Recently, Sol Voltaics of Sweden stated that, without significantly increasing production costs, the use of nanowire inks can increase solar panel conversion efficiency by as much as 25%, making solar power cheaper.
Sol Voltaics plans to explore a new way to extract a nanowire from gallium arsenide. This material has long been used to make solar cells and has advantages that other materials (such as silicon) do not have, but the price is also very high.
The company claims that by suspending nanowires in liquids and painting them with a surface with the ends facing up (like the leaves of a beard and grass), it can produce as much electricity as it does with less gallium arsenide. Solar panels.
David Epstein, CEO of Sol Voltaics, said: "The material needed to cover one square meter is less than one gram."
Epstein said that by smearing on the surface of objects such as glass, this method can create new solar panels. After smearing on existing solar panels, a given surface area can generate more power.
A 25% increase in efficiency can result in fewer panels producing a certain amount of power. Conversely, the same amount of solar panels can generate more power. For example, a 200-watt panel is a 250-watt panel after applying this overlay. Of course, this requires early-stage costing. However, compared with the huge benefits, this is insignificant.
Sol Voltaics was founded by Professor Lund Samuelson, a professor at Lund University in Sweden and a famous scientist in nanotechnology. Samuelson's research is based on a process called "aerotaxy."
Chip manufacturers and other manufacturers often use gases to deposit materials on fixed surfaces such as silicon wafers. In contrast, by applying aerotaxy, nanowires are continuously formed on the gold nanoparticles as the gold nanoparticles flow in the gas-filled chamber.
Ultimately, these gold nanowires are collected and stored in a liquid that can be used in processes like inkjet printing. Sol Voltaics does not manufacture solar panels on its own, but instead plans to set up factories to produce and sell the liquids and sell them to existing solar panel manufacturers to increase conversion rates.
Epstein said: "We call it ink and we will be an ink factory."
So far, Sol Voltaics only showed solar cells made of indium phosphide nanowires. However, the company expects to display solar cells using GaAs nanowires at the end of 2013 and begin large-scale commercial production in 2016.
So far, Sol Voltaics has raised US$11 million from Swedish investors and expects to raise another US$10 million to US$20 million this year. The company expects at least 50 million US dollars to start mass production.
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