The electronic structure and optical properties of intrinsic and doped Ca _2 Ge have been calculated by using the first-principles calculation method based on density functional theory. The doping content of As were 2. 08% and 1. https://clgrsuj3yfh3j.bloginwi.com/68599010/mouth-voix-et-lieux-du-pouvoir-dans-norma-rae-de-martin-ritt-1979