Abstract. The chemical bath deposition (CBD) method was used for preparation of ZnO and ZnO-SnO2 nanocomposite films. Characterizations were made on their structural, microstructural and optical properties by X-ray diffraction (XRD), scanning electron microscopy(SEM) and ultraviolet-visible (UV-VIS) spectroscopy. The photoelectrochemical properties such as open circuit voltage(Voc), short circuit current density(Jsc), conversion efficiency(η) and fill factor(FF) of ZnO and ZnO-SnO2 nanocomposite films based DSSC were studied. Onion skin natural dye sensitized solar cell fabricated from ZnO and ZnO-SnO2 nano-composite generated conversion efficiencies of 0.66 % and 0.81 % respectively.