A first time prove of hot electron acceleration in ZnS:Mn electroluminescent layers is performed by vacuum emission and energy analysis in a spherical grid analyzer. The energy distributions show a strong peaking in the low energy region around 3 eV due to impact multiplication effects in ZnS as well as a high energy tail exceeding 20 eV and more. The Monte-Carlo simulation of hot and ballistic electron transport in high fields and with LO-phonon interaction is extended to impact valence band excitation and electron multiplication in ZnS. This ansatz gives a first explanation of the energy distribution measured in the present work.
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Fitting et al. (1990) studied this question.
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