Abstract
A novel blue–green emitting phosphor Ba2ZnSi2O7: Eu2+ was prepared by a combustion synthesis (CS) method. An efficient green emission under conditions ranging from ultraviolet to visible light was observed. The emission spectrum shows a single intensive band centered at 503 nm, which corresponds to the 4f 65d 1→4f 7 transition of Eu2+. The excitation spectrum is a broad band extending from 260 to 465 nm, which matches the emission of ultraviolet light-emitting diodes (UV-LEDs). The critical quenching concentration of Eu2+ in Ba2ZnSi2O7:Eu2+ phosphor is about 0.05 mol. The corresponding concentration quenching mechanism is verified to be a dipole–dipole interaction. The value of the critical transfer distance is calculated as 19 Å, which is in good agreement with the value (20 Å) derived from the experimental data.
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Yao, S.S., Xue, L.H., Li, Y.Y. et al. Concentration quenching of Eu2+ in a novel blue–green emitting phosphor: Ba2ZnSi2O7:Eu2+ . Appl. Phys. B 96, 39–42 (2009). https://doi.org/10.1007/s00340-009-3450-y
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DOI: https://doi.org/10.1007/s00340-009-3450-y