Fabrication of Transparent Green-Emitting Plastic Scintillators by the Modified Polymerization Method

The green-emitting plastic scintillators with high transparence, short decay time and high quantum yield were fabricated by the modified thermal polymerization procedure. The effects of different concentrations of primary and secondary fluorescent dopants on photoluminescence performance, such as fluorescence intensity, decay time and absolute quantum yield, were investigated through orthogonal experiments. The optimal formula ratio for the plastic scintillator was that the primary dopant concentration was 0.25 wt.% and the secondary dopant concentration was 0.03 wt.%. The photoluminescence decay time of the optimal sample was 3.37 ns, which was faster than that of EJ-260 (6.57 ns) and its corresponding quantum yield was 91.57%, compared to that of EJ-260 (98.59%).