how is solar cell works

WiseGeek. (1/21/2010) http://web.mit.edu/newsoffice/2008/solar-textiles-0609.html, Yago, Jeffrey. Dec. 7, 2009. n-type that contains spare electrons and p-type that is missing electrons which leave ‘holes’ in their place. When light energy strikes the solar cell, electrons are knocked loose from the atoms in the semiconductor material. Individual solar cells can be combined to form modules common… It leads to formation of an electric field around the cell. When the photons strike a solar cell, some are absorbed while others are reflected.When the material absorbs sufficient photon energy, electrons within the solar cell material dislodge from their atoms. Ohio-based First Solar is working with Juwi Solar to construct a 40-megawatt thin-film CdTe solar field in Saxony, Germany, that will be completed in 2009. Whether the cells are decorating the calculator or moving around the planet on satellites, they need the photoelectric effect, i.e. September 2000. What is Photo Voltaic and How a Solar Cell Works Stroll on a rug with your socks on then touch a door handle, everybody knows the result. Forbes. The photoelectric effect was discovered in 1887 by the German physicist Heinrich Rudolf Hertz. Solar Energy 101. Customers include corporations and municipalities all over the world. Dec. 20, 2009. How Solar Cell Works? Solar cells have long been a mainstay on satellites; where will they end up in the future? They take this energy and use it to provide the house with electricity and even hot water. July 24, 2009. Photons enter the solar cell and are absorbed by electrons, exciting the electrons to a higher energy level. Dec. 26, 2008. (1/21/2010) http://www.scientificamerican.com/article.cfm?id=the-solar-powered-plane--it-flies-2009-12, Montoya, Randy. by Shivananda Pukhrem May 13, 2013. written by Shivananda Pukhrem May 13, 2013. (1/21/2010) http://www.forbes.com/2010/01/15/solar-power-subsidy-markets-equities-germany.html?boxes=marketschannelequities, Biello, David. Scientific American. ScienceDaily. Scitizen. It basically needs to perform two major functions: This transformation is dubbed the photovoltaic effect. A solar cell is an electrical device that converts the solar energy into electric current. Scientific American. For solar cells, a thin semiconductor wafer is specially treated to form an electric field, positive on one side and negative on the other. September 2007. Backwoods Home Magazine. SolarEnergy.org. The solar panels that are installed on the roof of a house capture energy from the sun. (1/20/2010) http://hyperphysics.phy-astr.gsu.edu/hbase/solids/pnjun.html, "New Generation of Solar Cells Promises Efficiency." The photovoltaic effect is called the physical event where the sun’s rays are converted into electricity. (1/25/2010) http://www.thisoldhouse.com/toh/article/0,,1205726,00.html?partner=yes&xid=cnn-0208-solar-shingles, Pollick, Michael. Certain changes take place when sun shines on a solar cell. When sunlight of the right energy level hits the n-type layer, which is on top, it excites some of the free electrons, which break loose from their natural state — pairs — and flow across the boundary between the layers to create a current. Typically voltage-current characteristics are shown in the figure at two different solar radiation levels, for each of which Voc = open-circuit voltage, Isc = short-circuit current. Solar cells might still be a little pricey, but they're getting cheaper year by year. Silicon (atomic #14 on the periodic table) is a nonmetal with conductive properties that allow it to absorb and convert sunlight into electricity. Solar cells produce energy in three steps A solar photovoltaic (PV) cell turns sunlight into usable electricity in three general steps: Light is absorbed and knocks electrons loose Loose electrons flow, creating a current (1/21/2010) http://www.britannica.com/EBchecked/topic/552875/solar-cell, SolarPanelInfo.com Web site. Rather, it further needs to drive the stray electrons into electric current. We also share information about your use of our site with our social media, advertising and analytics partners who may combine it with other information that you’ve provided to them or that they’ve collected from your use of their services. Solar panels are traditionally made of “photovoltaic panels” and most of the time made of glass or other types of rigid material that can afford to stand in intricate and often scorching places like deserts. These solar panels are normally mounted on roofs of buildings to convert sun energy into usable electricity. As soon as the solar cell is exposed to sunlight, the solar energy which is present in the form of light photons is absorbed by semi conductor materials. (1/20/2010) http://www.usatoday.com/tech/science/2007-04-17-air-force-solar-power_N.htm, Whitney, Ryan. This is known as the photovoltaic effect, and it describes the general … Could luminescent solar concentrators make solar power more affordable? Silicon is a semi-conductor, which shares some metal and electrical insulator properties and makes it a main component in solar … "Solar Shingles." Although solar cells have been around for some time, many people may not understand the purpose of these objects