Liu Wen-Quan, Wu Dan, Chang Hugejile, Duan Ru-Xia, Wu Wen-Jie, Amu Guleng, Chao Ke-Fu, Bao Fu-Quan, Tegus Ojiyed
Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, College of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot 010022, China.
School of Physical Science and Technology, & Inner Mongolia Key Lab of Nanoscience and Nanotechnology, Inner Mongolia University, Hohhot 010021, China.
Nanomaterials (Basel). 2018 Jan 25;8(2):66. doi: 10.3390/nano8020066.
Synthesizing phosphors with high performance is still a necessary work for phosphor-converted white light-emitting diodes (W-LEDs). In this paper, three series of CaAlSiN₃:Eu (denoted as CASN:Eu) phosphors using Eu₂O₃, EuN and EuB₆ as raw materials respectively are fabricated by under the alloy precursor normal pressure nitridation synthesis condition. We demonstrate that CASN:Eu using nano-EuB₆ as raw material shows higher emission intensity than others, which is ascribed to the increment of Eu ionic content entering into the crystal lattice. An improved thermal stability can also be obtained by using nano-EuB₆ due to the structurally stable status, which is assigned to the partial substitution of Eu-O (Eu-N) bonds by more covalent Eu-B ones that leads to a higher structural rigidity. In addition, the W-LEDs lamp was fabricated to explore its possible application in W-LEDs based on blue LEDs. Our results indicate that using EuB₆ as raw materials can provide an effective way of enhancing the red emission and improving the thermal stability of the CASN:Eu red phosphor.
合成高性能荧光粉对于磷光转换白光发光二极管（W-LED）来说仍然是一项必要的工作。本文在合金前驱体常压氮化合成条件下，分别以Eu₂O₃、EuN和EuB₆为原料制备了三个系列的CaAlSiN₃:Eu（简称CASN:Eu）荧光粉。我们证明，以纳米EuB₆为原料的CASN:Eu表现出比其他荧光粉更高的发射强度，这归因于进入晶格的Eu离子含量的增加。由于结构稳定，使用纳米EuB₆还可以获得更高的热稳定性，这归因于Eu-B共价键部分取代了Eu-O（Eu-N）键，从而导致更高的结构刚性。此外，制备了W-LED灯以探索其在基于蓝光LED的W-LED中的可能应用。我们的结果表明，使用EuB₆作为原料可以提供一种增强红色发射和提高CASN:Eu红色荧光粉热稳定性的有效方法。
