Optical Transition of Eu3+ Ions in YMg2Al3B6O17

概要

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To characterize the optical transition of Eu3+ ions in YMg2Al3B6O17, solid-state reactions were carried out. Optical properties were investigated under excitation at 254 nm. A broad absorption band was exhibited at 200–320 nm in the obtained excitation spectra, which might favor application of this material in lamps. This might be attributable to charge transfer between Eu3+ ions and neighboring oxygen anions. Under 254 nm excitation, deep red emission due to the $\text{$^{5}$D$_{0}$} \rightarrow \text{$^{7}$F$_{2}$}$ transition at 616 nm was observed. The doping concentration of Eu3+ in the YMg2Al3B6O17 host was quenched close to 28 mol %. The Commission Internationale de l’Eclairage (CIE) chromaticity coordinates of YMg2Al3B6O17:Eu3+ were $(0.6704, 0.3294)$ in which correspond to deep red. However, the photoluminescence (PL) was inferior to that of Y2O3:Eu3+ by 30% in our experimental regime. The phosphor particles had good morphology with a diameter of ${\sim}2$ μm.
2009-08-25