Keyword: solarcells

Brevity: Headers | « Text »
  • Researchers Produce Transparent Solar Cell

    07/22/2012 1:13:44 PM PDT · by Ernest_at_the_Beach · 28 replies
    Hardocp ^ | Sunday July 22, 2012
    An improvement in the makeup of solar cells generates electricity while maintaining a 70% transparency, making it adaptable to homes and businesses to reduce energy costs. The polymer solar cell is light, flexible and cheap to produce. If this goes into mass production, it could spell the end of unsightly bulky roof mounted solar panels. "These results open the potential for visibly transparent polymer solar cells as add-on components of portable electronics, smart windows and building-integrated photovoltaics and in other applications" Comments
  • Solar Cells 23,000 Times Worse for Environment Than Carbon Dioxide

    07/15/2012 7:00:09 AM PDT · by dennisw · 19 replies
    www.thedailybell.com/ ^ | Monday, June 25, 2012
    New Book: Solar Cells 23,000 Times Worse for Environment Than Carbon Dioxide Tuesday, June 05, 2012 – by Staff Report Solar Cells Linked to Greenhouse Gases Over 23,000 Times Worse than According to New Book, Green Illusions ... Solar cells do not offset greenhouse gases or curb fossil fuel use in the United States according to a new environmental book, Green Illusions (June 2012, University of Nebraska Press), written by University of California - Berkeley visiting scholar Ozzie Zehner. Green Illusions explains how the solar industry has grown to become one of the leading emitters of hexafluoroethane (C2F6), nitrogen...
  • An invisible menace for solar cells

    05/02/2012 1:59:44 PM PDT · by neverdem · 6 replies
    Chemistry World ^ | 19 April 2012 | Charlie Quigg
    US chemists have shown that trace impurities - below the sensitivity of standard characterisation techniques - can halve the efficiency of bulk heterojunction (BHJ) solar cells. Their finding means that initially promising materials for device applications may have been written off prematurely owing to their low efficiencies.  Trace impurities are difficult to detect owing to their similarity to donor molecules in solar cells. The impurities can significantly influence photovoltaic properties Unlike traditional inorganic solar cells, polymer cells do not immediately create charge carriers but instead create electron-hole pairs called excitons over a donor-acceptor interface, which migrate to the electrodes. In...
  • TSMC confident of making CIGS PV modules comparable with solar cells, says chairman

    04/26/2011 7:48:01 AM PDT · by Ernest_at_the_Beach · 6 replies
    DIGITIMES ^ | Tuesday 26 April 2011 | Nuying Huang, Taipei; Jackie Chang, DIGITIMES
    Taiwan Semiconductor Manufacturing Company (TSMC) is technologically capable of producing CIGS (copper-indium-gallium-selenide) thin-film PV (photovoltaic) modules with energy conversion rates on a par with those for PV modules made of crystalline silicon solar cells, according to company chairman Morris Chang. TSMC received CIGS technology from US-based Stion through stake investment and is setting up a factory in central Taiwan.
  • CA: Editorial: Green jobs cut despite government subsidy

    11/12/2010 10:19:17 AM PST · by Ernest_at_the_Beach · 17 replies
    THE ORANGE COUNTY REGISTER ^ | Nov. 10, 2010 | Editors
    Listening to outgoing Gov. Arnold Schwarzenegger and incoming Gov. Jerry Brown, Californians might think the California economy's salvation lies in so-called "green jobs," which now account for about 3 percent of the state's workforce. What boosters of green jobs don't usually mention is most of these jobs require substantial taxpayer subsidies and other special government treatment even to exist in a competitive market. It appears now that even a half-billion dollars in government aid is no guarantee of success. President Barack Obama, center, poses for a photo with construction workers building a new Solyndra, Inc., a solar panel manufacturing facility,...
  • Organic Crystal Allows Excitons to Travel Further, Produces More Efficient Plastic Solar Cells

    10/12/2010 10:33:05 AM PDT · by Ernest_at_the_Beach · 14 replies
    Daily Tech ^ | October 11, 2010 10:56 AM | Tiffany Kaiser
    Rubrene crystal raises hope for the use of organic semiconductors and cheaper, more efficient solar cells Rutgers University physicists have found new properties within a material that could lead to the production of less expensive and more efficient plastic solar cells. Vitaly Podzorov, co-author of the study and assistant professor of physics at Rutgers University, along with his research team have discovered that organic semiconductors allow energy-carrying particles -- which are created by "packets" of light -- to journey a thousand times farther than researchers previously thought. "Organic semiconductors are promising for solar cells and other uses, such as video displays, because they can be...
  • New electrolyte for dye-based solar cells

