Solar Panels - How do they absorb the energy?

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Offline Seany

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Solar Panels - How do they absorb the energy?
« on: 27/06/2007 21:47:40 »
How to they absorb the light/sun-ray energy and transfer it into electrical energy?
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Offline daveshorts

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Solar Panels - How do they absorb the energy?
« Reply #1 on: 27/06/2007 23:47:53 »
A solar cell is basically a diode - a one way valve for electricity. So electrons can't flow from the -ve side to the positive one, or at least they can't unless you give an electron a whole lot of energy eg by hitting it with a photon. Then the only way the electron can get back is by flowing all the way around the circuit doing some work in the process.