中国物理B ›› 2022, Vol. 31 ›› Issue (12): 127802-127802.doi: 10.1088/1674-1056/ac6160
Lizhi Fang(方立志)1, Xiong Zhou(周雄)1, Zhiwei Zhao(赵志伟)2, Biao Zheng(郑标)3, Haiping Xia(夏海平)1,†, Jun Wang(王军)3,‡, Hongwei Song(宋宏伟)4, and Baojiu Chen(陈宝玖)5
Lizhi Fang(方立志)1, Xiong Zhou(周雄)1, Zhiwei Zhao(赵志伟)2, Biao Zheng(郑标)3, Haiping Xia(夏海平)1,†, Jun Wang(王军)3,‡, Hongwei Song(宋宏伟)4, and Baojiu Chen(陈宝玖)5
摘要: By using an improved Bridgman method, 0.3 mol% Tm$^{3+}/0.6$ mol% Tb$^{3+}/y$ mol% Eu$^{3+}$ ($y = 0$, 0.4, 0.6, 0.8) doped Na$_{5}$Y$_{9}$F$_{32}$ single crystals were prepared. The x-ray diffraction, excitation spectra, emission spectra and fluorescence decay curves were used to explore the crystal structure and optical performance of the obtained samples. When excited by 362 nm light, the cool white emission was realized by Na$_{5}$Y$_{9}$F$_{32}$ single crystal triply-doped with 0.3 mol% Tm$^{3+}/0.6$ mol% Tb$^{3+}/0.8$ mol% Eu$^{3+}$, in which the Commission Internationale de l'Eclairage (CIE) chromaticity coordinate was (0.2995, 0.3298) and the correlated color temperature (CCT) was 6586 K. The integrated normalized emission intensity of the tri-doped single crystal at 448 K could keep 62% of that at 298 K. The internal quantum yield (QY) was calculated to be $\sim 15.16$% by integrating spheres. These results suggested that the single crystals tri-doped with Tm$^{3+}$, Tb$^{3+}$ and Eu$^{3+}$ ions have a promising potential application for white light-emitting diodes (w-LEDs).
中图分类号: (Optically stimulated luminescence)