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Solid state solar panels are more affordable, say researchers, don't leak
Researchers at Northwestern University have found one way to stop a leak: get rid of the liquid. A new variation on the Grätzel solar cell replaces a short-lived organic dye with a solid alternative. The molecular dye the solid substance replaces was corrosive, at risk of leaking and only lasted about 18-months -- by replacing it, researchers plan to pave the way for a more affordable (and less toxic) alternative. Northwestern's new design flaunts a 10.2-percent conversion efficiency, the highest ever recorded in a solid-state solar cell of its type -- but that's still only half of what traditional sun collectors can do. Researchers hope to improve conversion in the long run, but expect that the cost reduction alone will be enough to get the party going. It may not be the greenest solar technology we've ever seen, but who are we to judge?
Researchers create incredibly thin solar cells flexible enough to wrap around a human hair
You've probably heard that the sun is strong enough to power our planet many times over, but without a practical method of harnessing that energy, there's no way to take full advantage. An incredibly thin and light solar cell could go a long way to accomplishing that on a smaller scale, however, making the latest device from researchers from the University of Austria and the University of Tokyo a fairly significant discovery. Scientists were able to create an ultra-thin solar cell that measures just 1.9 micrometers thick -- roughly one-tenth the size of the next device. Not only is the sample slim -- composed of electrodes mounted on plastic foil, rather than glass -- it's also incredibly flexible, able to be wrapped around a single strand of human hair (which, believe it or not, is nearly 20 times thicker). The scalable cell could replace batteries in lighting, display and medical applications, and may be ready to be put to use in as few as five years. There's a bounty of physical measurement and efficiency data at the source link below, so grab those reading glasses and click on past the break.
Arman Ahnood teases OLED display with solar cells, idealizes the self-sustaining smartphone
Plenty of effort is going into improving smartphone battery life, but only a few individuals are delving into radical realms to achieve the goal. Take for example, Arman Ahnood, a researcher at the London Centre for Nanotechnology, whose latest prototype uses solar cells to capture wasted energy from OLEDs. Similar to Wysips (which uses only ambient light), and equipment from UCLA (designed for LCDs), each project faces the unenviable task of making the smartphone a self-sustaining piece of gear.Ahnood's handiwork relies on an array of solar cells that surround and sit beneath the phone's display. Currently, the system averages 11 percent efficiency in its energy capture, with a peak efficiency of 18 percent. Naturally, there are gains to be made. Of the light generated from OLEDs, Ahnood approximates that only 36 percent is actually projected outward. Critically speaking, this also suggests that similar power savings could be achieved with dimmer, more efficient displays, but we'll let that slide. As it stands, Ahnood's system is able to generate approximately five milliwatts of additional power, given a screen size of 3.7-inches. It's hardly sustainable, but if the creation lets us squeeze in a few more text messages on Friday night, we'll take it.
Scientists create first solar cell with over 100 percent quantum efficiency
Researchers over at the National Renewable Energy Lab have reportedly made the first solar cell with an external quantum efficiency over 100 percent. Quantum efficiency relates to the number of electrons-per-second flowing in a solar cell circuit, divided by the number of photons from the energy entering. The NREL team recorded an efficiency topping out at 114 percent, by creating the first working multiple exciton generation (MEG) cell. Using MEG, a single high energy photon can produce more than one electron-hole pair per absorbed photon. The extra efficiency comes from quantum dots 'harvesting' energy that would otherwise be lost as heat. The cell itself uses anti-reflection coating on a transparent conductor, layered with zinc oxide, lead selenide, and gold. NREL scientist Arthur J. Nozik predicted as far back as 2001 that MEG would do the job, but it's taken until now for the concept to leap over from theory. The hope is, of course, that this will lead to more competitively priced solar power, fueling the transport of the future.
Apple solar patent wants a sunny display light for your Sunny (De)light
Let's begin with the usual disclaimer: Apple patent applications do not mean the outlandish technology will be arriving in the next iPhone, just that someone in a Cupertino basement cooked it up during a marathon "imagining" session (possibly while enjoying a cool glass of purple stuff). The company's latest drawings-and-charts masterpiece concerns the construction and placement of photovoltaic cells and, more importantly, using the sun's energy to illuminate a display. By using a mirror pointed at the sky, you could reflect some rays toward your screen to supplement an LED backlight, or by turning the top lid of your Macbook into a solar panel. Although we can see one minor drawback in using solar powered backlighting -- if you have to point your display toward the sun, you're gonna need some powerful shades.
