Other concepts

In order to maximize the conversion efficiency of the solar cells and of the complete concentrating system, some CPV designs act onto the spectral properties of the light together with the geometrical ones. Each photovoltaic materials has the best photovoltaic performances for wavelengths with energy slightly higher than the semiconductor bandgap. A splitting of the incoming light or the wavelength shifts are tricks used in dichroic and luminescent concentrators to try to increase the PV conversion efficiency.

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