domestic photovoltaic panels
One of the most popular solar panels are the photovoltaic solar panels. Photovoltaic solar panels create electricity by using what is called the photovoltaic effect. This effect occurs when specific materials spur electrical currents when they get exposed to the protons contained in sunlight.
A photovoltaic solar panel is basically a very large series of semiconductor PN junctions. Half of each the junctions are electron deficient, while the other half is rich in electrons. The purpose of the photovoltaic cell is to produce an electric field over the junction between the two halves of the crystal, and to allow electrons to spread from the electron-rich half to the energy deficient side. A potential barrier is between the p and n-type sides of the crystal which prevents any more electrons from moving through the junction until the solar cell is exposed to sunlight, and frees electrons that have enough energy to break the barrier.
Most of us learned in high school that light from sun-rays is composed of packets of energy known as Photons. Each photon carries energy with an amount that is corresponding to the wavelength of the light it is contained in. When a photon hits the photovoltaic panel it causes 1 of 3 reactions. It can pass through the panel, it can get reflected, or it can be absorbed by the panel. When the photon is absorbed by the panel, its energy is captured by an electron in an atom of the solar cell, allowing it to escape from its normal positioning, flow through the junction and then fill a hole. The electrons then move through a load, allowing you to use it as energy, and complete the circuit by recombining with the holes that remain. The entire process allows you to use energy from the sunlight at an efficiency of around five to fifteen percent. This process can happen repeatedly over the entire lifetime of the solar cells.
If you’re tired of high electricity bills, discover how thousands of families worldwide benefit from homemade solar panels and wind turbines to power their homes.
For more information on how to build your own solar panels visit our Earth 4 Energy Review.
Underwater SOLAR PANELS 9% Stronger PV Photovoltaic Sun Power
|
|
Solar Power Your Home For Dummies
$8.47 Want to take advantage of solar power in your home? Whether you’re looking to save on your energy costs by adding a few solar components or you want to build a solar-powered house from the ground up, Solar Power For Dummies takes the mystery out of this energy source and shows you how to put it to work for you!This friendly, hands-on guide is packed with tips for making your home more energy-ef... |
|
|
21st Century Guide to Solar Power and Photovoltaics: Green Domestic Power from the Sun - Practical Information about Home Electricity, Water Heating, Panel and Cells, Solar Energy Financing
$9.99 This ebook provides comprehensive coverage of all aspects of solar energy and photovoltaic power, with practical advice and information on solar power systems for homes, farms, ranches, and businesses, along with extensive information about solar technologies and research. Topics covered include selecting residential rooftop electrical and water heating (solar thermal) systems and contractors, cos... |
|
|
21st Century Ultimate Solar Power and Photovoltaics Toolkit, Green Domestic Power from the Sun: Home Electricity and Heating, Solar Panels, Financing (Ringbound and DVD-ROM)
$32.95 This unique ringbound book and DVD-ROM set provides the ultimate toolkit about solar power and photovoltaics. The ringbound book provides a reproduction of several practical and extremely useful guides for consumers, including the Better Building Series, Basic Solar Electric System, Battery Power for Your Residential Solar Electric System, Connecting Your Solar Electric System to the Utility Grid,... |
One Response Leave a comment
Hands down, Apple’s app store wins by a mile. It’s a huge selection of all sorts of apps vs a rather sad selection of a handful for Zune. Microsoft has plans, especially in the realm of games, but I’m not sure I’d want to bet on the future if this aspect is important to you. The iPod is a much better choice in that case.