X-ray photoelectron spectroscopy of Zn_(1-x)Cd_xSe thin films

摘要

X-ray photoelectron spectra (XPS) have been recorded for electron beam deposited Zn_(1-x)Cd_xSe (0 < x < 1) thin films on glass substrates at room temperature. The chemical composition (x), core level binding energies, Auger parameter (α) and ionicity (f_i) have been estimated from XPS data of these films. The films in general have shown selenium deficiency for all the compositions. The variation in Auger parameter for Zn, Cd and Se in the thin films with different compositions is not significant and is found to be for Zn (2011.3-2012.2 eV), for Cd (786.1-786.6 eV) and for Se (1360.2-1361.4 eV). The f_i values are in the range 0.639-0.680 depending upon the composition of the films. The effect of argon ion bombardment on composition has been investigated.