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

A combinatorial chemistry method was employed to screen the yellow phosphors of (Lu₁₋(x)Gd(x))₃Al₅O₁₂:Ce₃(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. Lu₂.₇Gd₀.₃Al₅O₁₂:Ce₀.₀₄₅ was also found to have a short decay time (≤53.97 ns). These results demonstrate the great potential of the Lu₂.₇Gd₀.₃Al₅O₁₂:Ce₀.₀₄₅ as a component of ceramic scintillators.