Optics and Photonics Society of Iran

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It is used different ways in order to increase the absorption of thin film solar cells. Roughen the surface, Use reflective layer under the cell and sensitization with metal nanoparticles such in. In this work, we use finite difference time domain (FDTD) method to analyze the plasmonic effect of Ag nanoparticles (NPs) on optical behaviour of thin film solar cell. Light absorption in the absorber layer is a key parameter to have an efficient cell. So in present work we utilize Ag NPs to enhance light absorption. By decorating Ag NPs on the cell, incident light will scatter and as well as if it is in the resonance frequency of electrons collective oscillations in the Ag NPs, then local surface plasmon resonances (LSPRs) will be excited that can increases field intensity around Ag NPs. The wavelengths of the sunlight with AM 1.5 intensity profile that intensity is higher, Absorption is increased by 20%. Reflection and scattering of light into the cell will be related to NPs distance. Seen that for a certain distance, absorption enhancement is higher. This distance for NP with diameters of 40 and 80 nm will be 40 and 60 nm respectively.

Keywords: Thin film solar cell, Ag Nanoparticles, Local plasmon, Light scattering

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