Abstract
The effect of laser radiation on the current-voltage characteristics and intrinsic quantum yield of electroluminescence after irradiation is investigated. As a result of irradiation at supercritical radiant power flux levels (greater than 107 W/cm2) an abrupt drop in the luminescence quantum yield and a steep growth of the leakage currents are observed in the current-voltage characteristics. It is assumed that by exciting the electronic subsystem of the impurity atoms the powerful optical radiation facilitates the occurrence of quasichemical reactions.
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