Direct evidence for Sb as a Zn site impurity in ZnO

摘要

The lattice location of ion implanted antimony in zinc oxide has been determined by means of β~- emission channeling from the radioactive ~(124)Sb isotope. Following 30 keV implantation of ~(124)Sb into a single-crystalline ZnO sample to a fluence of 1 × 10~(14) cm~(-2), the angular-dependent emission rate of β~- particles around several crystallographic directions was measured with a position-sensitive Si detector. The majority of Sb was found to occupy Zn sites, with the possible fraction on O sites being at maximum 5%-6%.