A novel borosilicate glass based PiGs for WLEDs with tunable interface defects and high anti-thermal quenching power
A novel borosilicate glass based PiGs for WLEDs with tunable interface defects and high anti-thermal quenching power
复制标题
一种用于 WLED 的新型硼硅酸盐玻璃 PiG，具有可调界面缺陷和高抗热猝灭能力
DOI：
10.1016/j.optmat.2020.110283
复制
发表时间：
2020-11-01
影响因子：
3.9
通讯作者：
Ma, Teng
中科院分区：
文献类型：
--
作者：
Chen, Lu;Lei, Fang;Ma, Teng
设计了一种新型的Eu 3+掺杂SiO2-B2 O3-Al 2 O3-CaO-Na 2 O硼硅酸盐玻璃，用于镶嵌YAG：Ce用于光纤陀螺。它具有强烈的Eu 3+红色发射，平均衰减时间为6.8 μ s，热导率约为0.9 W/（mK）（5倍的硅树脂）。Eu ~（3+）的掺杂量大于10mol%，没有浓度猝灭现象。PiG显示Ce 3+的可变衰减时间，这是由伪固溶度机制解释的可调界面缺陷引起的。WLED的颜色从冷白色（6004 K）改变为增加了更多黄色发射的暖白色（3799 K）。获得的最大发光效率和显色指数分别为68 lm/W和78。基于发光还原，PiGs的抗热猝灭能力是PiS的三倍。PiG系统可以潜在地用于无树脂的高功率WLED。
A novel Eu3+ doped SiO2-B2O3-Al2O3-CaO-Na2O based borosilicate glass was designed to embed YAG: Ce for PiGs. It exhibits intense Eu3+ red emission with the average decay times of 6.8 mu s and has the thermal conductivity of about 0.9 W/(mK) (five times that of silicone resin). The doped Eu3+ is over 10 mol% without any concentration quenching. The PiGs show variable decay time of Ce3+, which results from the tunable interface defects explained by the pseudo-solid solubility mechanism. The color of the WLEDs changes from cool white (6004 K) to warm white (3799 K) with more yellow emission added. The obtained maximal luminous efficiency and color rendering index are about 68 lm/W and 78, respectively. The anti-thermal quenching power of the PiGs is three times that of PiS based on the luminescent reduction. The PiG system can be used potentially for resin-free high power WLEDs.