Abstract
The ceramics of thick-dielectric films were made with using barium titanate (BaTiO3) has high permittivity material. Powder inorganic EL devices in which ZnS:Cu,Cl and thick-dielectric films were used as a emission layer and insulating layer was also fabricated. EL devices were evaluated with the properties of thick-dielectric films. As a result of the evaluation, the relative permittivity of the thick-dielectric films were 6500. The optical properties and the luminous efficacy of the EL device driven at 200 V sinusoidal voltage of 1 kHz improved by 204 % and 120 %, respectively compared with conventional powder EL device.
