Changes

Jump to navigation Jump to search
Line 106: Line 106:  
Image:SolarCellLightPath.jpg|Fig 1: is a diagram of how light (the yellow line) enters the solar cell.  It first passes through "A" (the blue region) which is the anti-reflective layer of the cell.  The sunlight then travels through, "B," (the green layer) the material the cell is made of, e.g. silicon, gallium arsenide, etc.  Then the rays travel the the backing material, "C," (the gray region) which is normally made of aluminum.  At this point the photons which remain unabsorbed are reflected off of the backing nd ravel at an angle back out of the cell through both "A" and "B."     
 
Image:SolarCellLightPath.jpg|Fig 1: is a diagram of how light (the yellow line) enters the solar cell.  It first passes through "A" (the blue region) which is the anti-reflective layer of the cell.  The sunlight then travels through, "B," (the green layer) the material the cell is made of, e.g. silicon, gallium arsenide, etc.  Then the rays travel the the backing material, "C," (the gray region) which is normally made of aluminum.  At this point the photons which remain unabsorbed are reflected off of the backing nd ravel at an angle back out of the cell through both "A" and "B."     
   −
|Fig 2:      
+
Image:Betterphotonabs.jpg|Fig 2: is a diagram showing how better photon (or light rays-the yellow arrows) absorption can be achieved by using materials that diffract (bottom circles) the rays of light so they stay in the material that absorbs the light's energy longer. by creating a lower exit angle (left) the ray's energy stay in the cell longer thus allowing for more absorption.  Similarly, if the rays bounce around more (right) the energy is again in the system longer allowing for more time for absorption.         
 
</gallery>
 
</gallery>
  

Navigation menu