In plasmonic solar cells, absorption enhancement is mainly related to its active layer thickness. A thin active layer with metal nanoparticles (NPs) provides an efficient absorption enhancement.
The absorption enhancement is highly related to the scattering cross-section of the NP.
It is able study the scattering cross section of NP, which incorporated in the active layer of polymer solar cells, with numerical method such as finite difference-time-domain (FDTD) simulations.
I need to know whether this scattering cross-section has any dependence on the thickness of the active layer.
Dear colleague Shamjid Palappra
Have a nice time and good day.
You can try different film thickness and check the scattering cross-section.
Any how the scattering cross-section may increase by the increasing film thickness.
I wish this is useful and help you.
Yours
A. El-Denglawey
Scattering cross-section is defined as the intensity of the light scattered in an angle divided by the intensity of the incident light. At infinity, which means at distanced much larger than the wavelength. I doubt this is of any interest for you. What you want to know in the enhancement of the absorption. Actually, even the rate of charge carrier generation. This is the real problem and the electrodynamical part is the easiest. If you want to know is the near electric field would depend on the thickness of the film, it would. If the thickness of the film is comparable with the wavelength you have to expect interference. If the thickness of the film is smaller than the wavelength you'd have boundary conditions at the interfaces. Some light would be reflected, of course. So, you have to solve the field problem taking into account the film, the absorption in the medium. Is your nanoparticle much smaller than the film thickness?
The important parameter is the refractive index contrast between the scatterer and the medium in which it is immersed. The thickness may change the regime depending on wavelength of light being scattered, meaning the regime may move from near-field to far-field. I would do what Mr. Eldenglawey suggests and do a number of numerical experiments.
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