Effect of the binder on the brightness of the electroluminescence emission of ZnS powder phosphors

The electroluminescence of a ZnS phosphor based on several binders was examined. It was shown that electroluminescent layers based on several binders have an additional (super) brightness relative to the brightness corresponding to a field strength computed with the theory of heterogeneous systems. The hypothesis is outlined that the super-brightness results from a charge accumulation on the surface of the crystal phosphor during the excitation of the same.