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Researchers make unsuitable parts work as solar cells, could lead to cheaper panels
Harnessing the power of the sun is a tricky business, but even the past few weeks have seen some interesting developments in the field. In this latest installment, researchers from the Lawrence Berkeley National Laboratory and the University of California have figured out a way of making solar cells from any semiconductor, potentially reducing the cost of their production. You see, efficient solar cells require semiconductors to be chemically modified for the current they produce to flow in one direction. The process uses expensive materials and only works with a few types of semiconductors, but the team's looking at using ones which aren't normally suitable -- the magic is to apply an electrical field to them. This field requires energy, but what's consumed is said to be a tiny fraction of what the cell's capable of producing when active, and it means chemical modification isn't needed. The concept of using a field to standardize the flow of juice isn't a new one, but the team's work on the geometrical structure of the cells has made it a reality, with a couple of working prototypes to satisfy the skeptics. More of these are on the way, as their focus has shifted to which semiconductors can offer the best efficiency at the lowest cost. And when the researchers have answered that question, there's nothing left to do but get cracking on commercial production. For the full scientific explanation, hit up the links below.
3D, light-trapping solar cells successfully fabricated by Solar3D
Solar3D probably isn't a company you're particularly familiar with... at least not yet. The California-based manufacturer has just successfully fabricated a three dimensional solar panel that traps sun light in nano-scale wells on a silicon wafer. Perhaps most exciting, the prototype panel was built using off-the-shelf tech from Panasonic, meaning that the price of mass production shouldn't be prohibitively high. More testing is needed, but the resulting panels should be up to 50 percent more efficient than current generation 2D ones. For a few more details, check out The PR after the break.
Alt-week 7.8.2012: Solar flares, trapping dark matter, and life-sized Lego trees
Alt-week peels back the covers on some of the more curious sci-tech stories from the last seven days. This week we swing by some superhero news, look at how solar panels might shape up in the future, explore a Lego forest and see how to grab dark matter just using some household gold and strands of DNA. Not only that, we discover how the sun likes to celebrate the fourth of July with its own firework display. This is alt-week
Logitech unveils its Solar Keyboard Folio for the new iPad and iPad 2, we go hands-on
There are all sorts of ways to go green these days, from driving an EV to installing super efficient light bulbs, and now Logitech's given us an environmentally friendly way to type tactilely on a tablet. It's a new iPad and iPad 2-friendly case called the Solar Keyboard Folio, which packs a Bluetooth keyboard powered by ambient light using the same solar cell tech found on the firm's computer keyboards. Once topped up with photons, Logitech claims its battery will keep you typing for over 1,000 hours even in complete darkness. The case is crafted of black, soft-touch, faux leather embossed with a small Logitech logo and has perforations for the iPad's speakers, plus a portal for the tablet's camera. Its keyboard is made of gray plastic, and pecking at the grid is a similar experience to using the one found on Logitech's other recently released iPad typing peripheral, the Ultrathin Keyboard Cover. Buttons are short-throw and provide satisfying clicky feedback, but the space bar and shift keys have a hollow feel when pressed. Perhaps the Folio's most intriguing design feature is the feet on the corners of the cradle in which the iPad is placed. Those little nubs allow for two viewing angles -- your slate can be seated in a more upright position behind the keyboard for typing, or in the notches outside the two shift keys for a more obtuse viewing angle when the keyboard isn't needed. What's this bit of green gear cost? It goes on sale in the US and Europe this month with an MSRP of $130.
Tesla pairs up with SolarCity, will power off-grid homes as well as cars
If you've ever dreamed of thumbing your nose at big energy and its expensive, polluting ways, then Tesla and a solar panel leasing company called SolarCity might be taking you a baby-step closer to reality. Although recognized mostly for its EVs, Tesla reckons it knows enough about batteries to solve a key problem in the solar energy chain -- namely the storage of power for use when the sun, power grid, or both go offline. The battery design, consisting of many laptop-style lithium ion batteries stacked together, was chosen after two years of research and a $1.8 million energy grant. The two companies are now waiting for tax credits from the Fed and California before rolling out the tech. And being kissing cousins -- with Elon Musk as both Chairman of SolarCity and CEO of Tesla -- certainly can't hurt.
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.
Nanoshells trap light for more efficient solar panels
Scientists at Stanford are hard at work trying to improve the efficiency and durability of solar panels -- two key factors that have kept the Sun from becoming a more popular source of energy. Their latest effort involves nanocrystalline-silicon, a material that has proven resilient and highly conductive, but not very good at absorbing light. Their solution, nanoshells -- hollowed out spheres of silicon that trap and recirculate light much like a whispering gallery does sound. Balls of the crystalline material are dipped in silicon, then hydrofluoric acid is used to eat way the center of the sphere, leaving a path for light to enter. The shells trap the light, allowing more of it to be absorbed, and also reduces the effect of non-optimal angles on energy production. Hit up the source for a few more details.
