Yan Xue-Wen, Wang Zhao-Jin, Wang Bo-Yang, Sun Ze-Yu, Zhang Chen-Xue, Han Qing-Yan, Qi Jian-Xia, Dong Jun, Gao Wei. Enhanced red upconversion fluorescence emission of Ho3+ ions in NaLuF4 nanocrystals through building core-shell structureJ. Acta Physica Sinica, 2019, 68(17): 174204. DOI: 10.7498/aps.68.20190441