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Solar Cell


— Science

"Decorated" nanowires could lead to better batteries and solar cells

By - May 1, 2012 3 Pictures
Higher-density batteries, more efficient thin-film solar cells, and better catalysts may all soon be possible, thanks to a new technique that allows nanowires to be “decorated” with nanoparticles. Using the novel technology, scientists from Stanford University have been able to festoon the outside surfaces of nanowires with intricate chains of metal oxide or noble metal nanoparticles, thereby drastically boosting the effective surface area of the nanowires. Other researchers have previously tried to achieve the same end result, but apparently never with such success. Read More
— Environment

Cheap, stable, printable liquid solar cells developed

By - April 26, 2012 2 Pictures
Scientists at the University of Southern California (USC) have developed technology to cheaply produce stable liquid solar cells that can be painted or printed onto clear surfaces. The technology relies on solar nanocrystals that are around four nanometers in size - meaning you could fit more than 250 billion on the head of a pin. Their size allows them to be suspended in a liquid solution so they could be printed like a newspaper. The downside, commercialization of this technology is still years away. Read More
— Environment

Dow Solar rolls out Solar Shingles in California and Texas

By - April 25, 2012 5 Pictures
Installing photovoltaic panels is certainly the most common method of generating solar power on a rooftop, and in fact many people might think it’s the only method. There is, however, an alternative – photovoltaic shingles. It makes sense, when you think about it ... why install weatherproof shingles and solar panels separately, if you could get one thing that combined both? Although there aren’t many manufacturers offering such products just yet, this month Dow Solar made its POWERHOUSE Solar Shingles available to consumers in northern California and central Texas. Read More
— Environment

Counterintuitive “LED-type” solar cell breaks efficiency record

By - April 24, 2012 2 Pictures
When you think of a solar cell, you probably think of something designed to absorb as much sunlight as possible. What you probably don't think of is something that is also capable of emitting light. Nonetheless, that’s exactly what a new prototype device designed more like an LED does, and it recently set an efficiency record for flat-plate single junction solar cells. Read More
— Environment

“Photochemical upconversion” could allow conventional solar cells to break 40% efficiency

By - April 22, 2012 2 Pictures
While the overall efficiency of conventional silicon solar cells has continued to improve in recent years, the technology faces a natural theoretical limit at around 33%. This is because the laws of physics prevent the cells from absorbing photons below a certain energy level, meaning that this low-energy light cannot be converted into electricity is simply lost. Now researchers have found a way join two energy-poor red photons to form a single energy-rich yellow photon, allowing the harvesting of this part of the spectrum currently unused by single p-n junction crystalline silicon solar cells, and potentially enabling a record-breaking efficiency of 40%. Read More
— Environment

3D solar towers offer up to 20 times more power output than traditional flat solar panels

By - March 26, 2012 2 Pictures
While we’ve looked at the development of solar cell technologies that employ nanoscale 3D structures to trap light and increase the amount of solar energy absorbed, MIT researchers have now used 3D on the macro scale to achieve power output that is up to 20 times greater than traditional fixed flat solar panels with the same base area. The approach developed by the researchers involves extending the solar cells upwards in a three-dimensional tower or cube configuration to enable them to better capture the sun's rays when it is lower on the horizon. Read More
— Science

Carbon nanotube solar cells point to possible transparent solar window future

By - March 23, 2012 3 Pictures
Imagine if every window of the 828-meter (2,717-foot) high Burj Khalifa in Dubai was capable of generating electricity just like a PV panel. That's the promise of solar window technology like the RSi and Sphelar cells systems. Rather than using costly silicon for window-based collection of solar energy, Dr Mark Bissett proposes using a very thin layer of carbon nanotubes instead. Read More
— Environment

3D solar cells could be integrated into solar roof tiles

By - March 20, 2012
Home owners looking to embrace solar but concerned about the effect slabs of solar panels will have on the look of their house may soon have an option that blends the old with the new. California-based company Solar3D has announced it is conducting a study to explore the potential for integrating its solar cells directly into roof tiles. While conventional solar cells aren’t really suitable for roof tiles due to their fixed orientation, Solar3D believes its 3D solar cell technology could make such a product feasible. Read More
— Environment

New production process could cut solar cell prices by half

By - March 15, 2012 2 Pictures
Boosting solar cell efficiency is seen as a key factor in making them more practical, but there is another way of looking at the matter ... if the price of those cells were lowered, we could generate more power simply by using more of them. That’s where Mississippi-based Twin Creeks Technologies comes into the picture. The company has developed a method of making crystalline silicon wafers which it says could reduce the cost of solar cell production by half. Read More
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