The energy transfer mechanisms between Ce 3þ and Tb 3þ in LaPO 4 :Ce,Tb nanocrystals have been studied by means of timeresolved luminescence spectroscopy in a wide temperature range (10-300 K). Special attention was paid to detailed comparative analysis of both rise and decay emission components of both

LaPO 4 :Ce,Tb as a nanoscale phosphor is prepared via a microwave-accelerated synthesis in ionic liquids. The underlying approach results in non-agglomerated nanocrystals, 9-12 nm in size, and exhibiting quantum yields of 70 % (Tbrelated emission) and 90 % (Ce/Tb-related emission). Based on the underlying concept of synthesis, application-oriented aspects are focused. Driven by the addition of oleylamine, first, phase transfer from the polar phase of synthesis to non-

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