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Photoluminescence studies of NaYF 4 :Yb/Er (18/2 mol%) nanocrystals with varying dopant concentration of Gd 3+. F Wang et al. Nature 463 , 1061-1065 (2010) doi:10.1038/nature08777.
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Photoluminescence studies of NaYF4:Yb/Er (18/2 mol%) nanocrystals with varying dopant concentration of Gd3+. F Wang et al.Nature463, 1061-1065 (2010) doi:10.1038/nature08777