Notre Dame heralds paint-on solar cells, wants to smear your home with its goop (video)
Leave it to the Fighting Irish to take a stab at solving the world's energy woes. Notre Dame researchers have successfully developed solar cells that can be easily painted on to any conductive surface. Imagine, for a moment, applying this solution to your home rather than attaching solar panels to the roof. The paint mixture incorporates quantum dots of titanium dioxide, which is then coated with either cadmium sulfide or cadmium selenide, and is then suspended in mixture of water and alcohol to create a spreadable compound that's capable of generating electricity. While its efficiency isn't currently much to crow home about -- which hovers around one-percent -- scientists are now actively pursuing ways to improve this aspect while making a more stable compound. Most importantly, the paint can be made cheaply and in large quantities, which suggests that even if efficiency remains in the doldrums, it may be a very worthwhile pursuit. Touchdown Jesus is already watching the video after the break.
Has James Bond gone green? Bulletproof electric roadster in the works
Warding off assassins while saving the environment just became a cake walk with the Jo-Mojo, an upcoming creation by Lativian armored vehicle company DARTZ. This two seat convertible roadster brandishes an 80 horsepower electric engine capable of pushing zero to 60 mph in 9.5 seconds and a top speed of 125 mph -- yet most of its "mojo" is outside the hood. Custom seating, color-changing chameleon paint finish, bulletproof tires, and others are just a few of the many "drooling" features. The sunroof is given a task with flexible solar panels built-in, good for juicing up the batteries while idle or on the go. Aimed to hit the market at the end of Q2 2012, its estimated price tag starts at 30,000 euros (~ $40,000), within range of most low-end luxury automobiles. Check past the break for a video slideshow of this snazzy piece of metal by Gray Designs, DARTZ's partner in the venture.
GE's new factory will push out one solar panel every ten seconds
General Electric is sending its troops to Colorado to conquer the thin film solar panel business. The 38th state will play home to a new facility that leverages the supermodel-thin panel know-how of PrimeStar Solar, which GE scooped up back in 2008. In traditional solar panels, sand is refined into silicon ingots, sliced wafers of which are then placed in a frame. The thin film process eliminates this, sandwiching layers of semiconductors between panes of glass -- saving time, money and, most importantly, energy. The factory will open ahead of schedule in 2012 and is reportedly capable of producing a new panel every ten seconds. You can learn all of that and more in the press release we've got for you after the break.
Solar panels light up Yosemite National Park, don't spoil your view
Normally we like to keep our technology and nature reasonably separate, but like peanut butter and chocolate, some combinations turn out better than you'd think. In the latest in a long line of projects funded by the American Recovery and Reinvestment Act, Yosemite National Park has installed over 2,800 solar panels in the El Portal maintenance complex, neatly hidden from the all seeing eyes of the public. The plenitude of photovoltaic plates will produce about 800,000 kWh per year, saving the park $50,000 annually on its power bill and scoring it $700,000 in rebates from PG&E over the next 5 years. The 5.8 million dollar system cuts the park's reliance on carbon fuels by 12 percent, and is now the largest grid-connected solar energy system in the National Park Service. Press release junkies can hit the break for the official announcement; solar fanatics looking for a better view should check out KCRA's coverage in the links below.
Quantum dots could coat the world in nano-sized solar panels
We've long believed in the mystical power of quantum dots, so it makes perfect sense to us that one day they'll be used to fully harness the Sun God's rays and thereby save the planet. The nano-particles turn light into electricity, and could potentially be manufactured cheaply and abundantly enough to coat surfaces in current-generating paint. The main obstacle to this has so far been efficiency: the clever little dots just don't work very hard. However, scientists at the University of Toronto now claim to have discovered a fix. Instead of using a single layer of particles, which can only harvest one meager wavelength from the full gamut of solar light, they added a second coat on top and configured it to be sensitive to an additional part of the spectrum. By adding third and fourth layers, the researchers hope to achieve a commercially viable efficiency of 10-percent within the next five years. We humbly call on Ra to be pleased with their efforts.
Solar Cross e-bike soaks in the sun, powers your pedals
Ah, the bicycle -- that first symbol of locomotive independence from our youth. How we've often wished you came with a motor, solar power and some rechargeable batteries to make that ride less... taxing. Well, chin-up childhood glory days, because Terry Hope's done all that and a bit more. The self-described EV enthusiast outfitted a Specialized FSR bike frame -- chosen for its double crown suspension fork -- with an array of three solar slats, a 24-volt one horsepower motor, and three 5,000mAh Li-ion batteries to assist your pedaling on those grueling uphill climbs. The sun-soaked panels powering this 18-speeder's motor are a homemade mix of polycarbonate sheeting, aluminum and 18- x 6- x 6- inch mono crystalline cells that generate a combined 8.7-volt charge to the batteries of your choosing. While its beneficial turbo boost isn't intended to replace that Harley you've got covered in the garage, it will takeover on those lazy days when you just feel like cruising. Hilarious robot voice over for the environmentally-conscious cyclist after the break.
California raceway gets 1,600 solar panels, flaunts green track status
As far as sports go, the one where you drive cars around in circles several times is likely not one of the most energy efficient. With that in mind, it's nice to see locations like Northern California's Infineon Raceway working toward sustainability, announcing this week the installation of more than 1,600 solar panels. The panels, manufactured by Panasonic, will provide around 41-percent of the Infineon's energy usage. Also on its list of earth-friendly features: a solar-powered billboard and 3,000 sheep, which take care of a lot of the lawn mowing on the grounds and apparently aren't of the electric variety.
