Recent Advances of Graphene in Solar Cell Applications

There has been incredible progress so far in graphene (Gr)-based solar cells and this is going to continue well into the future. Therefore, it is important to get an idea of the recent progress of graphene-based solar cells in the last decades. In this chapter, a brief overview of the recent research on Gr in solar cell applications has been outlined. It is prominent that Gr has been used in heterojunction solar cells, GaAs solar cells, Dye-sensitized Solar cells (DSSC), Perovskite solar cells, Polymer solar cells, and organic solar cells. In these solar cells, Gr has been utilized either as an absorber layer, hole transport layer, or electron transport layer. However, Gr has been used in the form of thin film, flakes, or quantum dot form. About 25% output efficiency has been observed in Gr-based solar cells so far. This chapter gives an overview of the Gr-based solar cell with efficiencies to further continue the research on Gr-based solar cells to achieve higher efficiency.