Home page -> Renewable Energy basics -> Photoelectricity
pages in this folder
Photoelectricity Irradiation Photovoltaic effect Photovoltaic modules Photovoltaic cells PV Longevity & Degradation	Photovoltaic systems Solar Charge controller Orientation Tilt Angle Batteries Inverters

Эта страница на русском | Printable version

Photovoltaic effect

For solar electricity you need a solar panel that consists of one or more solar cells. When sunlight falls onto a solar cell, the solar cell material absorbs some of the light particles (so called photons). Each photon contains a small amount of energy. When a photon is absorbed it starts a process of freeing an electron in the material of the solar cell. Because both sides of a solar cell are electrically connected with a wire, a current will flow when the photon is absorbed. The solar cell now produces electricity, which can be used instantly or stored in a battery.

The principle of solar electricity.

1. light (photons) 2. front contact 3. negative layer 4. diversion layer 5. positive layer 6. back contact

As long as the solar cells are exposed to light this process of creating free electrons continues and electricity is produced. Materials that possess this photovoltaic effect are some semiconductors. In a special production process solar cells are made out of this semiconductor material.

A solar panel can produce clean electricity for 20 years or more. Wear is mainly due to exposure to the environment. A well-mounted solar panel will be a reliable, silent and clean source of energy for many years.

Information from http://www.mysolar.com and other sources were used, hardly edited by our engineers.

:: menu

:: Search

:: TEXT_ICQ

379315905

:: banners

Текущие посетители