B-Squares bring portable solar energy and Arduino compatibility to toy blocks (video)
We've seen plenty of portable solar chargers in our time, but few have looked quite as versatile as B-Squares -- a new collection of 3D modular energy storage devices that can be arranged in various configurations, according to the kind of gadget you're looking to juice. Developed by MIT grads Jordan McRae and Shawn Frayne, each solar-powered B-Square features a sticky microsuction surface, along with magnetic and electric contacts at each corner, making it easy to connect and arrange them in different formations. Rotating a single square will change its electrical circuit, depending on its adjacent connection. Some B-Squares, for example, feature LED surfaces, allowing you to create solar-powered lanterns, while others have solar panels, or simply serve as rechargeable battery sources. There's even a square devoted to Arduino boards, along with another surface designed to dock and charge iPhones. McRae and Frayne have already put together a full "recipe book" of different configurations, though the DIY route seems a lot more enticing to us. Their B-Squares are set to leave the prototype phase on May 1st, at an as yet unspecified price. Check them out in video action after the break. [Thanks, Ryan]
UM students make cheap and portable solar charger / light source for developing nations
Solar power is the most egalitarian of all energy sources, yet residents in many parts of the world still lack access to electricity. Three University of Michigan engineering students have created an affordable solution to this problem -- to the delight of camping geeks everywhere -- with the Emerald, a portable solar panel that does double duty as both a cellphone charger and personal light source. We've seen the personal solar panel idea before, but the price of entry made it an untenable solution for developing nations. Solar-powered light bulbs have been around for a while too, but the Emerald's light lasts for eight hours on a charge (as opposed to the bulbs' two to six hours), and it's able to fully charge a phone in the same time it takes an outlet to do the job. They aim to sell the device for the low, low, price of under twenty bucks for customers in the developing world, which is 90 percent cheaper than other solutions and 100 percent more awesome.
KDDI's biblio Leaf SP02 priced, due out Christmas Day in Japan (update)
E-readers are flooding the market these days, and KDDI has delivered its most recent offering just in time for the holiday season. Since the biblio Leaf SP02's specs were first released, battery life seems to have grown to 13,000 pages, with presumably a few extra thrown in courtesy of its solar array. The device utilizes KDDI's LISMO Book Store and its 20,000 titles to obtain content, and if that isn't enough reading material for you, the company claims that five times as many titles will be available by 2012. All this can be had on Christmas day -- if you're lucky enough to hail from the land of the rising sun, that is. Update: Details on the e-reader, much like the device itself, seem to have gotten lost in translation. As a few readers have pointed out -- and our own Engadget Japanese editor Ittousai confirms -- the SP02 has an "open" price of around ¥15,000 (about $180 in US currency), with 3G prices ranging from ¥525 per month for data on a two-year contract, or ¥1,575 without ($6.28 vs. $19, respectively).
Proposal would put a solar garden on the Brooklyn-Queens Expressway
If you've ever spent any time on New York City's finest roadway, the Brooklyn Queens Expressway, garden is not one of the first words that comes to mind. That could change on one particular strip in Brooklyn if a concept -- which you see above -- gets approved and built. The concept is part of a project calling for solutions to a trench that runs from Carroll Gardens to the Columbia Street Waterfront in Brooklyn. Starr Whitehouse Landscape architects floated three possible solutions for improving the stretch, which would cost between about $10 and $18 million, very cheap in comparison to other projects of this type. The Green Canopy proposal calls for a massive plant covered canopy with solar panels to stretch over top of the entire area making it self-sustaining and reducing noise in the area. Hit up the source to check out the other proposed projects.
Uplink Audio Strap System offers solar power for runners on the run
Designer Adam Hammerman's concept -- the Uplink Audio Strap System -- is for all you sports enthusiasts that want to listen to tunes while running but don't want to be bothered with headphones. It can connect with a variety of different mobile devices, and boasts four ultrasound speakers, meaning that you can hear the music but nobody else can, so you're not disturbing the peace! For outdoorsy types, of course, it would be a much safer system for things like running, since you would still be able to hear the street noise around you, and the device would also have flexible solar panels which charge the speakers on the go. It's just a concept for now, but one we'd like to see in reality.
Toshiba's Charge Grid puts your solar panels to work, smartly charges your EV
Got a bunch of photovoltaic cells and a vehicle that requires electricity? Toshiba's thought up a process dubbed "Charge Grid" by which you can juice the latter efficiently. When the sun's out and the electrons are flowing, it doesn't pay to put them into the grid, so this system stores them in a rechargeable battery ready to rapidly charge your EV. For nighttime when the electricity rates are low, a bidirectional inverter lets you hop right back on the neighborhood grid, so your solar cells are put to good use and your car is always well fed. The company tells Tech-On commercialization of the system is still a few years away, so you've plenty of time to raze that roof antenna in favor of some photosynthesized electricity.
