Abstract
The EL performance of high frequency driven oxide phosphor TFEL devices using a thick BaTiO_3 ceramic sheet insulator have been demonstrated. The EL characteristics such as luminance, threshold voltage and luminance increase in relation to applied voltage always improved as the sinusoidal wave voltage driving frequency was increased from 60Hz to 10kHz. Luminaces above 1000 cd/m^2 for green emission and 300 cd/m^2 for red emission were obtained in ZnGa_2O_4:Mn, Ga_2O_3:Mn and Ga_2O_3:Cr TFEL devices, respectively, driven with a voltage below 141V at 10kHz. The Ga_2O_3:Mn TFEL device driven at a frequency 10kHz exhibited a long term stable operation of more than 3000 hours.
