The reflection losses of the silicon solar cells are significant, and minimization of such losses can be facilitated by antireflection coatings (ARC). In this work, theoretical investigation on the optical properties of ZrO2 and HfO2 thin films working as ARC is carried out. Further, the permittivities of these ZrO2 and HfO2 is manipulated by doping with metals like Ag, Ni and Co. Optimization of the filling fraction of the metals in the HfO2 and ZrO2 improved the stability and durability of these thin film ARCs as well as reduces the optical losses to a greater extent. By the application of the ARCs, the absorbed photon flux increases and hence improvement in the efficiency of the solar cell is observed