors also possessed good thermal stability at high temperature, and the emission intensity at 423 K was about 84% of that at 303 K. The fabricated prototype LED device with BaMgAl10O7:Eu2+ blue phosphors, (Ba,Sr)(2)SiO4:Eu2+ green phosphors, Ca3Gd0.(5)(AlO)(3)(B-3)(4):0.5Eu(3+) red phosphors and 395 nm-emitting InGaN chip exhibited bright white light. The current study presents that Ca3Gd0.5(AlO)(3)(B-3)(4):0.5Eu(3+) can be used as a red phosphor for white LEDs.