Preparation and Luminescent Properties of Tb~(3+) Doped Bi_2WO_6 Phosphor

摘要

The Tb~(3+)doped Bi_2WO_6 luminescent materials are synthesized by a co-precipitation method. The structure and composition of the samples were characterized by DTA-TG and XRD. The results showed that the formula of the sample is Bi_2WO_6 at the temperature of 600°C～900°C, which belongs to the needed and stable orthorhombic crystal. The luminescence properties were characterized by UV-vis and fluorescence spectrophotometer. The results showed that, the phosphor can be effectively stimulated by blue light of 488nm, we can get the intense green-emission, which corresponds to the ~5D_4→~7F_5 transitions of Tb~(3+). It indicates that the samples match the light-emitting wavelength of the common blue-emitting InGaN chips and are expected to be applicable to a new type of green-emission light conversion materials which are applicable to the blue LED chips.