The sun has enormous potential to meet the world's growing energy needs, but compared to more conventional energy sources, such as fossil fuels, such energy is prohibitively expensive to execute. The high cost of a photovoltaic system is caused by factors such as low conversion efficiency, lower energy density of solar radiation, expensive raw materials, and labor-intensive production processes. Nanoscience and nanotechnology developments over the past 10 years have created new opportunities for the development of efficient solar cells. It is now possible to construct semiconductor, metal, and polymer nanostructure designs for solar cells. Studies in theory and modeling have also been helpful in understanding the optical and electrical processes related to photovoltaic conversion. The widespread use of solar energy is hampered by the expensive price and low efficiency of modern solar cells. Thanks to nanostructured materials, one-dimensional (1-D) nanomaterials in particular have opened up new design possibilities for more effective solar cells. These 1-D nanostructures—including nanotubes, nanowires, and nanorods—offer tremendous prospects to increase the efficiency of solar cells by improving photon absorption, electron transit, and electron collecting. A two-dimensional, atomically thin hexagonal lattice of carbon atoms is called graphene. The structure of graphene, is with each carbon atom shares three of its four electrons in covalent connections with its closest neighbors (sp2 bonds), that gives the extraordinary mechanical capabilities. The remaining fourth electrons, which account for most of the material's optoelectronic properties, are delocalized across the two-dimensional lattice at the same moment. Additionally, graphene is renowned for having greater mobility than excellent metals. Furthermore, a variety of compositions can be produced using low-cost, easy, and large-scale methods since a number of solution-based techniques, including basic spin coating, may be utilized to manufacture thin films of graphene. In this study, a solar cell made of graphene is modeled and examined using the finite element method