The photoluminescence properties of BiTaO 4∶Pr 3+ and BiTaO 4 at room temperature were studied, and the infrared transmission and diffusion reflection spectra of BiTaO 4 were measured. The photoluminescence s...The photoluminescence properties of BiTaO 4∶Pr 3+ and BiTaO 4 at room temperature were studied, and the infrared transmission and diffusion reflection spectra of BiTaO 4 were measured. The photoluminescence spectrum of BiTaO 4 peaks at about 420, 440 and 465 nm. There has an obvious excitation band from 330 to 370 nm. The photoluminescence spectrum of BiTaO 4∶Pr 3+ consists of the characteristic emission of Pr 3+ , and its main peak is at 606 nm from 3P 0→ 3H 6 transition of Pr 3+ . Its excitation spectrum consists of the wide band with maximum at 325 nm, the wide band in the range of 375～430 nm, and the characteristic excitation of Pr 3+ . The bands at 325 nm and 375～430 nm may be from the absorption of the charge transfer transition of the tantalate group and defect energy levels in its forbidden band, respectively. There is energy transfer from host to Pr 3+ . Because both the host density and photoluminescence peak intensity of BiTaO 4∶Pr 3+ are superior to PbWO 4, BiTaO 4∶Pr 3+ may be a potential heavy scintillator.展开更多
文摘The photoluminescence properties of BiTaO 4∶Pr 3+ and BiTaO 4 at room temperature were studied, and the infrared transmission and diffusion reflection spectra of BiTaO 4 were measured. The photoluminescence spectrum of BiTaO 4 peaks at about 420, 440 and 465 nm. There has an obvious excitation band from 330 to 370 nm. The photoluminescence spectrum of BiTaO 4∶Pr 3+ consists of the characteristic emission of Pr 3+ , and its main peak is at 606 nm from 3P 0→ 3H 6 transition of Pr 3+ . Its excitation spectrum consists of the wide band with maximum at 325 nm, the wide band in the range of 375～430 nm, and the characteristic excitation of Pr 3+ . The bands at 325 nm and 375～430 nm may be from the absorption of the charge transfer transition of the tantalate group and defect energy levels in its forbidden band, respectively. There is energy transfer from host to Pr 3+ . Because both the host density and photoluminescence peak intensity of BiTaO 4∶Pr 3+ are superior to PbWO 4, BiTaO 4∶Pr 3+ may be a potential heavy scintillator.
