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Snowflake-shaped photovoltaic cells bring the holiday cheer
Sandia National Laboratories have unveiled their newest photovoltaic cells -- glitter-sized particles made of crystalline silicon. The cells are made using common microelectronic and microelectromechanical systems techniques, and the results are pretty spectacular to behold. More interestingly, however, is the fact that they use 100 times less material in generating the same amount of energy as a regular solar cell. Here comes the sun Bacteria for better solar panels Because of their size and shape, the cells are well-suited to unusual applications, and researchers envision mass-production of the cells for use on building-integrated tents or clothing, so campers (or military personnel) could recharge their cell phones on the go. Researchers also think that these particles will be inexpensive to produce, but there's no word on when they'll be ready for consumer application. We'll keep you posted -- but hit the source link for more a more detailed description.
Bacteria taught to spin microscopic gears right round, could make for better solar panels
With a name like Bacillus subtilis and a size of five microns you probably wouldn't expect much in the way of heavy lifting, but don't let first impressions fool you. This tiny organism has been taught by scientists at Argonne National Laboratory to spin little gears that weigh one million times more than the bacteria themselves -- that'd be like you lifting both an original Xbox and a PS3 at the same time! Applications are, apparently, endless, but the one that caught our eye involves photovoltaics able to "snag lots of photons from the sun." You know what that means: more juice for your Prius so you can crank that Dead or Alive CD guilt-free.
Sharp solar cell sets Conversion Efficiency record
The kids at Sharp have a long history of solar power development and research -- something which is evident in the solar cells they've attached to everything from televisions to cellphones. Always moving onward and upwards, the company is now announcing that it's achieved a title-holding 35.8 percent cell conversion efficiency through the use of a triple-junction compound cell. Mainly used on satellites, the triple-junction cell uses three photo-absorption layers and materials (such as indium gallium arsenide) to boost efficiency. This is all good news indeed for both people anticipating better solar devices and fans of solar research in general -- and great news for the people that make those 18 foot tall "solar flowers." PR after the break. [Via Akihabara]
DARPA on the lookout for robotic 'power skin'
DARPA has put out an RFI for something called Power Skin. The technology is conceived as a structural material that would provide "its own day and night power... to be used as an independent power source and, simultaneously, serve as the structural material" for robots (see our conceptual rendering above) and unmanned aerial vehicles. Ultimately, the military-industrial complex would like to see you develop something that would allow the aforementioned UAVs "indefinite flight endurance," although they'd be totally into it if you could demonstrate continuous flight for a mere four days. We're fairly certain that some of our more clever readers have already developed this technology, so why don't you hit the read link and see if you can't make a few bucks off it? Tell 'em Engadget sent you.[Via The Register]
Baby steps: new solar cell efficiency record isn't awe-inspiring
Granted, we've no idea what it takes to really push the efficiency level of a solar cell, but we're getting pretty bored with these incremental improvements year after year. If you'll recall, the record for solar cell efficiency sat at 40.7 percent in 2006, and that was raised to an amazing 40.8 percent last August. Today, researchers at the Fraunhofer Institute for Solar Energy Systems have announced an all new milestone: 41.1 percent efficiency. According to team head Frank Dimroth, the crew is simply "elated by this breakthrough." Meanwhile, the rest of planet Earth is suddenly depressed by the thought of perishing from old age before this data point ever breaks the big five-oh.[Via Gizmag]
Researchers create solar tie that charges, carries cellphone
There's certainly no shortage of folks working to incorporate solar cells into clothing and accessories, but a team of researchers from Iowa State University now look to have devised a way to make the wearable technology slightly more discreet, with them using digital textile printing to print fabric that matches the pattern of the solar cells. The solar cells themselves are then attached using a "liquid stitch" method, although that apparently presented its own set of problems, as the application of the cells made it difficult to tie a knot. As the researchers helpfully point out in thier paper, however, a clip-on tie would solve that problem. Combine that with the special pouch for carrying your cellphone, and you've got a combo that can't be beat.[Via textually.org]
New solar cell efficiency record (barely) achieved at 40.8%
Just under two years ago, researchers at Boeing-Spectrolab managed to achieve 40.7% solar cell efficiency. Two years later, scientists at the US Department of Energy's National Renewable Energy Laboratory have demonstrated their nerve by trumpeting an all new world record... one that's 0.1% points better than the last. Yes, your new record now sits at 40.8% -- tremendous progress, wouldn't you say? Looking outside of the numbers, you'll find that these cells differ "significantly" from the prior record holders, which enable them to be thinner, lighter, cheaper and altogether swanker. That's it for now folks -- come back in a couple years, we hear 40.9% is just around the bend.[Via CNET]
Japanese consortium disguises solar cells as leaves
We've already seen a number of attempts to more seamlessly integrate solar cells into everyday environments, but none have quite gone as far as this latest prototype from the folks at Japan's National Institute of Advanced Industrial Science and Technology, Mitsubishi, and Tokki Corp. As you can see above, they've come up with a solution that shouldn't look too out of place nestled in with some actual foliage, with a special protective film encapsulating each of the solar models to ensure they stand up to the outdoors. The institute (no stranger to unique concepts) apparently isn't stopping there, however, saying that it also has plans to expand its use of organic thin-film solar cells into other areas where design is important, including walls, windows, clothing, and livingware, to name but a few.
