Characterization of As-doped, p -type ZnO by x-ray absorption near-edge structure spectroscopy

The x-ray absorption near-edge structure (XANES) spectroscopy has been used as a "fingerprint" to address the unresolved issues related to the changes in the local structure around As and to identify its chemical state in the As-doped, p -type ZnO . The spectral features of both As K - and O K -edge XANES spectra strongly suggest that in the p -type state As substitutionally replaces O in the ZnO lattice, thereby forming As O , which is the acceptor responsible for p -type conduction in the As-doped, p -type ZnO .