Electroluminescence in an Epoxy Resin

Electroluminescence—which can be used as a probe for studying breakdown mechanisms—is studied in one type of epoxy resin at room temperature. The electroluminescence spectrum is compared with x‐ray and ultraviolet radiation stimulated emissions. The behavior of luminescence bands with increasing applied voltage suggests that charge injection takes place and that the electroluminescence mechanism is that of impact ionization.