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

The behavior of hot-electrons is very important for thin film electrolumine scence (TFEL) devices. In SrS:Ce TFEL, the electrons in excited states of C e3+ ions are easily to be ionized into conduction band under a high electri c 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 determin ed. The energy transfer process is discussed. (C) 1998 Elsevier Science Lim ited. All rights reserved.