Porous CdS:CdO composite structure formed by screen printing and sintering of CdS in air

Abstract A porous CdS:CdO composite structure was formed by screen printing of CdS powder and sintering in air at high temperature. The X-ray diffraction analysis of CdS sintered at different temperatures revealed that a CdO formation in the CdS matrix is by the phase transformation of CdS, which may be stated as CdS–CdSO 4 –CdO. The structure, composition and photosensitivity of this composite structure depend on the sintering temperature, sintering atmosphere and the flux to semiconductor ( F / S ) ratio. The results indicate that the screen printed CdS:CdO structure may be used as a photoconductor in solid state devices and as a photoelectrode in photo-electro-chemical energy conversion systems.