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Topic: Solar cell



  
 Solar cell - Wikipedia, the free encyclopedia
Solar cells are often electrically connected and encapsulated as a module, termed a solar panel.
Because solar cells are semiconductor devices, they share many of the same processing and manufacturing techniques as other semiconductor devices such as computer and memory chips.
Solar cells are also usually connected in series in modules, creating an additive voltage.
http://en.wikipedia.org/wiki/Solar_cell   (4891 words)

  
 Solar panel - Wikipedia, the free encyclopedia
Together with a backup battery, solar photovoltaics have become routine in certain low-power applications, such as powering buoys or devices in remote areas or simply where connection to the electricity mains would be impractical.
The ESA is researching the possibility of solar power satellites that would generate electricity in space and then beam it to Earth via laser or microwaves.
A Solar panel is a flat collection of solar cells or solar thermal collectors used for converting solar energy into electricity or heat.
http://en.wikipedia.org/wiki/Solar_panel   (1580 words)

  
 OLYMPUS MIC-D: Interactive Java Tutorial - Solar Cell Operation
The voltage produced in the cell is capable of driving a current through an external electrical circuit that can be utilized to power electrical devices.
Solar cells convert light energy into electrical energy either indirectly by first converting it into heat, or through a direct process known as the photovoltaic effect.
In the construction of a photovoltaic cell, metal contact layers are applied to the outer faces of the two semiconductor layers, and provide a path to the external circuit that connects the two layers.
http://www.mic-d.com/java/solarcell   (1077 words)

  
 Solar Energy
Solar thermal power generation is essentially the same as conventional technologies except that in conventional technologies the energy source is from the stored energy in fossil fuels released by combustion.
Solar thermal power plants use the sun's rays to heat a fluid, from which heat transfer systems may be used to produce steam.
The power-generating equipment used with a solar dish can be mounted at the focal point of the dish, making it well suited for remote operations or, as with the solar trough, the energy may be collected from a number of installations and converted to electricity at a central point.
http://www.eia.doe.gov/kids/energyfacts/sources/renewable/solar.html   (1949 words)

  
 Howstuffworks "How Solar Cells Work"
There are solar cell arrays on satellites, where they are used to power the electrical systems.
This current, together with the cell's voltage (which is a result of its built-in electric field or fields), defines the power (or wattage) that the solar cell can produce.
Rollable solar panels exist that allow you to generate enough energy to power a laptop, cell phone or other digital camera while you're away from conventional sources of electricity.
http://www.howstuffworks.com/solar-cell.htm   (1172 words)

  
 Technology Review: Emerging Technologies and their Impact
Solar cells mixed into automotive paint could allow the sun to charge the batteries of hybrid cars, reducing their need for fuel.
Flexible films laminated onto laptops and cell phones could provide a steady trickle of electricity, reducing the need to plug in for power.
Soon your cell phone may be powered by the sun.
http://www.technologyreview.com/articles/04/07/fairley0704.asp   (317 words)

  
 Solar Cell Selection for Mars
The implication of this for solar cell selection is that concentration technologies (such as mirrors or lenses) will be much less effective than planar technologies which accept light from a wide range of angles, and the efficiency of concentration devices will be worst at the highest dust loadings, when efficiency is most critical.
Thus, the solar operational information we received from Pathfinder and will get from the 1998-99 mission will be important in that it verifies operation of solar arrays on Mars, but is insufficient to use for design of future large power systems which will operate for long periods on the Martian surface.
However, if the solar array environment is exposed to significant amounts of water vapor (for example, if a life-support system for astronauts produces a warm, water-vapor laden effluent), then steps may have to be taken to prevent corrosion.
http://powerweb.grc.nasa.gov/pvsee/publications/wcpec2/cells4mars.html   (3147 words)