Intel reveals 'Claremont' Near Threshold Voltage Processor, other conceptual awesomeness at IDF (video)
Thought Intel was done busting out new slabs of The Future at IDF? Wrong. Justin Rattner, the firm's chief technology officer, just took the stage here in San Francisco in order to showcase a trifecta of new concepts, all of which were borne out of research in Intel Labs. The first, and perhaps most notable, is the Near Threshold Voltage Processor (code-named "Claremont"), which relies on novel, ultra-low voltage circuits that dramatically reduce energy consumption -- like EnerJ, but not. How so? Well, by "operating close to threshold, or turn-on voltage, of the transistors," it's able to scream when needed or scale back dramatically (below ten milliwatts) when the workload is light. If you're curious as to just how low that is, we're told that it's low enough to keep running while powered only by a solar cell the size of a postage stamp. Sadly, the research chip isn't destined to become a product itself, but Intel's hoping that the knowledge gained could lead to "integration of scalable near-threshold voltage circuits across a wide range of future products, reducing power consumption by five-fold or more and extending always-on capability to a wider range of computing devices." As for demos? A smattering of multicore / multiprocessor sessions aided Intel in upping its bragging rights, and we were informed that coding for multicore setups is "easier than the press makes out to be." The outfit also took the opportunity to release a Parallel JS engine to the open source crowd, adding data-parallel capabilities to JavaScript to purportedly "speed up browser-based services such as computer vision, cryptography, and 3D games by up to eight-fold." Furthermore, a newly revealed Hybrid Memory Cube -- complete with seven times better energy efficiency than today's DDR3 memory -- was also unwrapped. More details can be found in the links below, and we've got your unveiling video embedded just beyond the break. %Gallery-133942%
Ford teams with SunPower, offers EV owners $10,000 solar charging system
We might not know how much Ford's expecting for the Focus Electric, but it's already put a hefty $10,000 price tag on one of its accessories. The company announced today that it has teamed with SunPower to offer purchasers of the upcoming Focus Electric and C-MAX Energi a 2.5-kilowatt rooftop solar system. That setup will apparently provide "enough renewable energy production to offset the energy used for charging" cars that log 1,000 miles per month (about 30 miles per day) or less. If $10,000 is just a little too rich for your blood, there's always Best Buy's $1,500 budget-friendly charging station. Full PR after the break.
MIT researchers revolutionize solar cell printing, fold the power of the sun into your everyday home (video)
Wouldn't it be neat if you could power a few gadgets around the house with some tastefully chosen, solar cell-embedded curtains? Alright, so this MIT-pioneered tech's not quite that advanced yet, but it's destined to have a Martha Stewart Living future. By eschewing liquids and high temperatures for gentler vapors kept below 120 degrees Celsius, researchers were able to cheaply print an array of photovoltaic cells on "ordinary untreated paper, cloth or plastic." And here's some additional food for thought -- the vapor-deposition process used to create these cells is the same as the one that puts that "silvery lining in your bag of potato chips" -- science, it's everywhere. Despite the tech's home furnishing friendly approach, this breakthrough printing technique can't be done with your everyday inkjet, but it will make the cost of solar energy installations a bit cozier. Its flexible durability aside, the cells currently operate at only one percent efficiency -- so you might want to buy those drapes in bulk to see a real bottom line kickback. Foldable paper video demonstration after the break.
Oregon engineers roll out cheaper, less wasteful solar cells with inkjet printer
It looks like the push to turn the inkjet printer into the next great manufacturer of solar cells has found another proponent in a team of engineers at Oregon State University. That group of resourceful researchers claims to have created the world's first "CIGS solar devices with inkjet printing," thus giving birth to a new production process that reduces raw material waste by 90 percent. CIGS (an acronym for copper, indium, gallium, and selenium) is a highly absorbent and efficient compound, especially suited to creating thin-film solar cells. The team has used inkjet technology to pump out a CIGS ink with an efficiency of five percent, and a potential efficiency of 12 percent; apparently enough to produce a "commercially viable solar cell." Unfortunately, the group has yet to announce plans to bring the ink to our desktop printer -- so much for that backyard solar farm. Full PR after the break.
