Li+ ions doping core–shell nanostructures: An approach to significantly enhance upconversion luminescence of lanthanide-doped nanocrystals
JOURNAL OF ALLOYS AND COMPOUNDS [2015]
Mingye Ding, Yaru Ni, Yan Song, Xiaoxia Liu, Tengli Cui, Daqin Chen, Zhenguo Ji, Feng Xu, Chunhua Lu, Zhongzi Xu