Abstract
Organic solar cells (OSCs) are preferred over inorganic solar cells because they are less expensive, lighter, and easier to manufacture. However, the power conversion efficiency of OSCs remains poor. One promising material for OSCs is PTB7:PC71BM, which has high electrical conductivity, solubility in various solvents, and the ability to be deposited over large areas at low temperatures using cost-effective techniques. All photogenerated excitons must split at the interface between the acceptor and donor materials in order to achieve high quantum efficiency. Additionally, all generated charges must subsequently reach their respective electrodes. Due to its strong mechanical, electrical, thermal, and optical properties, graphene oxide (GO) is a great material for the Hole Transport Layer (HTL) in OSCs. In this study, GO was used as the HTL in PTB7:PC71BM organic solar cells and the effect of GO on these OSCs were examined. SCAPA-1D simulation software was used to simulate the organic solar cells. The thickness of absorber layer has been optimised to be 400nm. We found that GO can improve the efficiency of OSCs by facilitating the dissociation of excitons and by improving the charge transport properties of the device. Our findings imply that GO is a potentially useful material for increasing OSC efficiency.
Published Version
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