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The other main area of efficiency development delves into making layered cells that use varying materials for stacked cells.  These newly conceived solar cells focus on capturing photons across a wider range of the the spectrum of light.  This means that as the light rays pass through these materials their differing wavelengths will be captured by different layers.  This can mean that while a normal cell will only take in the energy from a certain range of wavelengths, the accepted range can be increased thereby increasing the efficiency.
 
The other main area of efficiency development delves into making layered cells that use varying materials for stacked cells.  These newly conceived solar cells focus on capturing photons across a wider range of the the spectrum of light.  This means that as the light rays pass through these materials their differing wavelengths will be captured by different layers.  This can mean that while a normal cell will only take in the energy from a certain range of wavelengths, the accepted range can be increased thereby increasing the efficiency.
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==Research, Resources, and Citations==
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==Research and Resources==
    
Solar
 
Solar
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*http://www.energy.gov/energysources/solar.htm
 
*http://www.energy.gov/energysources/solar.htm
 
*http://www.technologyreview.com/Energy/18415/?a=f
 
*http://www.technologyreview.com/Energy/18415/?a=f
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*http://renewableenergytoday.net/rea/news/story?id=49483
    
Gallium Arsenide
 
Gallium Arsenide

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