Abstract
AbstractImpact excitation processes due to free exciton collisions with bound exciton complexes D°X are studied in CdS. It is found that the excitation power increasing from 103 to 104 W/cm2 leads to a considerable decrease of the I2 line intensity followed by the disappearence of the I2 line at the upper limit, whereas the I1 line can be distinctly seen in the luminescence spectra in the whole range of the excitation power. A model explaining the quenching of the I2 emission line by the Auger‐decay of an excited state of the D°X complex at high concentrations of free excitons is proposed. Experimental data are in good agreement with predicted dependences.
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