Mizzou Professor says nantenna solar sheet soaks up 90 percent of the sun's rays, puts sunscreen to shame
Photovoltaics suffer from gross inefficiency, despite incremental improvements in their power producing capabilities. According to research by a team led by a University of Missouri professor, however, newly developed nantenna-equipped solar sheets can reap more than 90 percent of the sun's bounty -- which is more than double the efficiency of existing solar technologies. Apparently, some "special high-speed electrical circuitry" is the secret sauce behind the solar breakthrough. Of course, the flexible film is currently a flight of fancy and won't be generating juice for the public anytime soon. The professor and his pals still need capital for commercialization, but they believe a product will be ready within five years. Take your time, guys, it's not like global warming's getting worse. [Image source: Idaho National Laboratory (PDF)]
Nanocones make solar cells more efficient, sinister looking
Going green is de rigeur, so the sun is becoming a much-preferred source of power. However, solar cells' inefficient harvesting of heliacal energies is a major reason they haven't usurped the power of petroleum. Good thing the big brains at Oak Ridge National Laboratory are looking to change that with nanocone-based solar technology. The teeny-tiny cones are made of zinc oxide and create "an intrinsic electric field distribution" to improve electrical charge transport within solar cells. We aren't sure what that means, but we do know the prickly-looking design provides a 3.2 percent light-to-power conversion efficiency that's a substantial improvement over the meager 1.8 percent offered by today's flat photovoltaics made of similar materials. That's 80 percent more efficient, and 100 percent more awesome.
Newly discovered properties of light promise better solar batteries, really great tans
Are you tired of waking up to the same old semiconductor-based solar array? Do you yearn for a change? We know you do and, thanks again to the wonder and mystery of magnetic fields (they're not just for stopping speech anymore), there's a new day dawning. University of Michigan scientists were shooting lasers at glass, as they do, and made a remarkable discovery: light passing through a non-conductive surface like glass generates impressive magnetic effects – up to 100 million times greater than expected. The resulting magnetic force could replace the electric effect exploited by current technology, paving the way for "optical batteries." Though different from the Wysips transparent photovoltaic cell, the technology could have similar applications and may render obsolete those massive solar farms. No need to worry, though -- your stylish solar backpack is as fly as it ever was.
Ralph Lauren's solar-panel backpack charges your phone in hours, your credit card in seconds
We here at Engadget are in favor of hitting the books from time to time, but we can't have lame gadget-less backpacks hurting our true techie rep. That's why we're excited to see Ralph Lauren outing its first solar-equipped knapsack as part of its RLX sports line. Four solar cells around back harness the sun's power to generate 3.45 watts -- completely juicing up an iPhone in a purported two-to-three hours, assuming you've got "proper sunlight orientation," of course. Like the optional orange hue (it also comes in black), the sun-sucking cells aren't particularly low profile -- but for $800 don't you want something, uh, recognizable? Still, if you simply must be that guy be sure to hit the source link and don't look back, but for everyone else, might we recommend a portable USB charger for a little less coin?
Apple patent application reveals plans for external battery pack, spells further trouble for HyperMac
Way back in September of last year, Apple filed a patent-infringement suit against HyperMac, the folks behind these external batteries. At the time, it looked like Apple was protecting its patented MagSafe power connector, but a newly released USPTO application for a "Power Adapter with Internal Battery" might reveal a more accurate view of the company's litigious motivations. From the look of things, the outfit intends to make its mark on juicing solutions with what is basically a wall charger packing an internal battery. According to the patent filing, the contraption would include a processor for parceling energy to the host device as well as the adapter, and could also incorporate a supplemental energy source like a solar cell. Among other things, it would also communicate with the device being charged to allow users to monitor the juice stored in the extra battery. If the thing does end up making it to market, it looks like HyperMac could have a whole lot more trouble on its hands than a little patent-infringement suit.
