Alternating-current thin-film electroluminescent device modeling via SPICEFowler-Nordheim diode

A novel SPICE model is proposed for simulating the electrical characteristi cs of alternating-current thin-film electroluminescent (ACTFEL) devices. Th e model consists of two capacitors, representing the top and bottom insulat ors of the ACTFEL device, connected to a Fowler-Nordheim diode shunted by a resistor, which account for conduction and leakage, respectively, in the A CTFEL phosphor layer. A software interface is developed so that the user ma y conveniently input the two adjustable model parameters (trap barrier heig ht and phosphor shunt resistance) as well as five parameters corresponding to the physical structure of the ACTFEL device (electron effective mass, de vice area, insulator capacitance, phosphor thickness, and phosphor dielectr ic constant). Excellent agreement is obtained between measured and simulate d electrical characteristics for evaporated ZnS:Mn ACTFEL devices.