20.2 / Keir 20.2: SPICE Modeling of Dynamic Space Charge in ACTFEL Devices

Simulation of dynamic phosphor space charge in alternating-current thin-film electroluminescent (ACTFEL) devices is performed using SPICE equivalent circuit models. Two SPICE equivalent circuits are developed; one for the case of space charge creation via impact ionization and another for field emission. Both SPICE equivalent circuits are based on modeling the space charge distribution as a single sheet of charge. Simulation results show that both SPICE equivalent circuits are capable of generating electrical characteristics exhibiting capacitance overshoot.