Abstract
The BaAl2Si2O8:Eu2+ blue emitting phosphor was obtained through the one-step calcination process of precursors prepared by chemical co-precipitation method. The phase structure and luminescence propertied of the phosphor were investigated using X-ray diffraction (XRD) and a fluorescence spectrophotometer. The excitation spectrum exhibited a broad band between 230 nm and 400 nm and the emission peaking at about 470 nm was observed, which originated from the allowed f-d transition of Eu2+ ions at Ba2+ sites. Owing to the different optimal concentrations under different excitation wavelengths (254 nm and 365 nm), the energy-transfer mechanism in this phosphor has changed from the dipole-dipole interaction to the exchange interaction of Eu2+ ions.
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Ma, M., Zhu, D., Zhao, C. et al. Luminescence properties of Eu2+ doped BaAl2Si2O8 phosphor for white LEDs. Sci. China Phys. Mech. Astron. 54, 1783 (2011). https://doi.org/10.1007/s11433-011-4465-z
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DOI: https://doi.org/10.1007/s11433-011-4465-z