Near-infrared(NIR)-Ⅱ luminescence properties of CaF2:20Yb2Er/Na@CaF2:Ce nanomaterial
LU Zhao, WEI Huixin, ZHAI Chunpeng
Jorunal of Functional Materials . 2023, (4): 4008 -4013 .  DOI: 10.3969/j.issn.1001-9731.2023.04.002