COMPOSITIONAL ANALYSIS OF CDS SNO2 FILMS AFTER HEAT-TREATMENTS AND CDCL2 PRETREATMENTS/

We used Auger electron spectroscopy (AES) to perform a systematic stud y of CdS thin films grown from solution on SnO2-coated glass. The effe cts of heat treatments and CdCl2 pretreatments on the stoichiometry of the CdS and the diffusivity of the CdS/SnO2 interface have been inves tigated. The results show that CdS thin films not treated in CdCl2 bec ome sulphur-deficient with heat treatments above 350-degrees-C, where CdS thin films treated in CdCl2 must be heated above 350-degrees-C to be smooth and stoichiometric. We did not observe interdiffusion of ato mic species at the CdS/SnO2 interface after heat treatments of 350, 45 0 or 550-degrees-C.