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MacDougall, Sean K. W.; Aruna, Ivaturi; Marques-Hueso, Jose; Krämer, Karl W.; Richards, Bryce S. (2012). Ultra-high photoluminescent quantum yield of beta-NaYF4: 10% Er3+ via broadband excitation of upconversion for photovoltaic devices. Optics express, 51(15), pp. 8385-8393. Washington, D.C.: Optical Society of America
