Shape and Size Dependent Light Absorption Enhancement of Silver Nanostructures in Organic Solar Cells

Feng Shan; Tong Zhang

doi:10.4028/www.scientific.net/SSP.266.90

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HomeSolid State PhenomenaSolid State Phenomena Vol. 266Shape and Size Dependent Light Absorption...

Shape and Size Dependent Light Absorption Enhancement of Silver Nanostructures in Organic Solar Cells

Abstract:

Metal nanoparticles (MNPs) induced light absorption enhancement using for the improvement of power conversion efficiency of organic solar cells (OSCs) is a new research direction in photovoltaics. However, the device performance influence of the shape and size of MNPs has not been well investigated. In this paper, we focused on the comparison study of the optical absorption enhancement between silver nanospheres (Ag-NSs) and silver nanocubes (Ag-NCs) which are embedded in the active layer of OSCs using finite element method (FEM) simulation. Influence of the structural parameters, including the size and shape of nanoparticels, and their relative distance are systematically discussed. The results indicated that the light absorption enhancement employing Ag-NCs is much higher than that of Ag-NSs in the 300–800 nm wavelength range. Meantime, once the distance between the adjacent nanoparticles is well controlled, the optimal absorption enhancement factor of OSCs can be obtained. As the scattering cross-section of Ag-NCs is much higher than that of Ag-NSs over a broad wavelength range, the optimized light enhancement of Ag-NCs reaches 19 % which is 1.26 times higher than that of Ag-NSs.

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Solid State Phenomena (Volume 266)

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90-94

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https://doi.org/10.4028/www.scientific.net/SSP.266.90

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Online since:

October 2017

Authors:

Feng Shan, Tong Zhang*

Keywords:

Absorption Enhancement, Nanoparticles, Organic Solar Cells, Plasmonic

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