Fig. 4From: Eu2+-Activated Green-Emitting Phosphor Obtained from Eu3+ Ions doping Zeolite-3A in Air Surroundings and Its Efficient Green Light-Emitting DiodesXPS spectrum for Eu element of the zeolite-3A: 1.3 wt% Eu phosphors sintered at 1400 °C for 3 hBack to article page