The mixing interaction and energy transfer between the conduction band of SrS and the levels of Ce3+∗

Abstract

The behavior of hot-electrons is very important for thin film electroluminescence (TFEL) devices. In SrS:Ce TFEL, the electrons in excited states of Ce³⁺ ions are easily to be ionized into conduction band under a high electric field, and are easily trapped by the ionized luminescent centers under a low electric field. In this paper, the dependence of ionization possibility on the field strength is studied and the emission wave forms were determined. The energy transfer process is discussed.