Transient acceleration process of electrons in ZnS-type thin film electroluminescence devices

The transient acceleration process of electrons in ZnS-type thin film elect roluminescent devices is studied in detail for the first time through the M onte Carlo method. The transient time and drift length before the balance o f acceleration and scattering are of the order of 200 fs and 30 nm respecti vely. The steady average kinetic energy of electrons increases with electri c field. Field emission processes of electrons trapped at interface states only affect me transient process of electron transport and have no influenc e on the steady state. New explanations of the 'dead layer' phenomenon and the overshoot in the average drift velocity are proposed based on our calcu lation results.