▎ 摘　　要

Designing thinner, more efficient and cost-effective 2D materials/silicon Schottky photodiodes using the plasmonic concept is one of the most recent quests for the photovoltaic research community. This work demonstrates the enhanced performance of graphene-Si Schottky junction solar cells by introducing asymmetric spheroidal shaped Ag nanoparticles (NPs) embedded in a graphene monolayer (GML). The optical signatures of these Ag NPs (oblate, ortho-oblate, prolate and ortho-prolate) have been analyzed by discrete dipole approximation in terms of extinction efficiency and surface plasmon resonance tunability, against the quasi-static approximation. The spatial field distribution is enhanced by optimizing the size (a(eff) = 100 nm) and aspect ratio (0.4) for all of the utilized Ag NPs with an optimized graphene environment (t = 0.1 nm). An improvement of photon absorption in the thin Si wafer for the polychromatic spectral region (lambda similar to 300-1100 nm) under an AM 1.5 G solar spectrum has been observed. This resulted in a photocurrent enhancement from 7.98 mA cm(-2) to 10.0 mA cm(-2) for oblate-shaped NPs integrated into GML/Si Schottky junction solar cells as compared to the bare cell. The structure used in this study to improve the graphene-Si Schottky junction's performance is also advantageous for other graphene-like 2D material-based Schottky devices.