Complexes of Nitrogen and Point Defects in Silicon

Abstract
The effect of electron-irradiation is investigated on the optical absorption in nitrogen-doped Si. Two absorption peaks that have been ascribed to pairs of nitrogen atoms are found to split each into two peaks due to electron-irradiation. One of the two peaks after the splitting of each peak is attributed to the absorption due to vibration of an ordinary nitrogen atom-pair and the other to that of a complex consisting of a nitrogen atom-pair and a single vacancy.