Why are solar panels blue?

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Cameron

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Why are solar panels blue?
« on: 10/03/2011 17:30:02 »
Cameron asked the Naked Scientists:
   
Why are solar panels blue? And can their colour be changed?

What do you think?
« Last Edit: 10/03/2011 17:30:02 by _system »

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Offline SeanB

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Why are solar panels blue?
« Reply #1 on: 10/03/2011 19:01:25 »
The blue colour is an intrinsic property of the material ( silicon) used in cheaper cells. If you move to more efficient cells, like Gallium Arsenide, the cells are a much darker colour, also a property of the material used.