Acceptor compensation in nitrogen doped zinc selenide

The compensating centers associated with nitrogen in N-doped ZnSe are investigated. A nitrogen local vibration mode is observed in N doped ZnSe grown by MBE using FTIR. This nitrogen absorption band indicates that most of doped N atoms substitute Se sites and forms Zn-N bond having a tetrahedral symmetry. Ion beam analysis is performed on N-ion implanted and N-2-ion implanted ZnSe to get insight into the lattice location of N-2 in the ZnSe lattice. It is found that N atoms are located at substitutional sites in ZnSe, while N-2 in N-2-ion implanted ZnSe are located at random sites. It is suggested that there is no evidence for existence of N-2 sites in MBE grown samples.