Originally Posted by Dulcesuenos
Aren't the types of panels put together to make the cells? P type is positive cell and n negative? Everything ive read says both types are combined. Can you ellaborate?
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I went and looked at the patent he mentioned in his post.
Yes, you're right, there is a P layer and an N layer. The electrons flow between the 2 layers, "activated" by the sunlight. This particular patent refers to an issue they call "polarization' in which the glass and frame becomes charged and reduces the output of the solar
panel in just a few days. The patent shows how a normal solar panel is constructed of glass, insulator, encapsulant, solar cell, encapsulant and backsheet, from top to bottom. The inventors added an extra layer of encapsulant between the glass and insulator, which supposedly helps prevent the solar cells from becoming polarized, and maintaining power output, even at temps. above 100*C.
The patent was filed by Sunpower in 2009, it was published in 2012.
The power losses in the patent graphs look pretty dramatic, I'm wondering if other mfrs. have discovered other ways to eliminate polarization since then, otherwise it seems to me that most panels would put out very little power, nowhere near their rated power levels.