| 초록 |
To develop efficient green-emitting PL phosphors for applications in PDP and Lamp, a borate compound was adopted as new host material for Tb3+ activator. The Y5Si2BO13:Tb3+ phosphor powders were synthesized from Y2O3, SiO2, H3BO3 and Tb4O7 by conventional solid-state reaction. The crystalline phases for the powders obtained on various firing conditions were analyzed by an X-ray diffraction pattern. Upon analysis of the PL spectroscopic investigations on the resulting green phosphors, the phosphor composition and processing parameters were optimized. In the PLE spectra, it was observed that the Y5Si2BO13:Tb3+ phosphor exhibits significant absorption intensity in the UV and VUV regions. As the result, the Y5Si2BO13:Tb3+ phosphors under UV or VUV excitation emit the green light centered at the wavelength of 547 nm. On the other hand, the PL emission intensity of the phosphors was found to be enhanced up to the 30% of Tb3+ content. In addition, the VUV PL intensity and the chromaticity coordinates of the optimized phosphor composition were compared to those of Zn2SiO4:Mn as a reference. |
