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Ultrathin Tandem-plasmonic Photovoltaic Structures For Synergistically Enhanced Light Absorption

Jafar Poursafar, M. Kolahdouz, E. Asl-Soleimani, S. Golmohammadi
Published 2016 · Chemistry

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Recently, plasmonic nanostructures have been playing a key role in enhancing the optical absorption in thin film solar cells, which are poor absorbers due to their decreased optical travelling path length. Here, we have proposed and simulated a tandem ultra-thin silicon solar cell, in which each layer is integrated with metal nanostructures, using the FDTD method. The Si layers are disconnected via a SiO2 layer with embedded Ag strips. The surface of the top Si layer and the underside of the bottom Si layer are connected to each other using contacts from a Ag periodic array nanostructure. The simulation results have demonstrated that the proposed structure has a synergistic effect on light absorption and gives rise to a 172% light absorption enhancement and 139% short-circuit current density enhancement over the whole usable solar spectrum, compared with the one layer bared structure.
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