Solar cell is a relatively new source of renewable energy and this technology is still in its development process, especially for perovskite-based solar cells (PSC) which use perovskite material as an active layer in the cell structure. The perovskite-based solar cell has very good potential to be one of the most efficient solar cells. Currently, the perovskite-based solar cell has achieved a value of efficiency of 22.7%, this value isn't the current highest efficiency value that solar cells could achieve. However, a rapid progression for this type of solar cell could be seen. In this research, the perovskite used is of CH3NH3PbI3 material that is made by a mixture of MAI salt and PbCl2. In this solar cell perovskite layer is the main material, which means finding the correct ratio and molarity to produce the most efficient mix of perovskite is very crucial. This PSC will be grown in between two Fluoride Tin Oxide glass or FTO glass. The solar cell fabricated will be layered in the following order: FTO glass, TiO2, CH3NH3PbI3, active carbon, and paraffin oil, that later on would be closed with another FTO glass. This research will give variables on the molarity of perovskite precursors, which is 0.4M, 0.42M, 0.44M, 0.46M, 0.48M, and 0.5M. It is assumed that the most efficient perovskite particle amount is around 0.4M to 0.5M. From the result of the testing and measurement, it could be concluded that the highest result is 0.48 M with a value of 1.48 V Voc, 0.7 mA Isc; and 0.365 fill factor with a number of efficiency of 0.569 %.