Synthesis and VUV Photoluminescence Characterization of (Y,Gd)(V,P)O_4:Eu~(3+) as a Potential Red-emitting PDP Phosphor

摘要

YVO_4:Eu~(3+)-basedphosphors in three series with compositions (Y_(1-x)Eu_x)(V_(1-z)P_z)O_4,(Y_(0.95-y)Gd_yEu_(0.05))(V_(0.4)P_(0.6))O_4 and (Y_(0.95-y)Eu_(0.05)Gd_y)(V_(1-z)P_z)O_4 were synthesized and investigated as potential red-emitting phosphors for a plasma display panel (PDP). The optimal substitution proportions of P for V and Gd for Y were determined to be 60 and 20 mol %, respectively, for (Y_(0.95-y)Gd_y)(V_(1-z)P_z)O_4 doped with 5 mol % Eu~(3+). The vacuum ultraviolet PL and PLE spectra and chromaticity characteristics for the synthesized phosphors were measured and compared against those of a commercial red-emitting phosphor. Pumping the (Y,Gd)(P,V)O_4:Eu~(3+) phosphors at a wavelength of 172 nm is more efficient than that at 147 nm. For VUV excitation at 147 nm, the CIE chromaticity coordinates for our red-emitting (Y_(1-y)Gd_y)(V_(0.4)P_(0.6))O_4:Eu~(3+) are (0.6614,0.3286), as compared to (0.6443, 0.3613) for (Y,Gd)BO_3:Eu~(3+) from Kasei Optonix Ltd. We suggest that the composition-optimized (Y_(0.75)Gd_(0.20)Eu_(0.05))(V_(0.4)P_(0.6))O_4 can serve as an alternative phosphor to replace a widely used red-emitting commercial phosphor such as (Y,Gd)BO_3: Eu~(3+) or Y_2O_3: Eu~(3+).