Fabrication and Cathode Luminescence of Partially MgO-Substituted ZnO Powders

Abstract

Recently, the development of new nonsulfide phosphors with high efficiency is urgently needed for VFDs and FEDs. The fabrication for hexagonal Zn 1ࢬx Mg x O 0.0ļxļ0.15 solid solution and the effect of partially substituted MgO on the cathode luminescence CL were investigated in this research. A limited range of Zn 1ࢬx Mg x O solid solution was prepared using the thermal decomposition of complex Zn-Mg oxalate. The solubility of Mg in ZnO was estimated to be ca. 15ಚ. In the samples annealed at 1373 K for 2 h in a reduced atmosphere, green to blue cathode luminescence was observed. It is evident that the partial substitution of MgO results in the shift of green emission band at low wavelength side. The CL material is expected as a low-cost and blue lightemitting phosphor for lowvoltage luminescence in flat panel displays.

Highly enhanced luminescence of ZnO green phosphors by calcining ZnS with NH4Br as additive

“…In order to improve the conversion efficiency of UV to green light of ZnO, it is critical to eliminate ZnO's UV emission at around 370-390 nm and to enhance green emission. One of the common methods is to introduce a certain dopant into ZnO [12][13][14][15].…”