High visible yield nanophosphors under NIR excitation

L.A. Diaz-Torres, E. De la Rosa, P. Salas, T. López-Luke
centro de investigaciones en optica AC, MX

Keywords: visible upconversion, nanocrystals, zirconium, yttrium

Abstract:

A facile hydrotermal process for synthesis of various metal- oxide nanocrystals in the range between 10 and 100nm is presented. These nanocrystals present a high upconversion yield under NIR excitation. The oxide nanophosohors also are suitable for white ligth generation under both excitations: UV-Blue and NIR. The photoluminescent properties and morphology are controled by surfactant concentration.