In this study, we have aimed to determine low-cost and highly efficient perovskite solar cell structures. We have used low-cost HTM, ETM and back contact to keep the materials cost as low as possible. To achieve higher efficiency, we have simulated several cell structures with highly efficient absorber materials where we have categorized the cells according to toxicity as a precaution. The HTM, ETM, back contact, and environment are all similar for all cell structures to determine the best cells. Initially, all cells are simulated with common ETM and HTM with equal thickness, temperature, series, and parallel resistance to select the best Pb-based and nontoxic absorber material-based cells. Optimization of material parameters and cell parameters is essential to improve efficiency. Hence, we have further simulated these two cells by varying thickness, electron affinity, defect density, doping density, temperature, series resistance, and back contact to improve the efficiency of those cell structures. Here, the mentioned material parameters are optimized according to efficiency. However, back contact material is chosen according to the efficiency and the price of back contact materials to achieve the goal of low cost and highly efficient cell structure.