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2 watt  monocrystalline solar cells – Click on picture for placing an order.

Superior Class A Monocrystalline Solar Cells. These cells have no facial marring and a uniform deep blue phosphorous layer. These cells are used to create high-quality, DIY solar panels and can be assembled in series to make solar modules that exceed production quality, while saving hundreds of dollars off retail.There are now alot of online sellers selling Evergreen,Motech and German castoff cells that do not rate as the advertised wattage or are thin line errs.We have never done this and never will.We do not prey upon the lack of knowledge of new,inexperienced buyers and want solar accepted and used as widely as possible.Its is not only good for business but the future of solar energy! This sale is for 36 solar cells.

• 2 Watts
• .5 Volts
• 4 Amps
• 16% Efficiency
• 125 MM

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Traditional solar cell, “Thin-film does not mean its off”

Higher efficiency yields benefits in limited areas
Given the persistently high price of crystalline silicon solar cell manufacturers increasingly set the thin-film technologies that do not require the expensive raw material. So will the German photovoltaic specialist aboard Q-Cells in the CIGS technology and has formed a joint venture with the Swedish Solibro. According to experts, means the increasing involvement of producers in terms of thin film but not the end for the traditional solar cell. “We tend to see the film cells as a supplement,” said Sal Oppenheim analyst about Stephan Wulf.
Especially in the effectiveness, the silicon cells currently in the lead. “Especially in applications that require higher efficiency and greater output – such as the use of limited space – have the advantages of silicon cells,” says Wulf. By 2010, analysts project a global market share of thin-film technologies of around 20 percent. Until then, should the silicon prices have relaxed high, which presses currently on the mood of the solar industry.
Q-Cells, claims to the second largest manufacturer of solar cells, its existing technology portfolio will in any event extend to the thin-film CIGS technology. In the planned joint venture with Solibro, the company has secured a share of 67.5 percent and pays for the time being four million €. The payment of a further 20 million euro makes Q-Cells on the achievement of technological milestones dependent. Plans to build a factory in Thalheim with an annual capacity of 25 to 30 MW. For the first stage of Q-Cells will spend about 60 million €.
Already reached Solibro – a spin-off of the renowned Angstrom Solar Center, Uppsala University – at its pilot line modules with efficiencies of 11.5 percent. Under laboratory conditions had already been achieved efficiencies of up to 16.6 percent and 18.5 percent in mini-modules for cells, says Q-Cells. By comparison, the U.S. solar manufacturer SunPower has achieved in his latest classical solar cells after reported a conversion efficiency of at least 22 percent

Novel light collecting surface developed

Professor Martin Green shines like a champ. The physicist from the University of New South Wales in Sydney has established the efficiency record for silicon solar cells. 24.7 percent of the incident light energy can transform Green’s solar cells into electrical current. Commercial Photovoltaic modules bring it up to 15 percent.

And so no one can doubt his world record, Australian researchers his record solar cell to the control of independent scientists in Sandia National Lab in the United States can be measured. The mystery of the “Perl” called solar cells from laboratory greens are tiny, pyramid-shaped depressions on the light-collecting surface.

On the slopes of these inverted pyramids incident light can be reflected so that it meets again on the silicon surface – that is, as it receives a second chance to absorb, if it has not been swallowed at the first contact of the silicon. Also located beneath the pyramids, an anti-reflective coating, which promotes the absorption of the incident photons.

The 25 percent efficiency of solar cells are Perl already close to the theoretical limit of 31 percent for conventional solar cells made of silicon. But who says that solar cells need to be conventional and silicon? “Basically, efficiencies are possible of up to 95 percent,” says Green, the thermodynamic limit for the conversion of light energy into electricity. So there is still much to do for the dynamic physicist who has been nominated two years ago as director of the newly founded Research Center for the 3rd generation solar cells.

The first generation of solar cells is made of silicon. Virtually all the modules in use today belong to it – whether they come in pocket calculators or house roofs. Started their commercial use was in 1958 – in space.

A second generation of solar energy technology is about to accomplish the leap from research laboratories into practice: the so-called thin-film solar cells. You can relatively cheap and large areas of glass by coating with suitable semiconductor materials – such as copper indium diselenide or polycrystalline silicon – are produced. The reduced up to ten times the production cost of thin-film solar cells in comparison to the first-generation solar cells are likely in practice to offset the disadvantage of a somewhat lower efficiency of only about ten percent.

Although the team of Professor Green and on the further improvement of solar cells of the first and second generation works, but the main focus is those future technologies, the institute gave its name after all. “The third generation of solar cells will be as cheap as the thin-film technology, but efficiencies allow up to 80 percent,” Green formulated his research objective. And he has been pursuing a number of ideas that this breakthrough for a wide use of solar energy technology could be possible.

A relatively simple and already the supply of satellites used method is the series connection of several solar cells that are sensitive to different frequency components of sunlight. Triple-A solar cell made Gallium-Indium-Phosphor/Galliumarsenid/Germanium already achieved more than 30 percent efficiency. With a further, fourth cell, the efficiency will then soon be at 40 percent. “In theory”, explains Green, “the limit for the efficiency of a four-layer cell at 68.8 percent.”

Still, the tandem, triple or four-layer solar cells for the normal market are far too expensive. But if we succeed in uniting the various cells in a single layer system, a low-cost mass production could be possible.

Green also explores new solar cells that use “hot carrier”, “Multi line tape”, “quantum dots” or multiple quantum walls. Their operating principles are based on complex solid state physics. But always, it is ultimately about making the capture of light particles and their conversion into electric charge carriers for the usable power efficiently.

Great expectations for Green in the “thermo photonic cells” that can convert not only light but also heat into electricity. Technological heart is a special ceramic with rare earth atoms, the heat in nearly monochromatic light can transform. This laser-like light can again be converted very efficiently by a suitable solar cell into electricity.

“In principle, this technique has an efficiency of 85.4 percent possible,” said Green. Such a value would not only be revolutionary for the solar technology, the waste heat from conventional power plants could be the use of economic efficiency. Green can even imagine that the special ceramic is heated by a gas burner and then played through the intermediate step of “light” electric energy – and more efficient than any existing power plant.

The research on silicon solar cells have the Green introduced along the way another world record. From his lab are also the most luminous silicon LEDs. They are ten times more efficient than the best systems elsewhere. In principle, these are Perl solar cells – also work vice versa very effective as a light source – power.

The silicon diode is of a new age of computer technology, believes Green: “It will provide three-dimensional chips.” The 3D chips consist of several layers of silicon, which can exchange via tiny Perl-emitting diodes and solar cells each other Perl-contact data and communicate. , It predicts Green, “then the entire interior of a PC is” “in a small cube can be accommodated.”