Ba3CaSi1.7Al0.3O8: Eu, Mn white-emitting phosphor was prepared by solid reaction and X-ray powder diffraction (XRD)
analysis confirmed the formation of Ba3CaSi1.7Al0.3O8: 0.1Eu, 0.1Mn. It was found experimentally that, its three-color
emission peaks situated at 621, 491 and 435 nm respectively under excitation of 350-450nm irradiation. The 435nm and
491nm emission bands are attributed to 4f to 5d transition of Eu2+ ions. The emission band peaking at 621nm originates
from the 4T1-6A1 transition of Mn2+ ions after the energy transferring from Eu2+ to Mn2+ ions. When the concentrations of
the Al3+, Eu2+ and Mn2+ ions were 0.8 mol, 0.1mol and 0.1mol respectively, the sample presented intense white emitting.
The addition of Al ion to the host leads to a substantial change of intensity ratio between blue to green emission.
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