Davis, D. and Sudheer, K. 2025. Graphene Oxide and Reduced Graphene Oxide as Hole Transport Layers for Improved Efficiency in Fullerene-Based Bulk Heterojunction Organic Solar Cells: A Numerical Simulation Study . East European Journal of Physics. 1 (Mar. 2025), 217-232. DOI:https://doi.org/10.26565/2312-4334-2025-1-23.