Chinese Optics Letters, 2015, 13 (7): 071601, Published Online: Sep. 14, 2018
Luminescence of Tb3+/Eu3+ codoped LiYF4 single crystals under UV excitation for white-light LEDs
Abstract
The absorption spectra, excitation spectra, and emission spectra of Tb 3 + / Eu 3 + ions in LiYF 4 single crystals synthesized by an improved Bridgman method are measured. The emission spectra of several bands, mainly located at blue ~ 487 nm (Tb : D 4 5 → F 7 6 ), yellowish green ~ 542 nm (Tb : D 4 5 → F 7 5 ), and red ~ 611 nm (Eu : D 0 5 → F 7 2 ) wavelengths, are observed under excitation by UV light. An ideal white light emission as a result of simultaneous combination of these emissions can be obtained from 1.11 mol%
Yongzhang Jiang, Haiping Xia, Shuo Yang, Jiazhong Zhang, Dongsheng Jiang, Cheng Wang, Zhigang Feng, Jian Zhang, Xuemei Gu, Jianli Zhang, Haochuan Jiang, Baojiu Chen. Luminescence of Tb3+/Eu3+ codoped LiYF4 single crystals under UV excitation for white-light LEDs[J]. Chinese Optics Letters, 2015, 13(7): 071601.