Abstract
Light emitted from energetic electrons and holes near the drain region of Si field-effect transistor devices is measured spectrally resolved in the important energy range about the band gap. Using a sensitive Ge detector we examine the spectral range from 0.75 to 1.55 eV in order to identify and study the recombination of impact ionization generated electron-hole pairs. Two distinct recombination lines are observed superposed on a continuum background.