LIANG Li-fang, ZHUANG Jian-le, WU Hao, WANG Jing, WU Ming-mei, SU Qiang. White Up-conversion Emission of Hydrothermally Synthesized Hexagonal NaYbF<sub>4</sub>:Er<sup>3+</sup>/Tm<sup>3+</sup>[J]. Chinese Journal of Luminescence, 2008,29(6): 996-1002
LIANG Li-fang, ZHUANG Jian-le, WU Hao, WANG Jing, WU Ming-mei, SU Qiang. White Up-conversion Emission of Hydrothermally Synthesized Hexagonal NaYbF<sub>4</sub>:Er<sup>3+</sup>/Tm<sup>3+</sup>[J]. Chinese Journal of Luminescence, 2008,29(6): 996-1002DOI: