New red phosphors BaZr(BO3)(2) and SrAl2B2O7 doped with Eu3+ for PDP applications

Abstract

Vacuum ultraviolet (VUV) excitation and photoluminescence (PL) characteristics of Eu3+ ion doped borate phosphors; BaZr(BO3)(2):Eu3+ and SrAl2B2O7:Eu3+ are studied. The excitation spectra show strong absorption in the VUV region with the absorption band edge at ca. 200 nm for BaZr(BO3)(2:)Eu and 183 nm for SrAl2B2O7:Eu, respectively, which ensures the efficient absorption of the Xe plasma emission lines. In BaZr(BO3)(2):Eu3+, the charge transfer band of EU3+ does not appear strongly in the excitation spectrum, which can be enhanced by co-cloping Al3+ ion into the BaZr(BO3)(2) lattices. The luminescence intensity of BaZr(BO3)(2):Eu3+ is also increased by Al3+ incorporation into the lattices. The PL spectra show the strongest emission at 615 nm corresponding to the electric dipole D-5(0) --> F-7(2) transition of E in both BaZr(BO3)(2) and SrAl2B2O7, similar to that in YAl3(BO3)(4), which results in a good color purity for display applications. (C) 2003 Elsevier Ltd. All rights reserved.