  
 Chapter 3: Electrochemistry
A solar cell is a device for converting energy from the sun into electricity.
The cell produces 50 microamps at 0.25 volts.
The solar cell is a battery, even in the dark, and will usually show a few microamps of current.
http://www.scitoys.com/scitoys/scitoys/echem/echem2.html   (1470 words)

  
 Solar Cell Technologies
Each c-Si cell generates about 0.5V, so 36 cells are usually soldered together in series to produce a module with an output to charge a 12V battery.
Concentrators have not yet achieved widespread application in photovoltaics, but solar concentration has been widely used in solar thermal electricity generation technology where the generated heat is used to power a turbine.
This has led to the development of a range of approaches using mirrors or lenses to focus light on to specially designed cells and use heat sinks, or active cooling of the cells, to dissipate the large amount of heat that is generated.
http://www.solarbuzz.com/Technologies.htm   (1370 words)

  
 SOLAR ENERGY
Photovoltaic (PV) cells are devices that convert sunlight to electricity, bypassing thermodynamic cycles and mechanical generators.
The photovoltaic cells were developed at Bell Labs in 1950 primarily initially for space applications.
In addition, the operation of silicon cells require a cooling system, because performance degrades at high temperatures.
http://www.history.rochester.edu/class/solar/cells.htm   (357 words)

  
 2005 Solar & Fuel Cell Race Rules
The solar cell is to be used for electrolysis only; it may not be used to charge up any auxiliary power systems, or stored on the vehicle in any way.
The solar cell is separated from the vehicle after recharging.
Six solar cells in series to produce an output voltage (Vmax) of not less than 2.76 volts @ 3 watts; the final determination shall depend on motor selection and availability.
http://www.txses.org/tjss/Race_Rules.htm   (2697 words)

  
 Solar Cell Power Doubler - KeelyNet 12/17/01
Conventional semiconductor solar cells are made of polycrystalline silicon or, in the case of the highest efficiency ones, crystalline gallium arsenide.
The best solar cells, which are very expensive semiconductor laminates, convert, at most, 35 percent of the sun's energy into electricity.
To reduce the cost of expensive solar electric cells, he developed a process that intensifies sunlight before it is converted into electricity.
http://www.keelynet.com/energy/sylcell.htm   (2914 words)

  
 Boeing: Spectrolab Terrestrial Concentrator Solar Cell Achieves Unparalelled Solar Energy Conversion
Due to the higher efficiency of multijunction cells used in the concentrator modules, only a small fraction of the cell area is required to generate the same power output compared to crystalline silicon or thin-film flat-plate modules.
A significant advantage of concentrator systems is that fewer solar cells are required to achieve a specific power output, thus replacing large areas of semiconductor materials with relatively inexpensive optics that provide optical concentration.
During the last few years, multijunction solar cells have doubled the power output of large commercial satellites, and substantially improved their revenue-generating capability.
http://www.boeing.com/news/releases/2003/q3/nr_030725s.html   (663 words)

  
 NREL: Solar Research Home Page
Learn more about solar energy technologies such as photovoltaic (solar cell) systems, concentrating solar systems, passive solar heating and daylighting, solar hot water, and solar process heat and space cooling.
Solar technologies use the sun's energy to provide heat, light, hot water, electricity, and even cooling, for homes, businesses, and industry.
Solar thermal research is performed in NREL's Center for Buildings and Thermal Systems.
http://www.nrel.gov/solar   (394 words)

  
 An unexpected discovery could yield a full spectrum solar cell
The maximum efficiency a solar cell made from a single material can achieve in converting light to electrical power is about 30 percent; the best efficiency actually achieved is about 25 percent.
Silicon is cheap, for example, but in converting light to electricity it wastes most of the energy as heat.
While photons with energy higher than the band gap are absorbed -- for example, blue light photons in a low-band gap semiconductor -- their excess energy is wasted as heat.
http://www.lbl.gov/Science-Articles/Archive/MSD-full-spectrum-solar-cell.html   (1378 words)

