Synthesis and Optical Properties of Core Shell NaYF4: Yb3+, Er3+ / SiO2 Particles
CHEN Shi, ZHOU Guo-Hong, ZHANG Hai-Long, YANG Yan, WANG Shi-Wei
Journal of Inorganic Materials . 2010, (11): 1128 -1132 .  DOI: 10.3724/SP.J.1077.2010.01128