Wang Ziyao, Chen Jian, Liu Yangai, Luan Xuezhu, Ma Guofeng
Institute of Innovative Science and Technology, Shenyang University, Shenyang 110044, China.
Office of Scientific Research, Peking University, Beijing 100871, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2021 Sep 5;258:119829. doi: 10.1016/j.saa.2021.119829. Epub 2021 Apr 20.
In this work, we report a color-tunable green-orange-emitting phosphor by introducing Bi and Eu into BaLuO host lattice. The emission spectra of BaLuO:Bi,Eu cover the whole visible spectral region, and present both the typical emissions from P - S transitions of Bi and D - F transitions of Eu. The energy transfer behavior in the phosphor has been verified, based on which the emitting color of BaLuO:0.08Bi,4yEu (y = 0-0.08) can be tuned from yellowish green (0.3188, 0.4491) to orange (0.5304, 0.3871). The phosphor BaLuO:0.08Bi,0.32Eu shows 33.3% improvement in emission intensity of Eu compared with that of BaLuO:0.32Eu. Moreover, soft polydimethylsiloxane/phosphor composite films were prepared utilizing the BaLuO:Bi,Eu. Intense green-orange emissions suggest that the phosphors and corresponding s-PDMS-based films can be considered as promising candidates for near-UV pumped lighting and flexible devices.
在这项工作中，我们通过将铋（Bi）和铕（Eu）引入BaLuO基质晶格中，报道了一种颜色可调的发出绿橙色光的荧光粉。BaLuO:Bi,Eu的发射光谱覆盖了整个可见光谱区域，并呈现出Bi的P - S跃迁和Eu的D - F跃迁的典型发射。已验证了该荧光粉中的能量转移行为，基于此，BaLuO:0.08Bi,4yEu（y = 0 - 0.08）的发光颜色可从黄绿色（0.3188, 0.4491）调至橙色（0.5304, 0.3871）。与BaLuO:0.32Eu相比，荧光粉BaLuO:0.08Bi,0.32Eu的Eu发射强度提高了33.3%。此外，利用BaLuO:Bi,Eu制备了柔软的聚二甲基硅氧烷/荧光粉复合薄膜。强烈的绿橙色发射表明，这些荧光粉和相应的基于聚二甲基硅氧烷的薄膜有望成为近紫外泵浦照明和柔性器件的候选材料。
