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shijinwen金虫 (小有名气)
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美国太阳能电池创光电转换率新纪录（４０．７％）
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新华网华盛顿１２月６日电 美国能源部６日发布消息说，美国一家机构制造的太阳能电池创造了光电转换效率４０．７％的新纪录。 这种太阳能电池由美国波音－光谱实验室制造，其电池板采用了不同的半导体材料，各种材料的交界面形成了特殊薄层。这样的结构能使电池板“包容”的光谱范围更大。与普通太阳能电池相比，新电池能“抓住”阳光中更多种波长的光子，从而使光电转换率达到４０．７％，而目前广泛使用的太阳能电池光电转换率仅为１３％至２２％。 美国能源部认为，上述研发成果迈出了重要一步，以此为基础有望最终研制出理想的太阳能电池。据估算，功率为１瓦的这种电池安装费只有３美元，发电成本为每千瓦时８－１０美分。这样的太阳能电池将极具市场竞争力。 [ Last edited by luo.henry on 2008-4-10 at 14:17 ] |
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hexingyi 
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很有前途啊 2楼2006-12-09 22:22:48
ycwbycwb
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支持一下楼主，以下是DOE和Boeing的英文介绍。 December 5, 2006 New World Record Achieved in Solar Cell Technology New Solar Cell Breaks the “40 Percent Efficient” Sunlight-to-Electricity Barrier WASHINGTON, DC – U.S. Department of Energy (DOE) Assistant Secretary for Energy Efficiency and Renewable Energy Alexander Karsner today announced that with DOE funding, a concentrator solar cell produced by Boeing-Spectrolab has recently achieved a world-record conversion efficiency of 40.7 percent, establishing a new milestone in sunlight-to-electricity performance. This breakthrough may lead to systems with an installation cost of only $3 per watt, producing electricity at a cost of 8-10 cents per kilowatt/hour, making solar electricity a more cost-competitive and integral part of our nation’s energy mix. “Reaching this milestone heralds a great achievement for the Department of Energy and for solar energy engineering worldwide,” Assistant Secretary Karsner said. “We are eager to see this accomplishment translate into the marketplace as soon as possible, which has the potential to help reduce our nation’s reliance on imported oil and increase our energy security.” Attaining a 40 percent efficient concentrating solar cell means having another technology pathway for producing cost-effective solar electricity. Almost all of today’s solar cell modules do not concentrate sunlight but use only what the sun produces naturally, what researchers call “one sun insolation,” which achieves an efficiency of 12 to 18 percent. However, by using an optical concentrator, sunlight intensity can be increased, squeezing more electricity out of a single solar cell. The 40.7 percent cell was developed using a unique structure called a multi-junction solar cell. This type of cell achieves a higher efficiency by capturing more of the solar spectrum. In a multi-junction cell, individual cells are made of layers, where each layer captures part of the sunlight passing through the cell. This allows the cell to get more energy from the sun’s light. For the past two decades researchers have tried to break the “40 percent efficient” barrier on solar cell devices. In the early 1980s, DOE began researching what are known as “multi-junction gallium arsenide-based solar cell devices,” multi-layered solar cells which converted about 16 percent of the sun’s available energy into electricity. In 1994, DOE’s National Renewable Energy laboratory broke the 30 percent barrier, which attracted interest from the space industry. Most satellites today use these multi-junction cells. Reaching 40 percent efficiency helps further President Bush’s Solar America Initiative (SAI) goals, which aims to win nationwide acceptance of clean solar energy technologies by 2015. By then, it is intended that America will have enough solar energy systems installed to provide power to one to two million homes, at a cost of 5 to 10 cents per kilowatt/hour. The SAI is also key component of President Bush’s Advanced Energy Initiative, which provides a 22 percent increase in research and development funding at DOE and seeks to reduce our dependence on foreign sources of oil by changing the way we power our cars, homes and businesses. [ Last edited by ycwbycwb on 2006-12-9 at 22:26 ] |
3楼2006-12-09 22:24:15
ycwbycwb
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Boeing Spectrolab Terrestrial Solar Cell Surpasses 40 Percent Efficiency ST. LOUIS, Dec. 06, 2006 -- Boeing [NYSE: BA] today announced that Spectrolab, Inc., a wholly-owned subsidiary, has achieved a new world record in terrestrial concentrator solar cell efficiency. Using concentrated sunlight, Spectrolab demonstrated the ability of a photovoltaic cell to convert 40.7 percent of the sun's energy into electricity. The U.S. Department of Energy's National Renewable Energy Laboratory (NREL) in Golden, Colo., verified the milestone. "This solar cell performance is the highest efficiency level any photovoltaic device has ever achieved," said Dr. David Lillington, president of Spectrolab. "The terrestrial cell we have developed uses the same technology base as our space-based cells. So, once qualified, they can be manufactured in very high volumes with minimal impact to production flow." High efficiency multijunction cells have a significant advantage over conventional silicon cells in concentrator systems because fewer solar cells are required to achieve the same power output. This technology will continue to dramatically reduce the cost of generating electricity from solar energy as well as the cost of materials used in high-power space satellites and terrestrial applications. "These results are particularly encouraging since they were achieved using a new class of metamorphic semiconductor materials, allowing much greater freedom in multijunction cell design for optimal conversion of the solar spectrum," said Dr. Richard R. King, principal investigator of the high efficiency solar cell research and development effort. "The excellent performance of these materials hints at still higher efficiency in future solar cells." Spectrolab is reducing the cost of solar cell production through research investments and is working with several domestic and international solar concentrator manufacturers on clean, renewable solar energy solutions. Currently, Spectrolab's terrestrial concentrator cells are generating power in a 33-kilowatt full-scale concentrator system in the Australian desert. The company recently signed multi-million dollar contracts for its high efficiency concentrator cells and is anticipating several new contracts in the next few months. Development of the high-efficiency concentrator cell technology was funded by the NREL's High Performance Photovoltaics program and Spectrolab. |
4楼2006-12-09 22:24:50
crante
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5楼2006-12-14 15:40:16
zhangjs
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6楼2006-12-14 17:54:03
