Synthesis and Characterization of Red Emitting Eu3+-Doped YBO3 Phosphor

Red emitting new phosphor, YBO3 doped with Eu3+ ions, has been prepared by solid state reaction method. The excitation spectra were recorded by monitoring a red emission at 610 nm and observed very intense band in the lower wavelength region, 230 ~ 280 nm, which could be attributed due to the Eu3+-O2- charge transfer band (CTB) lying in the band gap region of the host matrix. In addition to the CTB, strong absorption lines in the excitation spectrum is located at 395 nm and 465 nm which corresponds to the 7F0 → 5L6 and 7F0 → 5D2 transitions of Eu3+ ions, respectively. The decay curves are found to be single exponential at lower concentrations and tends to be non-exponential at higher concentrations with shortening of lifetime (2.74 ms to 0.86 ms). The systematic investigation indicates that this Eu3+-doped YBO3 phosphor is an ideal candidate for solid state lighting applications.