Most of the solar cells in volume production today are made with silicon. this plentiful natural resource makes up more then one fourth of the earths crust and is the chief component of ordinary sand. The silicon used in the production of solar cells must be purified to a very high degree.
When sun shine penetrates to the junction of the "N" type and "P" type Silicon cells layers it creates a flow of electrons through the crystal structure.
The Crystal structure of silicon contains empty areas which will accept which will accept electrons. As one electron moves to fill a hole, it creates another hole. It is the flow of electrons which produces electricity.
Sunlight contains many colors of light. Color and the relative power in each color of light is determined by the measure of the wavelength. Plots the relationship between wavelengths and color along the spectral distribution of ordinary day light.
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