Can an ultraviolet light or infrared light source power a solar cell?
If it can or cannot can you explain why? I need to know this for my science project on renewable energy
It depends on what material the solar cell is made from. If it's silicon (the most common) then the answer is yes.
A minimum energy is required to convert photons (light particles/wave packets) to electricity. As long as the photon has more than that energy then it will make electricity. For silicon, the minimum energy is in the infra red region, so IR will create power. Visible light is more energetic than IR, and UV more than visible. So these will also create power. But for one photon arriving, only one electron of a specific voltage is produced. Even though UV photons have enough energy to create many such electrons, they only produce one and the rest of the energy is wasted as heat. That is why simple solar cells are not very efficient.
where can i buy solar powered garden lights? are they expensive?
are they reliable? i want to do my part in helping save the environment by starting to use alternative power sources for my everyday needs. i've heard from someone before that they use garden lights that light up at night after being charged the whole day by the sun. i think it's a cool idea.
Try overstock.com
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