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Thread: Light transformed to energy

  1. #1 Light transformed to energy 
    Forum Sophomore L.E.A.P.'s Avatar
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    Hi,
    I have a current personnal project involving energy absorbtion. If i use a solar cell and shine very condenced light on a small point of a solar cell, will it saturate the solar cell?


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    Forum Ph.D. william's Avatar
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    Hi LEAP,
    I believe the solar cell will be saturated at the point the light hits but not much beyond that. Astronomers doing spectroscopy have to deal with this all the time.
    Cheers,
    william


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    Forum Sophomore L.E.A.P.'s Avatar
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    Hmmm so I'd have to diffuse the light... What could i use to dissipate the light without loosing any energy?
    A magnifying glass about 5 cm away from the solar cell?
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  5. #4  
    Forum Ph.D. william's Avatar
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    This is a tough question I think.
    As far as a magnifying glass - any time light passes through a lens, you'll lose some energy. I do not know a way around this.

    Perhaps a diffraction grating??? A "specially shaped" mirror maybe??? Or maybe a lens is fine if you can live with a little energy loss....

    cheers,
    william
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  6. #5 Re: Light transformed to energy 
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    Quote Originally Posted by L.E.A.P.
    Hi,
    I have a current personnal project involving energy absorbtion. If i use a solar cell and shine very condenced light on a small point of a solar cell, will it saturate the solar cell?
    Your question has a fairly simple answer: Your only sensible first action would be to approach the manufacturere of the cell and ask for the specification. There are several different types of cell with widely different abilities and failure modes. Remember that not all the light is turned into electricity it also produces heat so you may find it's output just keeps going up till it melts ie if you have a cell lighting a 12volt 24watt lamp then the solarcell/panel must also be dissipating 24 watts of energy. You may very well find you will destroy the panel before saturation is reached if the small area you are lighting cannot dissipate this energy.
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  7. #6  
    Forum Sophomore L.E.A.P.'s Avatar
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    Would it be better to use superconductor corbon nanotubes?
    I heard it simply makes heat flow forever.
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    Quote Originally Posted by L.E.A.P.
    Would it be better to use superconductor corbon nanotubes?
    I heard it simply makes heat flow forever.
    better yet find out which wave length is causing the photo electric effect for the cell used.

    filter out the remaining wave lengths and then the saturation point of the cell can be maximized, recheck output; if you have an increased wattage, create a film and then patent it immediately.

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