Improving the thermal stability of phosphor in a white light-emitting diode (LED) by glass-ceramics: Effect of Al 2 O 3 dopant
Improving the thermal stability of phosphor in a white light-emitting diode (LED) by glass-ceramics: Effect of Al 2 O 3 dopant
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DOI：
10.1016/j.jeurceramsoc.2017.10.037
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发表时间：
2017-11
影响因子：
5.7
通讯作者：
H. Su;Yu Nie;Hsi-Wen Yang;D. Tang;Kongfa Chen;Teng Zhang
中科院分区：
文献类型：
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作者：
H. Su;Yu Nie;Hsi-Wen Yang;D. Tang;Kongfa Chen;Teng Zhang
采用垂直沉积法，采用P2 O 5-ZnO-Na 2 O-Al 2 O3微晶玻璃系统成功封装了一种用于白色发光二极管（LED）的荧光粉：掺铈钇铝石榴石（YAG：Ce 3+）。在这里，我们发现可以通过将封装的磷光体与蓝色芯片（例如InGaN）组合来实现白色光。掺杂4mol%Al2O3的样品显示出125.8 lm W−1的发光效率（LE）、5769 K的相关色温（CCT）和68的显色指数（CRI）。此外，掺杂4mol%Al2O3的试样在150 °C热处理1200 h后，LE损失仅为3.6%，明显低于传统树脂的19.3%。此外，提出了一种可能的机制，降低LE损失使用玻璃陶瓷。
In this work, a phosphor for white light-emitting diode (LED) application, Ce3+-doped yttrium aluminum garnet (YAG:Ce3+), was successfully packaged using a P2O5-ZnO-Na2O-Al2O3glass-ceramic system, through a vertical deposition method. Here, we found that white light can be achieved by combining the packaged phosphor with a blue chip (e.g. InGaN). The specimen doped with 4 mol% Al2O3showed a luminous efficacy (LE) of 125.8 lm W−1, at a correlated color temperature (CCT) of 5769 K, with a color rendering index (CRI) of 68. In addition, the LE loss of the specimen doped with 4 mol% Al2O3was only 3.6% after heat treatment at 150 °C for 1200 h, which is significantly lower than that of traditional resin (19.3%). Moreover, a possible mechanism for reducing the LE loss using glass-ceramics was proposed.