Abstract
Localized surface plasmon resonance displayed by metal nanoparticles has been studied in silver island films prepared by the simple technique of vacuum evaporation, which is one of the options that is easily adaptable for large area and low cost applications. Silver island films with varying island sizes and areal coverages are prepared by depositing silver films with varying thicknesses followed by annealing. The optical properties of the samples have been explained in terms of dependence of scattering and absorption on the metal island size, interparticle interaction and matrix effects, and the wavelength range over which the plasmonic effects are present.
Highlights
Plasmonic properties of metal nanoparticles present novel possibilities of plasmonic interaction with light which can subsequently be used to enhance the performance of solar cells [1, 2]
We have studied the effect of film thickness on the particle size and areal coverage of the metal islands obtained upon annealing, and have studied the direct, scattered, and total transmittance and the specular, diffuse, and total reflectance from these films
We have studied the effect of varying the film thickness on the island size and areal coverage of the silver island films
Summary
Plasmonic properties of metal nanoparticles present novel possibilities of plasmonic interaction with light which can subsequently be used to enhance the performance of solar cells [1, 2]. A number of methods exist for the synthesis of metal nanoparticles, one of the most commonly used methods for solar cell applications is vacuum evaporation of thin films followed by annealing [4, 5, 8]. This technique results in the formation of nanoparticles in the form of islands due to coalescence when the thin metal film is annealed. This presents one of the simplest ways for subsequent integration into the production line
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