High efficiency solar cells

A method of increasing the efficiency of a solar cell material comprising:

• determining at least one set of energies selected from the group of energies consisting of desirable energies and undesirable energies from at least a portion of the photoreactive portion of the solar spectrum from that can be applied to a solar cell photovoltaic substrate material to result in the promotion of electrons to a conduction band, said conduction band being an inherent characteristic of said solar cell material;
• determining at least one means for filtering sunlight, such that said means for filtering reduces the amount of undesirable energies from at least a portion of the photoreactive portion of the solar spectrum from being incumbent on said solar cell material;
• and
• combining said at least one substrate material and said at least one means for filtering sunlight together in a solar cell.

A method for determining desirable energies from at least a portion of the photoreactive portion of the solar spectrum to be incident on a solar cell substrate material comprising:

• determining at least one primary band gap width present in a solar cell substrate material;
• determining at least one primary wavelength of a light corresponding in energy to said at least one primary band gap width;
• and
• determining at least one harmonic and at least one heterodyne of said at least one primary wavelength of light.