Combinatorial Optimization of (Lu1₋(x)Gd(x))3Al5O12:Ce3(y) yellow phosphors as precursors for ceramic scintillators.

ABSTRACT

A combinatorial chemistry method was employed to screen the yellow phosphors of (Lu1₋(x)Gd(x))3Al5O12Ce3(y) as luminescent materials. An array of 81 compositions was synthesized by inkjetting nitrate solutions into microreactor wells and sintering at high temperature. The candidate formulations were evaluated by luminescence pictures, and the optimal composition was determined to be Lu(2.7)Gd(0.3)Al(5)O(12)Ce(0.045) after scale-up and detailed characterization. Lu2.7Gd0.3Al5O12Ce0.045 was also found to have a short decay time (≤53.97 ns). These results demonstrate the great potential of the Lu2.7Gd0.3Al5O12Ce0.045 as a component of ceramic scintillators.