Abstract
The electrical and optical properties of Mg-diffused Si, both as-diffused and post-diffuse heat treated, have been investigated through measurements of dark conductivity and Hall effect, optical absorption, and photoconductivity. Complicated properties are observed which can be described consistently by a five-level model, a major level at 0.107 eV associated with an interstitial neutral magnesium donor plus four shallower donor levels at 0.04, 0.055, 0.08, and 0.093 eV below the conduction band.