Preparation and Modified Upconversion Luminescence In NaGd(WO4)2:Yb3+/Tm3+ Inverse Opal Photonic Crystals
WANG Yun-Feng, SONG Jin-Fan, TANG Xiao-Yan, HU Dong-Mei
Journal of Inorganic Materials . 2016, (10): 1058 -1062 .  DOI: 10.15541/jim20160104