Research Article
Enhancement of Visible Upconversion Emission in Y2O3:Er3+-Yb3+ by Addition of Thiourea and LiOH in the Phosphor Synthesis
Figure 9
(a) Upconversion emission intensity versus excitation pump power at 980 nm, (b) dependence of the green and red upconversion emission for the Thiourea-LiOH sample.
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(b) |