The cadmium seleniophosphate (CdPSe3) XPS and XAES spectra

The XPS and XAES spectra of the cadmium seleniophosphate (CdPSe3) single crystals have been measured, at room temperature, using Al Ka (1486.6 eV) X-rays source. The analyzed core level XPS spectra of the CdPSe3 compositional atoms have emphasized the absence of non-equivalent atoms in this compound. The cadmium 4d levels show a localized character according to the so-called transition-metal weakly interacting model. As regards the XAES spectra, the selenium L23M45M45 and cadmium M45N45N45 Auger series have been investigated and the nature of the CdÿSe bond has been analyzed by calculating the Cd modi®ed Auger parameter in CdPSe3. The deduced Cd modi®ed Auger parameter shift agrees well with the CdPSe3 energy bandgap Eg. # 2001 Elsevier Science B.V. All rights reserved