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Author Topic: 90% Efficient Solar Panel  (Read 14456 times)


Free Energy | searching for free energy and discussing free energy

90% Efficient Solar Panel
« on: March 22, 2010, 08:20:51 AM »

Offline capthook

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Re: 90% Efficient Solar Panel
« Reply #1 on: March 22, 2010, 10:55:20 PM »
25% cell efficiency is the current laboratory record.

Your info relates to *photon* absorbtion (already was at 80%+), not *cell* efficiency.

A primary reason for the difference between cell efficiency and photon absorbtion is that many electrons re-combine with the 'holes' created in the P-N junction before they can exit as usable power.

Offline 4Tesla

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Re: 90% Efficient Solar Panel
« Reply #2 on: March 23, 2010, 02:02:22 AM »
25% cell efficiency is the current laboratory record.

Your info relates to *photon* absorbtion (already was at 80%+), not *cell* efficiency.

A primary reason for the difference between cell efficiency and photon absorbtion is that many electrons re-combine with the 'holes' created in the P-N junction before they can exit as usable power.

I don't see anywhere where it is stated the photon absorption efficiency is different from the cell efficiency.. can you provide a link?

Thanks,
4Tesla

Free Energy | searching for free energy and discussing free energy

Re: 90% Efficient Solar Panel
« Reply #2 on: March 23, 2010, 02:02:22 AM »
Sponsored links:




Offline Rapadura

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Re: 90% Efficient Solar Panel
« Reply #3 on: March 23, 2010, 02:30:10 AM »
Improvements on cell efficiency are good... The greater the efficiency, it's better.

But  costs are important too. Greater efficiency have to be achieved with lower costs.

Using sunlight concentrators (lens, mirrors) is the best way to minimize costs, because it reduces the area of the photovoltaics panels itself (the photovoltaic panels are the most expensive part of a solar device). Of course, the greater the efficiency of the photovoltaics panels, greater will be the efficiency of the whole device that uses sunlight concentrators.

The goals in the field of photovoltaics are: more efficiency, in a smaller area, with lower production costs and greater durability.

The day when humanity can produce electricity from solar panels with a cost of 2 cents per kilowatt-hour, there will be no more need to research overunity and magnet motors, because all energy problems will be solved.

[EDIT] In order to make sunlight concentrators with very low cost, I think this is a good idea:

http://peswiki.com/index.php/Directory:Cool_Earth_Solar


Offline 4Tesla

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Re: 90% Efficient Solar Panel
« Reply #4 on: March 23, 2010, 07:10:24 AM »
Did you see this link from above?
Solar Cells Breakthrough: 1/50th the Cost, 90% Efficient
http://grantlawrence.blogspot.com/2010/02/solar-cells-breakthrough-150th-cost-90.html

4Tesla

Free Energy | searching for free energy and discussing free energy

Re: 90% Efficient Solar Panel
« Reply #4 on: March 23, 2010, 07:10:24 AM »
Sponsored links:




Offline capthook

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Re: 90% Efficient Solar Panel
« Reply #5 on: March 23, 2010, 07:40:14 AM »
Yes.  That link mixes it's numbers.

' In tests, the experimental solar cells demonstrated over 90 percent quantum efficiency, compared with 25 percent for the best silicon solar cells. '

It is comparing a 90% quantum efficiency with an overall 25% efficiency.

quantum efficiency = basically how many electrons are knocked loose by a light source/photon.  The higher the better.  80%+ or so is basically avg.

cell efficiency (or Energy conversion efficiency) = subtracting out all losses in the system when harvesting the energy.

'The losses of a solar cell may be broken down into reflectance losses, thermodynamic efficiency, recombination losses and resistive electrical loss. The overall efficiency is the product of each of these individual losses.'

http://en.wikipedia.org/wiki/Quantum_Efficiency_of_a_solar_cell

http://pvcdrom.pveducation.org/CELLOPER/QUANTUM.HTM

So an increase of QE from 80% to 90% is a worthy accomplishment, the cell efficiency would still be far below 50%.

Offline mscoffman

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Re: 90% Efficient Solar Panel
« Reply #6 on: March 23, 2010, 06:52:32 PM »
Yes.  That link mixes it's numbers.

' In tests, the experimental solar cells demonstrated over 90 percent quantum efficiency, compared with 25 percent for the best silicon solar cells. '


Well that is hard to say...They had the optical photon antenna idea
proved for a number of years. Now, they have the photon antenna as
a silicon wire mass produced in a plastic substrate base idea working...
they have yet to get the "how to rectify optical photon freq. to an electrical
signal working and aligned with the antennas, and/or how to step up
the rectified voltage to a useful level based in a plastic substrate idea
working yet.  :)

If and when they do, I suspect their results will come in somewhat better
then 50% eff. level.

:S:MarkSCoffman

Free Energy | searching for free energy and discussing free energy

Re: 90% Efficient Solar Panel
« Reply #6 on: March 23, 2010, 06:52:32 PM »
Sponsored links:




Offline capthook

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Re: 90% Efficient Solar Panel
« Reply #7 on: March 27, 2010, 01:11:16 PM »
If and when they do, I suspect their results will come in somewhat better
then 50% eff. level.

Due to the losses mentioned in my last post...
 'The losses of a solar cell may be broken down into reflectance losses, thermodynamic efficiency, recombination losses and resistive electrical loss. The overall efficiency is the product of each of these individual losses.'


... the theoretical maximum efficiency for a solar cell is ~42%.
This limit has been achieved via multi-junction cells in the laboratory (very $$).
While things like terminal velocity or the constant of gravity are 'law', *maybe* someday this 42% limit may be surpassed - might *not* be a 'law' - but according to any currently known science it is.

Offline triffid

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Re: 90% Efficient Solar Panel
« Reply #8 on: March 27, 2010, 02:49:14 PM »
test

Free Energy | searching for free energy and discussing free energy

Re: 90% Efficient Solar Panel
« Reply #8 on: March 27, 2010, 02:49:14 PM »
3D Solar Panels

Offline triffid

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Re: 90% Efficient Solar Panel
« Reply #9 on: March 27, 2010, 03:04:59 PM »
The following site has an article where the inventor cut the costs of production of his A panels in half.Lost control of his company and the new management decided not to pass on the savings to the public.So what? You can cut the cost by 90% only to have the management keep all the savings?Seems like to me GREED keeps rearing its ugly head.Triffid
http://www.thegreenerhome.com/eblog/whatever-happened-to-low-cost-solar-power/
« Last Edit: March 27, 2010, 03:30:30 PM by triffid »

Offline triffid

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Free Energy | searching for free energy and discussing free energy

Re: 90% Efficient Solar Panel
« Reply #10 on: March 27, 2010, 03:29:06 PM »
3D Solar Panels

 

OneLink