Where to find a real world solar cell efficiency chart/table for different light wavelengths?
Where to find a real world solar cell efficiency chart/table for different light wavelengths?
(OP)
I'm confused on how to read solar cell efficiency vs wavelength charts
http://en.wikipedia.org/wiki/Quantum_efficiency

This chart suggests that external quantum efficiency is over 80% for wavelengths from about 500 to 1000 nm.
However this doesn't relate to real world efficiency because of bandgap effects.

http://solarcellcentral.com/limits_page.html
Where can I find a real world results solar cell wavelength efficiency charts or tables?
http://en.wikipedia.org/wiki/Quantum_efficiency
This chart suggests that external quantum efficiency is over 80% for wavelengths from about 500 to 1000 nm.
However this doesn't relate to real world efficiency because of bandgap effects.
http://solarcellcentral.com/limits_page.html
Where can I find a real world results solar cell wavelength efficiency charts or tables?





RE: Where to find a real world solar cell efficiency chart/table for different light wavelengths?
RE: Where to find a real world solar cell efficiency chart/table for different light wavelengths?
What's missing are the entire string of efficiencies that must multiplied to get the overall efficiency, as well as consistent/inconsistent definitions of what the efficiencies refer to.
> Internal QE is the ability of the bulk material to convert photons that enter the bulk material into electrons, but the 1st graph, I think, makes some assumptions about how the photoelectrons are collected. One issue is that the 1st graph is a photon quantum efficiency, and the graph would need to be converted into a power quantum efficiency to have decent correlation to the 2nd graph.
> External QE accounts for the reflective losses and other collection losses, but the 1st graph does not account for all the losses of photoelectrons, and makes assumptions about photoelectron collection
> Temperature effect on QE
> All of the above essentially enters into the Shockley Queisser limit, which is not inconsistent with your second graph, but there is not sufficient information to determine how the graphs correlate.
> Electrical losses
All of this is of academic interest, since we already know that commercial solar cells are no more than about 20% efficient.
TTFN

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RE: Where to find a real world solar cell efficiency chart/table for different light wavelengths?
If power required vs the cost of providing the collection area is high (as for spacecraft), well.. then these high efficiency cells become quite commercialy viable in their niche market.
Independent events are seldomly independent.
RE: Where to find a real world solar cell efficiency chart/table for different light wavelengths?
Each band is has minimal overlap, so the efficiencies do not necessarily add.
TTFN

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RE: Where to find a real world solar cell efficiency chart/table for different light wavelengths?
I hate Windows 8!!!!
RE: Where to find a real world solar cell efficiency chart/table for different light wavelengths?
TTFN

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