Research Article
Facile Synthesis of Yb3+- and Er3+-Codoped LiGdF4 Colloidal Nanocrystals with High-Quality Upconversion Luminescence
Figure 7
Energy level diagrams of upconversion emissions from Yb3+ to Er3+ in LiGdF4:Yb3+/Er3+ nanocrystals under 980 nm pump power excitation.