Chalcogen Impurities in Silicon
If an atom of the host lattice in silicon is replaced by an atom belonging to the fifth group in the periodic table, the potential binding the extra electron to the impurity atom can, in most cases, be approximated by a hydrogen-like potential. 1 This gives rise not only to an energy level in the band gap for the impurity ground state, but, in addition, also to a series of excited states. In silic