Enhancement of green emission from Tb3+:GdOBr phosphors with Ce3+ ion co-doping
作者： S.D Cheng , C.H Kam , S Buddhudu
DOI: 10.1016/S0025-5408(01)00587-6
关键词: Energy level 、 Phosphor 、 Doping 、 Green emission 、 Energy transfer 、 Chemistry 、 Excitation 、 Luminescence 、 Inorganic chemistry 、 Ion
摘要: Abstract A strong green emission (5D4→7F5) has been observed from Tb3+ (1.0 mol%) doped into GdOBr powder phosphors upon excitation with an UV-wavelength (226 nm). To this phosphor, different amounts of Ce3+ (from 0.1 to 1.5 have added further improve the efficiency Tb3+-doped GdOBr. It found that optimum concentration, 0.2 mol% Ce3+, results in a twofold enhancement intensity. The could not be increased at higher concentrations due Ce3+-Ce3+ ion interactions, i.e., concentration quenching effect. mechanism involved energy transfer between and explained level diagram.
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