SolarCells
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Apple reportedly considering solar-powered devices
Apple and arch-rival/partner Samsung are both looking at creating consumer electronic devices powered by the sun, but don't expect to see them in the marketplace anytime soon. According to a post on Asian technology website Digitimes, Taiwan-based solar firms are being considered as part of the supply chain for solar-powered devices from Apple, but these companies think that for the foreseeable future they'd be niche products. To get costs down, devices would need a standard-sized solar cell that could be mass-produced and extremely light. A number of solar cell manufacturers are looking at organic photovoltaic cells, which have a fairly low conversion efficiency, light weight, and low production cost. Only about 5 to 8 percent of the light energy falling on these cells is converted to power, meaning that the solar cells either have to get more efficient or be sized larger. The latter option is contrary to contemporary electronics design, and it's unlikely that consumers would want to move to larger devices. One technology that's being considered is the solar cell on paper invented at the Massachusetts Institute of Technology (MIT). These organic photovoltaic cells are extremely light, but at present a polyethylene terephthalate (PET) substrate is being used by most manufacturers due to poor yields for the paper cells. Still, it's good to see that our favorite manufacturer is looking into solar-powered devices. I look forward to the day when I can charge up a MacBook Air simply by working outside or under a bright light.
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.
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.
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%
Purdue researchers make solar cell manufacturing cheaper, more efficient with lasers
Is there anything lasers can't do? We only ask because they seem to be improving everything from microphones to railroads, and now researchers from Purdue University have leveraged the power of light to better manufacture solar cells. Using an ultrashort (as in quadrillionths of a second) pulse laser to more precisely scribe the microchannels connecting thin-film solar cells -- as compared to current mechanical stylus methods -- the Boilermakers were able to improve energy transfer efficiency between cells and significantly reduce manufacturing time. Having demonstrated the process works, research continues to better understand and prepare it for use by manufacturers -- sooner rather than later, we hope.
Researchers debut one-cubic-millimeter computer, want to stick it in your eye
This as-of-yet-unnamed mini computer was fashioned as an implantable eye pressure monitor for glaucoma patients, but its creators envision a future where we're all crawling with the little buggers. Taking up just over one cubic millimeter of space, the thing stuffs a pressure sensor, memory, thin-film battery, solar cell, wireless radio, and low-power microprocessor all into one very small translucent container. The processor behind this little guy uses an "extreme" sleep mode to keep it napping at 15-minute intervals and sucking up 5.3 nanowatts while awake, and its battery runs off 10 hours of indoor light or one and a half hours of sun beams. Using the sensor to measure eye pressure and the radio to communicate with an external reader, the system will continuously track the progress of glaucoma, without those pesky contacts. Of course, the mad scientists behind it look forward to a day when the tiny device will do much more, with each of us toting hundreds of the computer implants all over our bodies -- looks like a bright future for cyborgdom.
Solar Wind bridge concept could power 15,000 homes, grow vegetables
Why just use solar power or wind power when you can use both? Designed by Francesco Colarossi, Giovanna Saracino and Luisa Saracino as part of an Italian design contest to re-imagine a decommissioned bridge (for which it placed second), this so-called Solar Wind concept would have solar cells embedded in the roadway (an idea that's already catching on) and an array of 26 wind turbines underneath, which the designers say could produce enough energy combined to power 15,000 homes. To make the design greener still, the designers have even included a "green promenade" that would run alongside the road, which they suggest could be used to grow fruits and vegetables that'd then be sold to folks driving by. Incidentally, while it's less focused on technology, the design that placed first in the contest (a so-called "vertical village") is pretty impressive in its own right -- check it out after the break.
Apple wins patent for solar-powered portable device
We recently covered how Apple was awarded 563 patents in 2010, but a patent approval announced today is for something we first mentioned back in January of 2010 -- a patent for power management circuitry for solar-powered portable devices. Patently Apple is reporting that the US Patent and Trademark Office published the newly approved patent, which pertains to charging and operating portable devices with solar power via a voltage converter. While most solar chargers designed for portable devices only act as a way to charge the internal battery, this patent is for a way for said power to operate the device as well. By using the converter/booster, energy gleaned from the solar panels could be monitored and configured to both charge and operate a portable device even when not in full direct sun. Could this be a precursor to an iPhone covered in solar cells? There sure has been a lot of patent talk around here lately, especially when it comes to multi-touch patents, but that just shows that Apple is really stretching its legs and going after innovation instead of resting on its laurels. Can't wait to see what new developments 2011 brings us.
