TiO 2 electrodes adsorbed with two natural dyes (gardenia yellow and monascus) were used as sensitizers to improve the conversion efficiency of cocktail dye-sensitized solar cells (CDSC) for light harvesting over a wide range of wavelength. Adsorption and electrochemical properties of two dyes were evaluated based on adsorption kinetics and electrochemical measurements. In addition, the photovoltaic performance of a photo-electrode adsorbed with single-dye (gardenia yellow and monascus) or the mixture or successive adsorption of the two dyes, was evaluated from current–voltage measurements. Layered co-sensitization of the two natural dyes was compared depending on the adsorption modes. As for the TiO 2 electrode with successive adsorption of monascus and gardenia yellow dyes, the solar cell yields a short-circuit current density (J sc ) of 2.04mA/cm 2 , a photovoltage (V oc ) of 0.63V, and a fill factor of 0.64, corresponding to an energy conversion efficiency (η) of 0.82%.