A novel red phosphor Ba2La4Y4(SiO4)(6)O-2:Eu3 with high quantum yield and thermal stability for warm white LEDs
A novel red phosphor Ba2La4Y4(SiO4)(6)O-2:Eu3 with high quantum yield and thermal stability for warm white LEDs
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一种用于暖白光 LED 的具有高量子产率和热稳定性的新型红色荧光粉 Ba2La4Y4(SiO4)(6)O-2:Eu3
DOI：
10.1016/j.jallcom.2019.02.229
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发表时间：
2019
影响因子：
6.2
通讯作者：
Wang Lianjun
中科院分区：
文献类型：
--
作者：
Wang Sanhai;Xu Yanqiao;Chen Ting;Jiang Weihui;Liu Jianmin;Zhang Xin;Jiang Wan;Wang Lianjun
采用固相反应法制备了新型硅酸盐氧化磷灰石红色荧光粉Ba2La4Y4(SiO4)6O2：Eu3+。结果表明，Eu~(3+)离子取代La~(3+)离子可以产生比Y~(3+)离子更高的发光强度。此外，通过调节Y3+离子和La3+离子的相对含量，Ba2La4Y4(SiO4)6O2：Eu3+显示出高的量子产率和高的热稳定性(在125 °C时发光强度保持94.1%，在150 °C时保持77.6%)。最后，将Ba2Y4La4(SiO4)6O2：Eu3+红色荧光粉与BaMgAl10O17：Eu2+蓝色荧光粉在395 nm紫外光下混合使用，得到了CCT值为3306 K、发光效率为33.55 lm/W、Ra为91的温白光LED。结果表明，Ba2Y4La4(SiO4)6O2：Eu3+红色荧光粉可以作为高性能大功率温白光LED的潜在近紫外激发红色荧光粉。
A novel silicate oxyapatite red phosphor Ba2La4Y4(SiO4)6O2:Eu3+was synthesized by solid state reaction method. The results show that Eu3+ions replace La3+ions can lead to higher luminescence intensity than replacing Y3+ions. Moreover, Ba2La4Y4(SiO4)6O2:Eu3+shows a high quantum yield of 67.46% and high thermal stability (the luminescence intensity remains 94.1% of its initial PL intensity at 125 °C, and maintains 77.6% at 150 °C) by regulating the relative content of Y3+ions and La3+ions. Finally, a warm white LED with low CCT of 3306 K, high luminous efficiency of 33.55 lm/W and Ra of 91 was achieved by combining Ba2Y4La4(SiO4)6O2:Eu3+red phosphor with BaMgAl10O17:Eu2+blue phosphor and (Sr, Ba)2SiO4:Eu2+green phosphor under 395 nm NUV chips. All the results manifest that the red phosphor Ba2Y4La4(SiO4)6O2:Eu3+can be used as a potential NUV-excited red phosphor for high-performance high-power warm white LEDs.