Optical Excitation and Emission Spectra of YNbO4:Eu3+
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Abstract : In the excitation spectra of YNbO4 : Eu3+, the charge transfer (CT) band around 270 nm due to [NbO4]3−-Eu3+ interaction and sharp excitation peaks by f-f transition of Eu3+ strongly appeared simultaneously. CT band depended on the structural properties of powders, showing the red-shift with increasing the crystallinity, while the f-f transition peaks were independent of the crystallinity. For YNb1−xTaxO4 : Eu3+ (x = 0.05−0.2), [TaO4]3− configuration was locally constructed, leading to the blue-shift in CT band and the decrease in the red emission intensity with increasing the Ta content.
Abstract
Abstract : In the excitation spectra of YNbO4 : Eu3+, the charge transfer (CT) band around 270 nm due to [NbO4]3−-Eu3+ interaction and sharp excitation peaks by f-f transition of Eu3+ strongly appeared simultaneously. CT band depended on the structural properties of powders, showing the red-shift with increasing the crystallinity, while the f-f transition peaks were independent of the crystallinity. For YNb1−xTaxO4 : Eu3+ (x = 0.05−0.2), [TaO4]3− configuration was locally constructed, leading to the blue-shift in CT band and the decrease in the red emission intensity with increasing the Ta content.
참고문헌 (20)
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