    04/06/2010 1:51:56 AM PDT · by neverdem · 8 replies · 519+ views
    Chemistry World ^ | 04 April 2010 | Simon Hadlington
    Researchers have moved a step closer to overcoming one of the key hurdles to developing low-cost solar cells based on dye-coated titanium dioxide.Dye-sensitised solar cells (DSCs) were invented by Michael Grätzel and Brian O'Regan some 20 years ago, and consist of a thin film of titanium dioxide coated with a ruthenium-based dye, in contact with a redox electrolyte.  Dye-based solar cells could offer a cheaper alternative to silicon-based photovoltaics While dye-based systems are less efficient in converting solar energy than photovoltaic cells made from silicon, they are likely to become cheaper to manufacture and be more versatile in a number...
  • Efficient solar cells from silicon wires

    02/18/2010 8:38:08 PM PST · by neverdem · 47 replies · 809+ views
    Chemistry World ^ | 14 February 2010 | Simon Hadlington
    US researchers have designed a new silicon-based solar cell which uses 100 times less silicon than conventional photovoltaic devices. The system relies on the geometry of the silicon being reconfigured from a flat wafer to arrays of tiny silicon rods aligned vertically on the cell.Currently silicon solar cells are fabricated on brittle wafers of silicon around 100-200 micrometres thick. While these can be relatively efficient in terms of conversion of light energy to electrical energy - up to 25 per cent - relatively large quantities of silicon material are needed, which is a significant part of the cost of the...
  • Big Blue boffins hatch dirt-cheap solar cells -- 'Earth abundant' materials

    02/16/2010 9:20:09 AM PST · by Ernest_at_the_Beach · 9 replies · 524+ views
    The Register ^ | 12th February 2010 08:02 GMT | Rik Myslewski in San Francisco
    IBM researchers have developed a new class of solar-powered electricity-generating cells that they claim will bring photovoltaic cells closer to cost parity with conventional energy sources. The researchers from IBM's T. J. Watson Research Center in Yorktown Heights, New York have published their findings in a paper entitled "High-Efficiency Solar Cell with Earth-Abundant Liquid-Processed Absorber," available here (PDF). The materials used in the new cell are copper, zinc, tin, selenium, and sulfur - the latter two "earth-abundant" materials being in a chalcogenide compound, key to the photovoltaic properties of the cell. The use of these materials bypasses problems inherent in...
  • US lab births flexy, stingy solar cells - 99 per cent less silicon

    02/16/2010 9:14:53 AM PST · by Ernest_at_the_Beach · 26 replies · 603+ views
    The Register ^ | 16th February 2010 06:02 GMT | Rik Myslewski in San Francisco
    A team of US research scientists have made a startling breakthrough in solar-cell development, creating flexible wire-based cell substrates that use just one per cent of the silicon needed for brittle and comparatively heavy conventional cells. Solar cells made from this material would not only be less expensive than current photovoltaics, but due to their low weight and bendable structure the could be used in a wide variety of applications. Solar curtains, anyone? The new technique is described in a paper nimbly entitled "Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications" published in Nature Materials by...
  • Nature's hot green quantum computers revealed

    02/03/2010 4:47:15 PM PST · by neverdem · 20 replies · 571+ views
    New Scientist ^ | 03 February 2010 | Kate McAlpine
    WHILE physicists struggle to get quantum computers to function at cryogenic temperatures, other researchers are saying that humble algae and bacteria may have been performing quantum calculations at life-friendly temperatures for billions of years. The evidence comes from a study of how energy travels across the light-harvesting molecules involved in photosynthesis. The work has culminated this week in the extraordinary announcement that these molecules in a marine alga may exploit quantum processes at room temperature to transfer energy without loss. Physicists had previously ruled out quantum processes, arguing that they could not persist for long enough at such temperatures to...
  • Researchers boost solar cell efficiency

    11/25/2008 12:19:00 AM PST · by neverdem · 25 replies · 1,163+ views
    MIT via PhysOrg.com ^ | Nov 24, 2008 | NA
    New ways of squeezing out greater efficiency from solar photovoltaic cells are emerging from computer simulations and lab tests conducted by a team of physicists and engineers at MIT. Using computer modeling and a variety of advanced chip-manufacturing techniques, they have applied an antireflection coating to the front, and a novel combination of multi-layered reflective coatings and a tightly spaced array of lines — called a diffraction grating — to the backs of ultrathin silicon films to boost the cells’ output by as much as 50 percent. The carefully designed layers deposited on the back of the cell cause the...
  • Toward textile-based solar cells