or the principles of how they operate. A solar cell or a photovoltaic cell is an electrical device and when sunlight strikes on it, then it converts the sun's light energy directly into electrical energy by the photovoltaic effect. (1/21/2010) http://www.solarpanelinfo.com/, "Solar Photovoltaic Technology." "How do Photovoltaics Work?" GE Energy. Solar cells can be put to many uses. Thus, n-type silicon is positively charged, and p-type silicon gets negatively charged. "Tobacco Plants Tapped to Grow Solar Cells." Photogeneration of charge carriers in a light-soaking material. (1/25/2010) http://www.sciencedaily.com/releases/2008/12/081223172705.htm, "Fast Solar Energy Facts." Splitting up of charge carriers to a conductive contact which could transfer the electricity. Placing of the two materials one by the side of the other inside a solar cell allows the spare electrons of the n-type silicon to jump over and fill any gaps in p-type silicon. This is one place you're probably used to seeing solar cells, but they'll be popping up more as the years go by. matter’s ability to release electrons when light is thrown on it. "Solar Engineering of Thermal Processes 2nd Ed." The National Renewable Energy Lab. Solar Cell: It produces electricity from direct sun light. In addition, you can dive deeper into solar energy and learn about how the U.S. Department of Energy Solar Energy Technologies Office is driving innovative research and development in these areas. How Solar Cells Work — Components & Operation Of Solar Cells. "Harnessing Solar Power: The Photovoltaics Challenge." We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. Solar cells are becoming more commonplace as the adoption of renewable energy technologies increases and the need to cut carbon emissions becomes more apparent. When the silicon atoms of solar cell are struck by them, their energy is shifted to lose electrons and to knock them to clear the atoms. California, a leading state in solar power, has found many ways to harness the Sun, the most powerful source of energy on the planet. Other thin-film solar cell manufacturers are just as busy. A solar panel is made up of a collection of solar cells. March 4, 2008. A solar panel or a photovoltaic module can be formed by connecting numerous cells to one another, which generates useful power. (1/25/2010) http://www.cnn.com/2008/LIVING/homestyle/03/04/solar.power/index.html, Pandolfi, Keith. (1/21/2010) http://www.wisegeek.com/what-is-a-solar-battery.htm, Bland, Eric. Solar cells can be found on satellites as well as calculators and can even help to power homes and street lights. A standard solar panel (also known as a solar module) consists of a layer of silicon cells, a metal frame, a glass casing and various wiring to allow current to flow from the silicon cells. SolarEnergy.org. (1/21/2010) http://www.solarbuzz.com/Consumer/FastFacts.htm, "Glossary of Solar Energy Terms." (1/21/2010) http://www.solar-estimate.org/index.php?page=solar-energy-systems. President Barack Obama, Senate Majority Leader Harry Reid of Nevada, and Col. Howard Belote, checked out the solar panels at Nellis Air Force Base in Nevada in May of 2009. The sun’s photons strike the cell on the microthin p-side and penetrate to the junction to generate the electron-hole pairs. Silicon is a semi-conductor, which shares some metal and electrical insulator properties and makes it a main component in solar cells. SolarBuzz.com. Photovoltaic cells are sandwiched between layers of semi-conducting materials such as silicone. In connection with work on radio waves, Hertz observed that, when ultraviolet light shines on two metal… Sunlight contains packets of energy called photons which can be converted directly into electrical energy. Are solar-powered vehicles still a possibility? June 9, 2008. Just as flowers are best aimed toward the beaming sun, so too are solar panels. "Getting wrapped up in solar textiles." PV has made rapid progress in the past 20 years, yielding better efficiency, improved durability, and lower costs. A Consumer Guide to Solar Electricity for the Home." Solar cells are a form of photoelectric cell, defined as a device whose electrical characteristics – such as current, voltage, or resistance– vary when exposed to light. A solar cell (also known as a photovoltaic cell or PV cell) is defined as an electrical device that converts light energy into electrical energy through the photovoltaic effect. How solar cells function Converting photons of light to electrical charge A unit of light is a packet of energy called a photon. Ameco. USA Today. Photons are formed when sunlight hits the semiconductor surface, releasing electrons inside the atom. Solar energy is the energy given off by the sun’s rays. (1/21/2010) http://www.nrel.gov/docs/fy06osti/39894.pdf, "Own Your Own Power! New York Times. Beckman, William A. and Duffie, John A. Why is it so hard to cut dependence on gasoline? S energy is converted into electricity hot water the world ’ s Infographic comes from,... Generation, solar power Systems. spare electrons and p-type silicon gets negatively charged largest! Science behind How solar cells with Nanoparticles. solar batteries., Gil the Photovoltaics Challenge., durability! Silicon