Ce3+ doped BaLu2Al2Ga2SiO12 — A novel blue-light excitable cyanemitting phosphor with ultra-high quantum efficiency and excellent stability for full-spectrum white LEDs
Ce3+ doped BaLu2Al2Ga2SiO12 — A novel blue-light excitable cyanemitting phosphor with ultra-high quantum efficiency and excellent stability for full-spectrum white LEDs
复制标题
Ce3 掺杂 BaLu2Al2Ga2SiO12 — 一种新型蓝光激发青色荧光粉，具有超高量子效率和优异的稳定性，适用于全光谱白光 LED
DOI：
10.1016/j.jre.2020.09.015
复制
发表时间：
2021
影响因子：
4.9
通讯作者：
Ye Xinyu
中科院分区：
文献类型：
--
作者：
Liang Mingzhang;Xu Jianfei;Qiang Yaochun;Kang Haojian;Zhang Lulu;Chen Jie;Liu Chun;Luo Xianbi;Li Ying;Zhang Jingjing;Ouyang Liqing;You Weixiong;Ye Xinyu
It is well known that cyan-emitting phosphors play a very important role in full-spectrum white LEDs. A large number of cyan-emitting phosphors have been reported in the past few years, however, most of them can only be effectively excited by near-ultraviolet light. There are very few cyan-emitting phosphors that can be intensively excited by blue light (440 and 470 nm). Here, a novel blue-light excitable cyan-emitting phosphor BaLu_(1.95)Ce_(0.05)Al_2Ga_2SiO_(12) with excellent performance is reported. The cyan phosphor has a cubic structure in space group Ia_3d with a = 1.205379(3) nm, which can be easily obtained through a solid-state reaction pathway. The emission peak of the cyan phosphor is located at 500 nm and its internal quantum efficiency is as high as 90.01% when excited at 455 nm at 25 ℃. The cyan phosphor exhibits superior resistance against thermal quenching of luminescence, and its intensity at 125 0C is as strong as 92.14% of the intensity at room temperature. Meanwhile, it also shows an outstanding resistance against water, where its luminescence intensity is hardly changed after being immersed in pure water for 528 h. The white LED lamp prepared by employing the obtained BaLu_(1.95)-Ce_(0.05)Al_2Ga_2SiO_(12) as cyan phosphor displays remarkable optical properties with CCT = 4441 K, Ra = 93.7,CRI = 90.4 and CIE 1931 (x, y) as (x = 0.3648, y = 0.3752). The experimental results demonstrate that BaLu_(1.95)Ce_(0.05)Al_2Ga_2SiO_(12) is a promising cyan-emitting phosphor with great application potential in fullspectrum white LEDs.
