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Fischer, Stefan; Martín-Rodríguez, Rosa; Fröhlich, Benjamin; Krämer, Karl; Meijerink, Andries; Goldschmidt, Jan Christoph (2014). Upconversion quantum yield of Er3+-doped β-NaYF4 and Gd2O2S: The effects of host lattice, Er3+ doping, and excitation spectrum bandwidth. Journal of luminescence, 153, pp. 281-287. North-Holland 10.1016/j.jlumin.2014.03.047
Fischer, Stefan; Fröhlich, Benjamin; Krämer, Karl; Goldschmidt, Jan Christoph (2014). Relation between Excitation Power Density and Er3+ Doping Yielding the Highest Absolute Upconversion Quantum Yield. Journal of physical chemistry. C, 118(51), pp. 30106-30114. American Chemical Society 10.1021/jp510209x
