Spherical glass lens concentrates sunlight by up to 10,000 times, boosts solar cell efficiency

Spherical glass lens concentrates sunlight by up to 10,000 times, boosts solar cell efficiency

Eking out more power from solar cells is an ongoing challenge for scientists, and now architect André Broessel has developed a spherical glass energy generator that’s said to improve efficiency by 35 percent. Acting as a lens, the rig’s large water-filled orb concentrates diffused daylight or moonlight onto a solar cell with the help of optical tracking to harvest electricity. In certain configurations, the apparatus can be used for solar thermal energy generation and even water heating. In addition to the oversized globe, Broessel has cooked up a mobile version of the contraption for domestic use and an array of much smaller ball lenses with dual-axis tracking that offers 40 percent efficiency. These devices aren’t the first venture into concentrated photovoltaics, but they are likely among the most visually impressive. If the Barcelona-based architect’s vision of the future comes true, you’ll be seeing these marbles incorporated into buildings and serving as standalone units. Hit the source links below for the picture spread of prototypes and renders.

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Spherical glass lens concentrates sunlight by up to 10,000 times, boosts solar cell efficiency originally appeared on Engadget on Tue, 28 Aug 2012 09:22:00 EDT. Please see our terms for use of feeds.

Permalink Gizmodo  |  sourceDesignboom, Rawlemon  | Email this | Comments

IBM alliance sets efficiency record for solar power cells using common materials

IBM alliance sets efficiency record for solar power cells using common materials

There have been more than a few solar power efficiency records set in the past few months, let alone years. What makes IBM, DelSolar, Solar Frontier and Tokyo Ohka Kogyo think they can just waltz in and claim a record of their own? By using more commonplace elements in the periodic table, that’s how. The partnership’s new photovoltaic cell based on copper, zinc and tin (CZTS for short) can convert light rays to electric power with a 11.1 percent efficiency rate — still nothing to upset traditional silicon power, but a large 10 percent more efficient than anything else in the class. In its early form, CZTS can already be manufactured through ink printing and could be produced in quantities equivalent to about 500 gigawatts of power per year, or five times more than some of the next-closest alternatives. The group wants to improve CZTS’ efficiency over the course of the next several years, ideally reaching the point where it’s useful as a truly cheap, ubiquitous source of power. We’re looking forward to the day when there’s a little slice of solar energy in just about everything, hopefully including a few more hybrid cars and private aircraft.

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IBM alliance sets efficiency record for solar power cells using common materials originally appeared on Engadget on Mon, 20 Aug 2012 15:27:00 EDT. Please see our terms for use of feeds.

Permalink MIT Technology Review  |  sourceIBM Research  | Email this | Comments

Researchers create record-breaking solar cell, set bar marginally higher

Researchers create record-breaking solar cell, set bar marginally higher

Solar cell development is typically a small numbers game, and a group of researchers at the University of Toronto have managed to eke out a few more percentage points in efficiency with a new record-breaking cell. Setting a high mark for this type of cell, the team’s Colloidal Quantum Dot (CQD) film harvests both visible and non-visible light at seven percent efficiency, a 37 percent increase over the previous record. The breakthrough was achieved by leveraging organic and inorganic chemistry to make sure it had fewer nooks and crannies that don’t absorb light. With the advantages of relatively speedy and cheap manufacturing, the technology could help lead the way for mass production of solar cells on flexible substrates. In the meantime, check out the source for the scientific lowdown.

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Researchers create record-breaking solar cell, set bar marginally higher originally appeared on Engadget on Sun, 05 Aug 2012 03:23:00 EDT. Please see our terms for use of feeds.

Permalink IEEE Spectrum  |  sourceUniversity of Toronto  | Email this | Comments

Inhabitat’s Week in Green: energy-harvesting toilet, LED lightbulb overhaul and a floating, solar-powered resort home

Each week our friends at Inhabitat recap the week’s most interesting green developments and clean tech news for us — it’s the Week in Green.

DNP This Week in Green TKTKTK

LED technology shone brighter than the summer sun this week as artist Bruce Munro unveiled plans for his largest lighting installation ever — a field of thousands of LED flowers that will spring up next year at Australia’s Ayers Rock. Best of all, the entire installation will be powered by solar energy! We also saw Rice University flip the switch on its new Epiphany Skyspace — a green-roofed pavilion that’s topped with a brilliant blue canopy of light. If you’re still not convinced that LEDs are the future, we recently produced two videos that are sure to show you the light — check out our interview with five professional lighting designers on today’s state of the art LED bulbs and watch as we give Inhabitots editor Julie Seguss a light bulb overhaul that shaves over $400 off her utility bills. And if you’re ready to make the switch, check out our guide to 24 gorgeous green lamps that look great with LED bulbs.

This week saw some exciting new developments in the realm of renewable energy. First, a group of scientists in the UK developed a new energy-harvesting device that attaches to the joint between the thigh and shin. The device could be used to power monitors and mobile devices, to name a few possible applications. Meanwhile, scientists from Nanyang Technological University in Singapore have invented a new toilet that turns human waste into electricity while reducing the amount of water needed for flushing by up to 90 percent. That’s what we call, win-win!

Continue reading Inhabitat’s Week in Green: energy-harvesting toilet, LED lightbulb overhaul and a floating, solar-powered resort home

Inhabitat’s Week in Green: energy-harvesting toilet, LED lightbulb overhaul and a floating, solar-powered resort home originally appeared on Engadget on Sun, 01 Jul 2012 20:00:00 EDT. Please see our terms for use of feeds.

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