| Surface Plasmon Resonance Enhanced Highly Efficient Planar Silicon Solar Cell |
Lin-Bao Luo,* Chao Xie, Xian-He Wang, Yong-Qiang Yu, Chun-Yan Wu, Han Hu, Ke-Ya Zhou,* Xi-Wei Zhang, Jian-Sheng Jie*
Abstract:Metal nanoparticles (NPs) induced surface plasmon resonance (SPR) is of great interest for efficient controlling over light's propagation and absorption in optoelectronic devices applications. In this work, we proposed a simple strategy to improve the photocurrent of planar silicon (Si) p-n junction solar cells by attaching plasmonic Au nanoparticles (AuNPs) onto transparent graphene film to enhance incident light harvesting. Finite Element Method based simulations reveal that the strong light scattering by AuNPs is responsible for the optical absorption enhancement within Si, leading to the increase in photocurrent. In addition, decoration of AuNPs on graphene also contributes to a high fill factor (FF) by reducing series resistance in the circuit. These contributory factors, together with the effective surface passivation of Si yield a power conversion efficiency (PCE) as high as 10.15%, with excellent reproducibility. This study will open up new opportunities for the optimization of Si based optoelectronic devices.
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