  
 Solar Energy Technologies Program: Solar Cell Structures
In the mechanical stack approach, two individual solar cells are made independently, one with a high bandgap and one with a lower bandgap.
Some homojunctions cells have also been designed with the positive and negative electrical contacts on the back of the cell.
A disadvantage is that the charge carriers, which are mostly generated near the top surface of the cell, must travel farther—all the way to the back of the cell—to reach an electrical contact.
http://www.eere.energy.gov/solar/solar_cell_structures.html   (983 words)

  
 National Center for Photovoltaics - Most Efficient Monolithic Solar Cell
Jerry Olson and Sarah Kurtz test the voltage output of a laboratory multijunction solar cell, which achieved record efficiencies in converting sunlight to electricity and is the basis for the Spectrolab cell.
A solar cell that can convert sunlight to electricity at a record-setting 32% efficiency has been developed by the National Renewable Energy Laboratory (NREL) and Spectrolab.
This high rate of converting sunlight to electricity has made the multijunction (gallium indium phosphide on gallium arsenide) design valuable for powering space satellites, the primary market for this type of solar cell.
http://www.nrel.gov/ncpv/spectrocell.html   (435 words)

  
 Eco-Economy Indicators: SOLAR CELL SALES
For the 1.5-2 billion people whose homes are not connected to an electrical grid, solar cells are typically the cheapest source of electricity.
The replacement of a kerosene lamp with a 40-watt solar module eliminates up to 106 kilograms of carbon emissions a year.
In remote areas, delivering small amounts of electricity through a large grid is cost-prohibitive, so people not close to a grid will likely obtain electricity from solar cells.
http://www.earth-policy.org/Indicators/indicator12.htm   (1152 words)

  
 CNN - Solar cell efficiency makes big leaps - October 27, 1999
Because the multi-junction cells are more efficient, only about one-half of the real estate is require to generate the same power output compared to crystalline silicon or thin-film flat-plate modules, according to Spectrolab.
By doubling the power generating efficiency of the cell, the size of the solar ray collection system can be reduced in half, thereby reducing the overall cost of the infrastructure," said Lillington.
The concentrator system gains its advantage over traditional silicon solar cells by replacing the semiconductor portion with inexpensive optics (that provide optical concentration).
http://www.cnn.com/NATURE/9910/27/solar.cells.enn   (576 words)

  
 Solar Cell Manufacturing Plants
Frames are usually applied to allow for mounting in the field, or the laminates may be separately integrated into a mounting system for a specific application such as building integration.
However, as growth of the PV industry is overtaking that for semiconductors, this scrap is in short supply and an increasing proportion of more expensive prime-grade Si is having to be used as meltstock.
Crystal growing and casting are metallurgical processes which are relatively energy intensive since they are processing molten silicon at around 1600°C. They consist of a large number of units of process equipment operating in parallel.
http://www.solarbuzz.com/Plants.htm   (1349 words)

  
 Protein Power: Solar cell produces electricity from spinach and bacterial proteins: Science News Online, June 5, 2004
To boost the solar cell's power output, Baldo and his colleagues are exploring ways of packing more photosynthetic proteins into their 1-millimeter-by-1-millimeter device.
To make the solar cell, a team of biologists and engineers led by Marc Baldo of the Massachusetts Institute of Technology (MIT) harvested photosynthetic proteins from spinach and the bacterium Rhodobacter sphaeroides and deposited the proteins onto a glass support.
In this prototype solar cell, photosynthetic proteins (spheres embedded in yellow peptides) absorb light and pump electrons (e
http://www.sciencenews.org/articles/20040605/fob2.asp   (693 words)

  
 Clare Template
Clare’s flexible Solar Cell architecture facilitates product family growth by means of it’s scalable technology thus paving the way for future solar cell offerings with different voltage and current ratings.
These voltage levels correlate to common circuit board power supply voltages making the solar cell ideal for battery charging applications and trickle charge power sources.
The Solar Cell product family offers several open circuit voltage levels (4, 8 or 16 Volts) when activated by natural or artificial light.
http://www.clare.com/Products/SolarCell.htm   (227 words)

