|MadSci Network: Physics|
In my studies about light and solar energy, I have come across the fact that solar cells are only 15-25% effective in utilizing sunlight because they need to be hit with photons of a certain range of energy levels. Any photon that has a higher or lower energy level than this required range does not have any effect on the solar celll. If these photons could be somehow homogenized into ones with the right energy levels, then a lot more solar energy can be processed by solar cells. Thus, I wish to know if it is possible to change photon energy levels, whether by shearing off energy from a photon that has too much energy, or by merging together two weak photons to produce an acceptable photon.
Re: Is it possible to change the energy level of a photon?
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