Boeing's Spectrolab subsidiary set to mass produce 39.2 percent efficient solar cells
Boeing's Spectrolab subsidiary has been working on making solar cells more and more efficient for years now, and it looks like it's now set to put its latest record-breaking cells into mass production. Those come in the form of the company's new C3MJ+ solar cells, which boast an average conversion efficiency of 39.2 percent, making them the most efficient mass produced cells to date. What's more, Spectrolab says that since the new cells are so similar to its current C3MJ production cells, it should be relatively easy for customers already using those to upgrade to the new cells. Still no word on a price, it seems, but the new cells should be available in January. And, yes, Spectrolab is also hard at work on breaking its own record -- it hopes to crack the 40 percent mark later in 2011.
Photon enhanced thermionic emission could double efficiency of solar cells
Engineers at Stanford have developed a process which can harness the light and heat of the sun simultaneously, which could lead to solar cells that are twice as efficient as those currently available. Called photon enhanced thermionic emission -- or PETE for short -- the process differs from traditional cells which lose efficiency as temperatures rise, and the materials needed to build the cells are cheap and widely available. The engineers got around the lower efficiencies by coating a piece of semiconducting material with a thin layer of the metal cesium, which enables the material to use both heat and light simultaneously. While the materials as currently demonstrated work best in very high temperatures, the researchers indicate that in the near future, the materials could have wide enough application to make them competitive with traditional forms of energy. Hit the source for the full story.
Melting silicon 'in reverse' can help purify it, result in cheaper electronics
Just our favorite combination of news: a mind-bending innovation that can have a very practical impact on our daily tech consumption. MIT scientists have found that silicon -- when combined in the right dosage with other metals -- can actually be made to melt by reducing its temperature. Typically, you'd require 1,414 degrees of Celsius heat to liquidize solid silicon, but the intermixed variant discussed here need only reach 900 degrees before its slow cooling process starts turning it gooey. The great advantage to this discovery is that because the impurities tend to separate off into the liquid part, there's now a practicable way to filter them out, meaning that things like solar cells won't require the same high grade of silicon purity for their construction -- which in turn might lead to us being able to afford them one day. Of course, that's getting way too far ahead of ourselves, as the research is still ongoing, but good news is good news no matter the timescale.
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.
Apple patent application hints at solar-powered iPhone
Solar-powered Apple patents are nothing new, but we'd always thought Steve intended to blanket his devices with the technology. Cupertino's latest patent application shows different -- the photocells are inside. "By integrating both the touch sensors and the solar cell layers into the same stack-up, surface area on the portable device may be conserved," reads the filing. Nerd to English translation: the next iDevice you hold might have energy-giving solar panels built right into that spacious, responsive multitouch screen.
Inhabitat's Week in Green: salad spinners, diapers, and solutions to the Deepwater catastrophe
The Week in Green is a new item from our friends at Inhabitat, recapping the week's most interesting green developments and clean tech news for us. This week renewable energy received a giant jolt forward as Google unveiled plans to invest $40 million in North Dakota wind farms. Solar power is also having a moment in the sun as MIT unveiled the world's first solar cells printed on paper - we can't wait to see a post-it version that we can stick to our walls! Meanwhile a team of Swiss researchers are harnessing rays of light for an entirely different purpose -- they've figured out a way to create rain clouds by shooting laser beams into the sky. With the Deepwater Horizon oil spill still saturating the sea weeks after the leak sprung, we also looked at an array of innovative solutions for cleaning up the catastrophe. The first step to stemming the spill's damage is predicting its spread, which is why scientists are harnessing advanced virtual reality models to aid in cleanup efforts. We also took a look at the BP's first massive oil containment dome, which the company plans to lower 5,000 feet below the sea to plug up the leak. This week we also looked at several ingenious inventions that find incredible new uses for everyday items. Two students at Rice University have transformed a simple salad spinner into a centrifuge that can save lives by diagnosing diseases, and a Japanese company called Super Faith has invented a machine that can transform used adult diapers into an energy source. Finally, we were dazzled by two high-tech garments that harness LEDs to light up the night. Katy Perry recently took to the red carpet wearing a shimmering gown studded with thousands of blinking rainbow lights, and we were impressed by this LED-laden coat that keeps bicyclists safe when they hit the streets at night.
