Fig. 5From: Eu2+-Activated Green-Emitting Phosphor Obtained from Eu3+ Ions doping Zeolite-3A in Air Surroundings and Its Efficient Green Light-Emitting Diodesa PL emission spectra and b the relative PL intensity vary with the concentration of Eu element for zeolite-3A: 1.3 wt% Eu phosphors (x = 0.9~1.9) sintered at 1400 °C for 3 hBack to article page