Energy-efficient military uniforms to make solar-powered necktie so last season
This definitely isn't the first time we've heard of wearable solar cells, but a new development underway in the UK could certainly have a greater impact than, say, an iPod-charging denim jacket. By combining photovoltaic cells with thermoelectric devices, a team of researchers is working to create new, more efficient uniforms for British troops. The solar-powered outfits could cut the weight of traditional battery packs in half, allow for significantly longer military missions, and actually absorb energy across the electromagnetic spectrum, decreasing the possibility of detection by infrared technology. To ensure 24-hour power, the solar cells will collect energy in daylight, with thermoelectric devices taking on the task at night. A prototype is set for 2013, but we wonder how long it will take to hit the catwalk.
Wysips wants to turn your phone's display into a solar cell (hands-on with video)
We chatted with a fascinating French startup by the name of Wysips here at CTIA today that's showing off transparent photovoltaic film -- in other words, it generates power from light... and you can see right through it. It's the only such film in the world, apparently -- and though you can probably imagine a host of possible applications for something like that, turning the entire surface of a touchscreen smartphone into a self-sufficient, solar-powered beast is clearly high on the list. Read all about it after the break! %Gallery-119600%
Seiko's 'active matrix' E Ink watch will be on sale by end of 2010
It's always good to see a concept, particularly one as appealing as Seiko's "active matrix" E Ink watch, make it to retail product. The company's had a thing for E Ink timepieces for a while now, but what sets this new one apart is the supposed 180-degree viewing angle it affords -- and, of course, those retro good looks do it no harm either. Then there's also the radio-controlled movement, which receives its time from the nearest atomic clock, and the solar cells framing that electrophoretic display. All very nice and neat, but the best news is that it might (might!) be priced within reach of regular Joes and Vlads like us. We'll know soon enough, a retail release is expected by the end of the year.
Self-repairing solar cells could also fix our energy dependency
It doesn't take much for a photovoltaic cell to not work quite as well as it used to. Sure, a big hail storm or the like will do a number on your megabucks rooftop installation, but the sun itself, the very thing those cells are designed to capture, gradually damages their internals, reducing efficiency. The fix, according to a team at MIT, is self-assembling (and therefore self-repairing) solar cells made up of a synthetic molecular soup containing phospholipids that, when mixed with a solution, attach themselves to a series of carbon nanotubes for alignment. Other molecules that react with light then attach to the phospholipids and, with a little illumination, start firing out electrons like mad. After a few hours of solar pummeling the whole thing can be broken down and automatically re-created, returning efficiency to maximum. Overall efficiency of the system is extremely low currently, thanks to a low concentration of those photon-catching structures, but individually they capture about 40 percent of the light's energy, meaning a higher concentration could make for very hearty soup indeed.
Hama Zero's Solar Bike Fujin runs thanks to the sun, not on it (video)
Upon hearing the name "Solar Bike Fujin," designed by a Japanese space rover engineer, we leaned back in our chairs and dreamed up dramatic images of a futuristic bicycle dashing across the void before cruising the turbulent surface of the sun. However, when we watched the rest of the video below we realized that the bike will instead conquer rather more terrestrial routes at speeds well short of escape velocity (72km/h, or about 45mph). It is, however, powered by the sun, able to run 220km on a full charge or, thanks to its aerodynamicaly profiled solar wings, can give itself 50km worth of juice just by sitting in the sun while you put in your 9-to-5. This is helped by incredibly low rolling-resistance wheels, the front one able to keep rotating for 20 minutes on its own with just a gentle spin, technology borrowed from creator Mr. Yamawaki's Minerva rover that was part of the Hayabusa probe. Hopefully this bike manages to get a little further than that rover did.
Michael Grätzel, inventor of the dye-sensitized solar cell, wins 2010 Millennium Technology Prize (video)
In 1991, a pair of scientists published a paper in Nature, detailing a intriguing new discovery: the dye-sensitized solar cell. Today, one of them won €800,000 for his efforts, and the 2010 Millennium Technology Prize. Michael Grätzel accepted the award for the low-cost solar cells that often bear his name, and which make possible the sunglasses, windows and iPhone patents we seem to spot every few days. Hear the good professor speak about his invention in a video after the break.
