Titanium dioxide and copper doped Titanium dioxide thin films with different concentrations have been prepared by sol -gel dip coating technique and were annealed at 400°C for 3 hours in muffle furnace. The annealed films were characterized by X -Ray diffrac tion, UV -Visible spectroscopy, Atomic Force Microscopy, Scanning Electron Microscopy and Energy dispersive spectroscopy techniques. It was found that in Cu -TiO2 thin films crystallite size shrinks and absorption raises with the increase in Cu concentration of the film. Chlorophyll pigments play an i mportant role in photosynthesis. Chlorophyll benefits the human body in a number of distinct and unique ways. UV light impairs photosynthesis and increased exposure of UV light reduces size, productivity and qua lity of chlorophyll in many of the crop plants. Here, we have studied the effic iency of UV absorbing effect of Cu -TiO2 thin films on the protection of chlorophyll content of medicinal leaves such as Acalyphaindica and Phyllanthusamarus.