  
 Samsung's Solar Cell Breakthrough Tech Toys & Cars GoldSea Asian American Supersite
Unlike conventional silicon cells, which are heavy and black, titanium oxide cells are transparent and practical for powering cars, ultra-light portable phones and computers, watches and commercial buildings.
Samsung plans to use the solar cell to power cellphones, PDAs, household power generators and telecom satellites.
Last May researchers at the state-funded Electronics and Telecommunications Research Institute (ETRI) developed a functioning solar cell using titanium oxide in place of silicon.
http://goldsea.com/Tech/01/02/solar_samsung.html   (368 words)

  
 New Scientist Breaking News - Most efficient solar cell yet revealed
Solar power experts have welcomed the development, but point out that much work remains to be done before the Sun's energy can be much more widely harnessed.
But the record energy conversion rate was achieved by modifying alloy elements in the top and middle layers.
"There is an awful lot of the world not on the electricity grid, where solar power makes a lot of sense," he says.
http://www.newscientist.com/article.ns?id=dn4033   (455 words)

  
 Welcome to Sundance Solar - solar energy, solar battery chargers, rechargeable batteries, educational kits
SundanceSolar.Com is your best source for solar energy products, rechargeable batteries, battery chargers, solar battery chargers, solar panels, educational kits, solar gifts and even the newest flexible, rollable solar panels.
Welcome to Sundance Solar - solar energy, solar battery chargers, rechargeable batteries, educational kits
Whether you're trying to power your digital camera, video camera or cell phone or building a solar project with the kids, Sundance Solar has your solar energy solution.
http://store.sundancesolar.com   (192 words)

  
 Chapter 3: Electrochemistry
I made a more portable version of the solar cell in a flat panel form.
Fill the cell up almost to the top of the copper plate, so it almost spills out.
This time I sanded one corner clean all the way down to the shiny copper, and soldered an insulated copper wire to it for the negative lead.
http://www.scitoys.com/scitoys/scitoys/echem/echem3.html#sflatpanel   (612 words)

  
 Georgia Institute of Technology :: News Room :: Tech Developing Efficient Organic Solar Cell
Their flexibility and minimal weight will allow them to be placed on almost anything from tents that would provide power to those inside, to clothing that would power personal electronic devices.
“We’ve demonstrated that using a crystalline organic film, pentacene, is a promising new approach to developing organic solar cells,” said Bernard Kippelen, professor in the Center for Organic Photonics and Electronics and the School of Electrical and Computer Engineering at Georgia Tech.
Made from cheaper materials, their flexibility and feather-weight construction promise to open up new markets for solar energy, potentially powering everything from Radio-Frequency Identification (RFID) tags to iPods and laptop computers.
http://www.gatech.edu/news-room/release.php?id=497   (845 words)

  
 Spray-On Solar-Power Cells Are True Breakthrough
Scientists have invented a plastic solar cell that can turn the sun's power into electrical energy, even on a cloudy day.
A sweater coated in the material could power a cell phone or other wireless devices.
A hydrogen-powered car painted with the film could potentially convert enough energy into electricity to continually recharge the car's battery.
http://news.nationalgeographic.com/news/2005/01/0114_050114_solarplastic.html   (528 words)

  
 Solar Cell Phone Charger for Sale
I know there was SOME cell phone usage, but no electricity and often a wiped out car, therefore nothing to charge the phone with.
Kleinfeld was inspired to design the solar powered cell phone charger while on vacation at a local fair in Shenzen, China.
Then again, you might find that this is just the solution you've been looking for, if you are out and about a lot, and an expensive battery that probably won't endure many cycles is not a problem for you.
http://pesn.com/2005/09/30/9600179_Solar_Cell_Phone_Charger   (882 words)

