Low voltage cathodoluminescent characteristics of spherical zinc aluminogallate phosphors

In this work, we prepared spherical gallate-based phosphors using an aeroso l pyrolysis method. The synthetic parameters such as post heat-treatment te mperature, activator concentration, and degree of reductions were optimized for the maximum cathodoluminescent (CL) intensity. For enhancing the CL lu minous efficiency of phosphors, adjustment of lattice structure were also c onsidered. It was found that the CL intensity was sensitive to the crystal structure in host lattice, which would be engineered by Al concentration in ZnGa-Al-O system. The most prominent result on the zinc aluminogallates wh ich are of spherical shape was the brightness of 550 cd/m(2) at 400 V excit ation with color coordinate of x = 0.1665 and y = 0.6655. (C) 2001 The Elec trochemical Society.