Researchers tout spreadable, self-powered OLEDs
It looks like we could one day be buying our OLED displays by the jar or the bucket-full, at least if some researchers from Sumitomo Chemical and Mitsubishi Chemical have their way. They're now working on what they describe as "spreadable" OLEDs, which could either be spread or "painted" on virtually any surface, leaving an OLED screen that would be just 100nm thick. As if that wasn't enough, the spreadable concoction would also double as a solar panel that'd keep the OLEDs powered, something that's apparently possible due to the "similar, but opposite, principles" that OLEDs and solar cells work on. What's more, while the two companies are apparently still in the early stages of research, they say they're aiming to have usable prototypes ready within the next two years. [Via OLED Info]
Massachusetts company develops inkjet-printed solar panels
Printed solar cell tech keeps getting closer and closer to reality, with a Massachusetts company called Konarka Technologies today announcing that it's now able to manufacture solar cells using inkjet printing. There's not a ton of information available about the process, but Konarka's already demonstrated it and published details in a trade journal called Advanced Materials -- which sounds like scintillating reading, if you ask us. Konarka says the process makes fabbing solar panels extremely easy, since it doesn't require a clean room, and the resulting cost reductions could lead to an increased number of applications for solar power. Of course, the economics of inkjet printing have lured more than one company to the dark side -- we wonder if Konarka is eventually going to start selling solar ink cartridges for more than the printers themselves?[Via The Raw Feed]
New solar cell cuts out the middle man, harvests hydrogen from water
Some Penn State researchers are taking a cue from nature and have built the first solar cell that can effectively split water to harvest the hydrogen. While the technology and efficiency of electricity-gathering solar cells has been humming on nicely, cells that can pull hydrogen out of water directly (instead of using solar-harvested electricity to do it) have found that the catalysts conducive to separating hydrogen and oxygen are usually pretty good at putting the two gases right back together again. The folks at Penn State have now developed a process that more closely mimics the photosynthesis process in plants, and while we won't pretend to understand all the nitty gritty of dye usage and other such nonsense, we do know that such a system could eventually attain 15% or so efficiency, providing a nice and clean way to gather power for that fuel cell car of the future.[Image courtesy of MTU.edu]
Researchers create printed solar cells
We've seen a lot of attempts to cut the costs of solar cells, but a team in Japan has managed to create an inexpensive flexible cell that's as thin as a sheet of paper using what they describe as traditional printing techniques. The team, composed of researchers from Toin University in Yokohama and private firm Fujimori Kogyo, managed to eliminate the expensive silicon component of regular solar cells, reducing thickness to just .4mm (.015 inches), and allowing a factory to pump out reams of the material every month -- enough to generate 10 megawatts of juice. That's actually a fairly low estimate, as the cells are only at 6% efficiency right now, but we can imagine that number shooting upwards after they start shipping in February.
Pink solar cells provide green power on the cheap
The race to build a cheaper solar cell continues to produce results, as researchers at Ohio State have developed a nanotech solar cell with a unique pink color that they say will one day be able to produce as much power as traditional silicon cells for a quarter of the cost. The dye-sensitive solar cells, or DSSCs, get their pink color from a mixture of ruthenium and either titanium or zinc oxide particles that absorb sunlight, while nanowires link the particles to provide power transfer. So far the team have gotten the cells to produce half as much power as traditional cells, but the next step is to start using nanowire "trees" to improve efficiency to equal or surpass those levels. No word on when we'll see this tech hit the market, but surely the prospect of a hot pink solar Cadillac isn't too far off.[Photo is of an unrelated DSSC concept from New Zealand]
Researchers develop "paint-on" solar cells
The quest to builder a better, cheaper solar cell continues on, as researchers at the New Jersey Institute of Technology have developed a new type of solar cell that can be printed or painted onto flexible plastic sheets. Unlike traditional silicon cells, the print-on cells are composed of carbon nanotubes and buckyballs, which results in substantially cheaper manufacturing costs and greater efficiency, since apparently carbon nanotubes are terrific conductors. The scientists seem pretty pumped about the potential for their tech, with lead researcher Somenath Mitra quite confidently proclaiming that we'll all soon be printing "sheets of these solar cells with inexpensive home-based inkjet printers." Yeah, we're sure there won't be any shenanigans going on in that ink cartridge market.[Via Inhabitat]
Korean researchers develop uber-cheap solar cells
We'll go ahead and hand it to Spectrolab for crafting such an immensely efficient solar cell without regard to cost, but a team of Korean researchers have reportedly conjured up a rendition of their own that, you know, would actually be feasible to commercialize in the not too distant future. The team -- led by Lee Kwang-hee of the Gwangju Institute of Science and Technology -- has reportedly created a diminutive plastic solar cell that touts "6.5-percent efficiency," and while that number pales in comparison to other alternatives, it's the pricetag that's of interest here. Apparently, existing solar cells that use silicon semiconductors cost around "$2.30 to generate one watt of electricity," whereas this group's solution costs just ten cents per watt. Better yet, plans are already in motion to increase efficiency up to 15-percent, after which we could see these things hitting the marketplace at large "by 2012."
Spectrolab designs highly efficient solar cell
While we certainly applaud the designers at Spectrolab for developing a solar cell that's reportedly "twice as efficient as typical rooftop solar panels," we're stifling most of our excitement until it actually leaves the laboratory. Nevertheless, the Boeing subsidiary has apparently cranked out a cell that utilizes metamorphic materials and is "designed for photovoltaic systems that use lenses and mirrors to concentrate the sun's rays onto small, high-efficiency solar cells." The unique semiconductors used are said to resemble ones that adorn satellites and planetary landers, and can capture three layers of the solar spectrum versus the single layer that traditional solar panels collect. Unfortunately, it seems that the eventual goals for this thing are rather ho hum, as the crew only expects the cells to hit 45-percent efficiency within the next six or so years. C'mon folks, you've already got alternatives at 40.