  
 Wired News: Through the Solar Looking Glass
The chips convert the light energy into electrical power and feed it into the building's electrical system; the energy goes into the heating and cooling systems.
They plan to combine a series of highly efficient, low-cost technologies into a single sustainable device that would be almost transparent to those using its energy.
To use a highly nontechnical term, call the devices solar window shades.
http://www.wired.com/news/technology/0,1282,60301,00.html   (705 words)

  
 Solar Cell Phone Charger - Compare Prices, Reviews and Buy at NexTag - Price - Review
Nrg 00690C Small Size Solar Powered Battery Charger for NRG Batteries with 3-Pin X...
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Book-sized folding solar charger can help power some portable TVs, radios, lights and other appliances.
http://www.nextag.com/solar-cell-phone-charger/search-html   (166 words)

  
 Photovoltaic Solar Cells & Solar Panels
Photo cells use this effect to generate electricity that we can use for charging batteries and operating small electronic equipment.
manufactures PDA and PC Solar Chargers, Solar Battery Chargers, Solar Battery Extenders, Cellphone Solar Battery Chargers and small Solar Panels as well as providing CRYSTALLINE PHOTOVOLTAIC SOLAR CELLS, cut to size in small or large quantities for customers.
We also have solar kits for charging rechargeable radio batteries and cell phones
http://www.plastecs.com   (680 words)

  
 Solar Cell - Products for Solar Cell - Manufacturers,Exporters,Suppliers,Traders,Companies,Factories
We are to build a new automated first quality solar cells manufac
Plastic solar cell, Easy to carry, Different voltage and curren
Our LCD flashing cell phone accessory can last for 10 years, used
http://www.alibaba.com/productsearch/Solar_Cell.html   (640 words)

  
 Fuel Cell Car Kit - FREE SHIPPING
This fuel cell kit provides a playful introduction to one of the most significant technologies of the 21st Century.
During electrolysis, water is separated into hydrogen and oxygen and the resulting energy is stored as a gas.
Pour in the water and watch it separate into hydrogen and oxygen, forming a gas to power your vehicle across the floor.
http://www.discoverthis.com/fuelcelcaran.html   (309 words)

  
 Sunpower Systems, Inc. - Solar Cell Phone Batteries for Motorola, Nokia and Samsung.
Sunpower Systems, Inc. - Solar Cell Phone Batteries for Motorola, Nokia and Samsung.
http://www.snpower.com   (13 words)

  
 silicon solar cell - silicon solar cell - Nanjing CEEG Photovoltaic
Solar cell module is a kind of photovoltaic generation device, which directly converts the energy from the sunlight
Advanced technology of impurity gettering, surface auminium back surface field, which realizes high energy conversion efficiency of the cells.
Nanjing CEEG Photovoltaic engaged in Solar cell, solar energy, silicon solor module, sillicon solar cell, crystalline silicon solar cells.
http://silicon-solar-cell.bloghi.com   (159 words)

  
 Solar cells Ltd. - photovoltaic solar cell manufacturer
Microex solar cells are designed for a variety of applications including utillity interactive power systems,stand-alone generating systems and many small power generating applications.
Solar cells provide an attractive,maintenance-free method to generate electricity reliably.
Put the Power of the Sun to Work for You
http://www.solar-cells.net   (446 words)

  
 PHOTON TECHNOLOGIES: Solar Panels, Solar Powered Marine Beacons
ITF Flexible Mini-Solar Panels are the perfect way to "solarize" many existing battery powered products, or economically produce high volume rechargeable products without the need to radically increase labor staff for the production of delicate Crystalline Solar Cell panels.
They eliminate the need for damage-prone soldered connections of individual, delicate solar cells and are the world's most rollable, lightweight, and durable solar technology.
We have many years of Experience in the Design, Development and Production of Commercial, Industrial, Consumer and Military Products that either use Solar Panels for Direct or Battery Power, or may be adapted over to Solar Recharging.
http://www.photontek.com   (453 words)

