Gao Wei, Sun Ze-Yu, Guo Li-Chun, Han Shan-Shan, Chen Bin-Hui, Han Qing-Yan, Yan Xue-Wen, Wang Yong-Kai, Liu Ji-Hong, Dong Jun. Upconversion luminescence characteristics of Ho3+ ion doped single-particle fluoride micron core-chell structureJ. Acta Physica Sinica, 2022, 71(3): 034207. DOI: 10.7498/aps.71.20211719