Inhabitat's Week in Green: hypermiling, electric FedEx, and frog foam
The Week in Green is a new item from our friends at Inhabitat, recapping the week's most interesting green developments and clean tech news for us. This week Inhabitat explored the high-tech side of green building, showcasing Shigeru Ban's new design for the Pomidou-Metz art museum, and announcing the near-completion of the greenest skyscraper in the world. We also explored green building strategies ranging from super efficient LED lamps. We also saw several signs that the next generation of efficient vehicles is right around the corner - this week Chevrolet rolled out its first production Volt while Nissan announced the final pricing of its Leaf EV - a remarkably affordable $25,280. Even the hard working vehicles at FedEx are getting some much-needed relief as the company rolls out its first round of electric delivery vans. And if you're concerned about green vehicles going the distance, look no further than this student-built supercar that's able to get 2,487 MPG. This week biotech also blew our minds as researchers unveiled plant-based molecules that could create more efficient solar cells and a new type of photovoltaic frog foam that's capable of capturing carbon. Finally, sticks and stones may break bones, but scientists have figured out a way to grow new ones -- using liposuctioned human fat.
Subretinal implant successfully tested on humans, makes blind narrowly see
How many scientists does it take to properly install a lightbulb? When that lightbulb is an implant that stimulates retinal photoreceptors to restore one's sight, quite a few -- even if they disagree whether said implant should be placed on top of the retina (requiring glasses to supply power and video feed) or underneath, using photocells to channel natural sunlight. Now, a German firm dubbed Retina Implant has scored a big win for the subretinal solution with a three-millimeter, 1,500 pixel microchip that gives patients a 12 degree field of view. Conducting human trials with 11 patients suffering from retinitis pigmentosa, the company successfully performed operations on seven, with one even managing to distinguish between similar objects (knife, fork, spoon) and perform very basic reading. Though usual disclaimers apply -- the tech is still a long way off, it only works on folks who've slowly lost their vision, etc. -- this seems like a step in the right direction, and at least one man now knows which direction that is.
Casio's solar-powered Pathfinder watch plays the green card twice
Plotting their latest spread of watches this spring, Casio executives decided it was time to "go green." Some poor schmuck in R&D took them at their word. Thankfully for mother nature, the Casio Pathfinder PRG110C-3 is more than meets the eye; the watch -- suited for argonauts needing an altimeter, barometer, thermometer and digital compass -- also has a miniature solar cell built into its face to automatically recharge the battery. Though Casio's claim that this last will cut down on the three billion batteries Americans trash each year seems a little reaching -- watch batteries last a lot longer than a AA -- the timepiece does help the planet some merely by being packaged in recyclables. The $250 device will be available exclusively from Amazon, and yeah, the color you see here is the color you'll get.
Caltech gurus whip up highly efficient, low cost flexible solar cell
Solar cells are cute and all, but let's be real -- these things are far too inefficient for mainstream use. Scientists at the California Institute of Technology are working hard to remedy that very issue, and they've recently concocted a "new type of flexible solar cell that enhances the absorption of sunlight and efficiently converts its photons into electrons." The solution relies on arrays of long, thin silicon wires embedded onto a polymer substrate, which uses just a fraction of the expensive semiconductor materials required by conventional solar cells. According to professor Harry Atwater, these cells have "surpassed the conventional light-trapping limit for absorbing materials" for the first time, and we're told that the arrays can convert between 90 and 100 percent of the photons they absorb into electrons, and yes, that does mean that they have a near-perfect internal quantum efficiency. Hit the source link for all the technobabble, and cross your fingers for this stuff to get the honored approval of the Governator.
Inhabitat's Week in Green: Illumicharger, thin solar cells, and a Porsche
The Week in Green is a new item from our friends at Inhabitat, recapping the week's most interesting green developments and clean tech news for us. This week Inhabitat geared up for the Greener Gadgets Conference by showcasing some of the most exciting gizmos from this year's design competition. First we took a look at the IllumiCharger, a handy wall-mounted solar charger that one-ups your standard outlets with two usb ports. We also liked the Fair Energy Clock, a fool-proof adapter that vanquishes vampire power by staking out times to pull the plug. And in case you missed it, be sure to check out Corky, the kinetic mouse that generates energy with every click. Batteries be gone! It was also another big week for solar power as technological advances produced photovoltaic cells that are smaller, more efficient, and more versatile in their applications. IBM unveiled a new breed of thin-film cells that are 40% more efficient than previous prototypes, while the University of Michigan announced the world's smallest solar-powered sensor, which measure a scant 9 cubic millimeters. Finally, we were flat-out wowed by Porsche's latest supercar - a 911 hybrid that will be taking on the competition at the 24 hour Nürburgring race this May. The vehicle is based on the tried-and-true 911 platform but features some race-ready tricks under the hood: front wheel hybrid drive and a kinetic energy recovery system that stores braking energy in a flywheel that delivers a 160hp boost of speed with the press of a button.