  
 Evergreen Solar
Evergreen Solar is a developer and manufacturer of photovoltaic (PV) modules - the engines of solar electric systems - used in remote power and emerging grid-connected markets.
The PV modules produced by Evergreen Solar are distinctive in their appearance because they incorporate proprietary crystalline silicon technology known as String Ribbon.
Its manufacturing facilities contain state of the art equipment for crystal growth, cell processing, and module lamination.
http://www.evergreensolar.com   (295 words)

  
 Nanocrystalline Dye-Sensitized Solar Cell Kit from Sol Ideas Technology Development
We are working with the Swiss Federal Institute and several companies to develop and market this new solar cell technology.
The main purpose of the educational kit is to allow anyone, in any country, to explore the operating principles of the new type of cell.
These solar cell kits are based on work on nanocrystalline dye-sensitized solar cells that use an organic dye to absorb incoming light to produce excited electrons.
http://www.solideas.com/solrcell/cellkit.html   (682 words)

  
 Global Solar
Based on advanced NASA and Department of Energy Technologies, Global Solar's products are lightweight, portable, and rugged enabling new and innovative commercial consumer, military, and industrial applications.
To learn more about our unique products and integrated systems,
Global Solar Energy, Inc. manufactures the highest performance thin film solar cell products in the world.
http://www.globalsolar.com   (85 words)

  
 Solar Cell - Buying Leads for Solar Cell - Buyers, Importers, Wholesalers, Distributors
We would like to hear from manufacturers of
We would like to buy 5 and 6 inch
cells for a long term, including Good quality and the efficiency is higher than 14%.
http://importer.alibaba.com/buyeroffers/Solar_Cell.html   (556 words)

  
 Sol Ideas Technology Development
A tutorial text on solar cells from an optical and thermodynamic perspective
The resulting solar cell lasts about a month, so the kit is an educational tool, and not a practical PV module.
It is produced and distributed by the Institute for Chemical Education, ICE.
http://www.solideas.com   (281 words)

  
 Honda’s new business venture: solar power - Green Machines - MSNBC.com
The U.S. project uses solar power to get hydrogen from water, thereby powering vehicles that run on fuel cells.
Carmaker had been testing, even as way to produce hydrogen for fuel cells
Honda said its solar cells would be composed of non-silicon compound materials, consuming half as much energy and generating 50 percent less carbon dioxide during production when compared with conventional solar cells made from silicon.
http://www.msnbc.msn.com/id/10530747   (502 words)

  
 InformationWeek Energy Storage Nanocrystal Discovery Has Solar Cell Potential January 9, 2006
Scientists at Los Alamos National Laboratory have discovered a process that increases the potential for using nanocrystals as solar cell materials for producing higher electrical outputs than current solar cells.
Jan 9, 2006 12:19 PM Scientists at Los Alamos National Laboratory have discovered a process that increases the potential for using nanocrystals as solar cell materials for producing higher electrical outputs than current solar cells.
The findings herald the possibility of new photovoltaic technologies that make use of traditional solar cell materials such as cadmium telluride.
http://www.informationweek.com/news/showArticle.jhtml?articleID=175802865   (718 words)

  
 Solar Cell Sales - we distribute products from Southwest Windpower, Trace Engineering, BP Solar/Solarex, Siemens Solar, ...
WELCOME to Solar Cell Sales, your source for solar cell electric sytems.
We specialize in BP Solar In Home Solutions.
Solar Cell Sales - we distribute products from Southwest Windpower, Trace Engineering, BP Solar/Solarex, Siemens Solar, Specialty Concepts, Inc., RV Power Products, Heart Interface and more
http://www.solarcellsales.com   (118 words)

  
 Kyocera Products Kyocera Solar Energy
Home About Solar Products Technical Support Dealer Locator News Contact
Las Vegas, NV May 23 - 25, 2006
http://www.kyocerasolar.com   (18 words)

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