    08/31/2008 7:46:59 AM PDT · by neverdem · 18 replies · 261+ views
    spie.org ^ | NA | Max Shtein
    Related Links Relevant Reading: Optoelectronics of Solar Cells Solar & Alternative Energy in the SPIE Digital Library Career Solutions: spieworks.org Solar & Alternative Energy Toward textile-based solar cells Max Shtein A fiber-based organic photovoltaic may form the building block of cost- effective, energy-harvesting textiles. A 100km2 area covered with 10% efficient solar cells can produce enough electricity to satisfy the national requirement.1 Unfortunately, the total area of cells produced and installed to date is 1,000 times smaller than needed. Despite the high annual growth rate of the photovoltaic (PV) industry, current manufacturing methods face a scalability barrier that makes fulfilling...
  • Self-Cooling Soda Bottles? [thin-film technology may make conventional A/C obsolete]

    07/11/2006 3:21:09 PM PDT · by LibWhacker · 41 replies · 1,383+ views
    Researchers work to shrink technology that harnesses sun's energy to both heat and coolEvery day, the sun bathes the planet in energy--free of charge--yet few systems can take advantage of that source for both heating and cooling. Now, researchers are making progress on a thin-film technology that adheres both solar cells and heat pumps onto surfaces, ultimately turning walls, windows, and maybe even soda bottles into climate control systems. On July 12, 2006, Rensselaer Polytechnic Institute (RPI) researcher Steven Van Dessel and his colleagues will announce their most recent progress--including a computer model to help them simulate the climate within...
  • Next-Generation Solar Cells Could Put Power Stations In Space-(and Wahhabists with heads in sand)

    04/24/2005 7:36:01 PM PDT · by CHARLITE · 10 replies · 819+ views
    SPACE DAILY.COM ^ | January 8, 2003 | Staff
    Someday, large-scale solar power stations in space could beam electricity to the surface of the moon, the earth and other planets, decreasing our dependence on a dwindling fossil-fuel supply. Scientists at Rochester Institute of Technology are developing the next generation of solar cells, advancing the technology that could put a solar power system into earth's orbit. The National Science Foundation recently awarded a three-year, $200,000 grant to Ryne Raffaelle and Thomas Gennett, co-directors of RIT's NanoPower Research Laboratory, to develop nanomaterials--no bigger than a billionth of a meter--in support of NASA's space solar power program. The notion of space solar...
  • Material grabs more sun ( Potential efficiency increase in Solar Cells )

    04/23/2004 8:54:59 AM PDT · by Ernest_at_the_Beach · 16 replies · 359+ views
    Technology Research News ^ | April 21/28, 2004 | Kimberly Patch,
    One way to make solar cells more efficient is to find a material that will capture energy from a large portion of the spectrum of sunlight -- from infrared to visible light to ultraviolet. Energy transfers from photons to a photovoltaic material when the material absorbs lightwaves that contain the same amount of energy as its bandgap. A bandgap is the energy required to push an electron from a material's valence band to the conduction band where electrons are free to flow. The trouble is, most photovoltaic materials absorb a relatively narrow range of light energy. The most efficient silicon...
  • New Motorola process could bring down cost of big TVs

    07/07/2003 5:51:07 PM PDT · by PeaceBeWithYou · 19 replies · 413+ views
    Chicago Sun Times ^ | July 2, 2003 | BY HOWARD WOLINSKY
    From atomic-scale "carbon nanotubes," Motorola Inc. has sprouted a new technology that will make it possible for the first time for manufacturers to easily grow and inexpensively produce the material to make large-scale TV and computer display tubes, the Schaumburg technology company announced Tuesday. In addition to its use in producing 60-inch and larger displays at a retail price potentially below $1,000--a fraction of the current cost for plasma displays--the new Motorola process will have a variety of other applications, researchers said. It could be used in devices to detect and eradicate infectious microbes, such as that causing the...
  • Tetrapod nanocrystals could improve solar cells

    06/10/2003 11:30:03 AM PDT · by Ernest_at_the_Beach · 30 replies · 551+ views
    Advanced Technologies ^ | June 9, 2003 (3:04 p.m. ET) | R. Colin Johnson EE Times
    PORTLAND, Ore. — A new shape for semiconductor nanocrystals—tetrapods, rather than simple spheres, rods and disks—could double the efficiency of "plastic" solar cells, according to the inventor of tetrapods. Paul Alivisatos, the inventor of semiconductor tetrapods and a professor at the University of California at Berkeley, said they promise to convert twice as much incident light into electricity. Tetrapods also promise to improve chemical sensors, biomedicine and optoelectronic devices, as well as serving as strengthening additives to plastic composites. "We have been studying these materials [II-VI semiconductors like cadmium tellurium, CdTe] because we already take rodsshapes of it and put...