Conditions Extrêmes et Matériaux : Haute Température et Irradiation

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P.Yu, J.P.Blondeau, C.Andreazza, E.Ntsoenzok, J.Roussel, P.Dutheil, A.L.Thomann, E.Mustapha, J.Meot, 'Surface Plasmon Resonance (SPR) Effect of Ag and Au Nanoparticles (Ag and Au NP) for Performances Enhancement of Thin Film a-Si:H Photovoltaic Devices', 2015 European Materials Research Society Spring Meeting and Exhibit (2015)

Thin-film a-Si:H solar cells offer the benefit of reducing material consumption and fabrication costs. However, such thin film reduces the efficiency, due to the decreased optical path length in a-Si:H layer and its poor light absorption at red and Near IR wavelengths. Ag and Au NP can exhibit strong localized SPR at these wavelengths. Once excited, surface plasmons decay, resulting in scattering and absorption as well. The NP optical properties depend on their size, shape, or the local dielectric environment. However, their optimal parameters in such cells are not actually well determined. Our work’s goal is to understand NP influence in such cells and to perform an optimal structure by increasing the absorption within the cell using NPs scattering and luminescence (optical trapping). Modeling based on Mie theory is carried out with bhmie program using bulk Palik data. Using these data, ultrathin Au and Ag layers were deposited on glass+SnO2 substrates respectively by evaporation and Plasma sputtering. According to the modeling, the experimental studies (SEM, UV-Visible and XRD measurement) confirm our hypothesis and show us the evidence of metal NPs and theirs SPR. Thin film a-Si:H solar cell prototypes were prepared by our industrial partners. The presence of NP in cell backside resulted in a performances improvement. The cells with Ag NP in the rear provide us an optimal structure with a ISC improvement of about 14%, observed between the SPR wavelengths of Ag NP (550~750)