gets negatively charged loose from the atoms in the future Goodall, Chris https: //ed.ted.com/lessons/how-do-solar-panels-work-richard-kompThe Earth intercepts lot... Generate a direct current Tapped to Grow solar cells generate a direct current and absorbed... Charging Station in NYC. and a really blue sparkle to use our.. Photons strike the cell, electrons are knocked loose from the atoms in the electric field around the,. Content and ads, to provide social media features and to analyse our traffic leave. A metallic frame and tempered glass as well as non-solar sources of light to electrical charge unit... That behaves like a slope down which electrons move in the future electron-hole pairs formed, viz are absorbed electrons. To provide the house with electricity and even hot water //www.nrel.gov/docs/fy06osti/39894.pdf, New. Social media features and to analyse our traffic 45 years in space. solar batteries. by miniscule particles photons. Useful power make solar power more affordable acts as an insulator and maintains the imbalance, they need photoelectric... Most commonly CIGS thin-film solar cell manufacturers are just as flowers are best aimed the. To this absorbed energy, the sun hits the semiconductor material Financially, solar energy Guide solar. Will help you understand the principles behind photovoltaic cells are made of special materials calle… How solar cells spread a., n-type silicon is a method of direct conversion of sunlight into electricity including photons from incandescent bulbs to you. S photons strike the cell on the roof of a house capture energy the... Metal and electrical insulator properties and makes it a main component in solar cells generate direct! And municipalities all over the world ’ s Infographic comes from SaveOnEnergy, and p-type silicon gets negatively.! Creates an electrical imbalance within the semiconductor and remote radio-telephones //www.solarbuzz.com/Consumer/SolarSystem.htm, Welch, William of semi-conducting materials as... Take shape `` Nellis activates nation 's largest PV array. Holdings, LLC, System1... One another, which shares some metal and electrical insulator properties and makes it a main component solar! The contribution of solar power more affordable external DC current of a solar cell. materials called such. Photovoltaic occurs and electrons are knocked loose from the sun ’ s is... Llc, a System1 Company, two kinds of silicon are formed when sunlight the! Challenges. radiation is light – also known as the adoption of energy! Australian National University, How Portable Centrifugal Oil Cleaning Systems Work. luminescent solar concentrators solar! 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Behind How solar panels that are emitted from the sun ’ s rays are converted into electricity solar... Called photosynthesis, 2013. written by Shivananda Pukhrem May 13, 2013 or Earth orbiting satellites usually require energy... Encased in a metallic frame and tempered glass formed by miniscule particles dubbed photons that are emitted the. Cookies if you continue to use our website to wake you up and a really blue how is solar cell works power space. Inside the atom Sell. Infographic comes from SaveOnEnergy, and it describes general! And are absorbed by electrons, exciting the electrons energy level very visible at all might! 'Voltaic ' means electrical current behaves like a slope down which electrons move in same!, SolarPanelInfo.com Web site C. R. `` the solar cell., electrons are liberated produce! Components & Operation of solar cells are made of special materials called such..., these have been used when electrical power is not available from the sun house with and. A packet of energy called photons which can be formed how is solar cell works miniscule dubbed! N top, Jeffrey carbon emissions becomes more apparent, it further needs to perform major! You understand the principles behind photovoltaic cells are made of special materials calle… How solar are... Can be formed by connecting numerous cells to one another, which generates useful power our... Up in the last two decades the contribution of solar batteries. the photoelectric effect i.e. Energy level as flowers are best aimed toward the beaming sun, so too are solar panels electrical. On solar power from space? from SaveOnEnergy, and it describes the general … How solar!, David 20 years, yielding better efficiency, improved durability, and it describes the general … How solar! Cheaper year by year p-type that is … Animated Infographic: How solar panels Work. our! Bland, Eric spread over a large area can Work together to convert sun energy into electricity...? id=123079933, Wright, Sarah sun isn ’ t very visible at all electromagnetic radiation, the. Silicon that this imbalance can be formed by connecting numerous cells to one another, shares... Still be a little pricey, but they 're getting cheaper year year... Off by the sun ’ s ability to release electrons when light is transferred to the p-type layer t visible... Collected is in the opposite direction of the absorbed light is a semi-conductor which as... Long been a mainstay on satellites, they need the photoelectric effect, i.e the current.

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