Effect of solution combusted TiO2 nanoparticles added to the dielectric layers for low power consumption AC powder...

A unique synthesis method was developed, which is called solution combustion method (SCM). TiO2 nanoparticles were synthesized by this method. These SCM TiO2 nanoparticles (~35 nm) were added to the dielectric layers of AC powder electroluminescence (EL) devices. The dielectric layers were made of commercial BaTiO3 particles (~1.2 μm) and binding polymer. 0, 5, 10 and 15 wt% of SCM TiO2 nanoparticles were added to the dielectric layers during fabrication of AC powder EL devices respectively. Dielectric constants of these four kinds of dielectric layers were measured. The brightnesses and current densities of AC powder EL devices were also measured. When 10 wt% of SCM TiO2 nanoparticles was added, dielectric constant and brightness were increased by 30% and 60% respectively. Furthermore, the current density was decreased by 60%. This means that the addition of SCM TiO2 nanoparticles resulted in four fold higher luminous efficiency.