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Manganese materials with attractive optical properties have been proposed for applications in such areas as photonics, light-emitting diodes, and bioimaging. In this paper, we have demonstrated multicolor Mn 2+  luminescence in the visible region by controlling Ce 3+ -Mn 2+  energy transfer in rare earth nanocrystals [NCs]. CeF 3  and CePO 4  NCs doped with Mn 2+  have been prepared and can be well dispersed in aqueous solutions. Under ultraviolet light excitation, both the CeF 3 :Mn and CePO 4 :Mn NCs exhibit Mn 2+  luminescence, yet their output colors are green and orange, respectively. By optimizing Mn 2+  doping concentrations, Mn 2+  luminescence quantum efficiency and Ce 3+ -Mn 2+  energy transfer efficiency can respectively reach 14% and 60% in the CeF 3 :Mn NCs.

Efficient manganese luminescence induced by Ce3+-Mn2+ energy transfer in rare earth fluoride and phosphate nanocrystals