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Renero-Lecuna, C.; Martin-Rodriguez, R.; Valiente, R.; Gonzalez, J.; Rodriguez, F.; Krämer, K.W.; Güdel, H.U. (2011). Origin of the high upconversion green luminescence efficiency in -NaYF4:2% Er3+,20% Yb3+. Chemistry of materials, 23(15), pp. 3442-3448. Washington, D.C.: American Chemical Society 10.1021/cm2004227
