Solar Cells

Only available on StudyMode
  • Download(s) : 25
  • Published : December 4, 2012
Open Document
Text Preview
SOLAR CELLLS-THE FOUNDTION OF SOLAR ENERGY full report
| |ABSTRACT | |
| |A solar cell is a semiconductor device | |
| |that converts solar energy into | |
| |electricity by the photovoltaic effect, | |
| |representing the fundamental power | |
| |conversion unit of a photovoltaic system| |
| |,works under the principle of a P-N | |
| |junction that absorbs light , releases | |
| |electrons and holes , creating a voltage| |
| |in the cell , which is then applied to | |
| |load; being environmentally aware, and | |
| |with the price of living rising at an | |
| |alarming rate, solar power, generating | |
| |energy from the natural resources of the| |
| |sun, has in recent times become quite a | |
| |viable alternative to the normal | |
| |resources for generating electricity, | |
| |with a great advantage that solar energy| |
| |is free; it needs no fuel and produces | |
| |no waste or pollution, environmentally | |
| |friendly, so particularly useful in | |
| |situations where electrical power from | |
| |the grid is unavailable such as in | |
| |remote area power systems, | |
| |Earth-orbiting satellites and space | |
| |probes, remote radiotelephones and water| |
| |pumping applications, where its | |
| |applications stands alone, and exploit | |
| |with their special advantages ,giving | |
| |rebirth to the mankind. | |
| |INTRODUCTION | |
| |Solar cells represent the fundamental | |
| |power conversion unit of a photovoltaic | |
| |system. They are made from | |
| |semiconductors, and have much in common | |
| |with other solid-state electronic | |
| |devices, such as diodes, transistors and| |
| |integrated circuits. For practical | |
| |operation, solar cells are usually | |
| |assembled into modules. | |
| |Many different solar cells are now | |
| |available on the market, and yet more | |
| |are under development. The range of | |
| |solar cells spans different materials | |
| |and different structures in the quest to| |
| |extract maximum the device while keeping| |
| |the cost to a minimum. | |
| |Cheaper (but also less efficient) types | |
| |of silicon cells, made in the form of | |
| |amorphous thin films, are used to power | |
| |a variety of consumer products. We were | |
| |familiar with the solar-powered watches | |
| |and calculators, but larger amorphous | |
| |silicon solar modules are also | |
| |available. | |
| |A particular class of high-efficiency | |
| |solar cells from single crystal silicon | |
| |or compound semiconductors (for example,| |
| |gallium arsenide or indium phosphide) | |
| |are used in specialized applications, | |
| |for example, to power satellites or in | |
| |systems which operate under | |
| |high-intensity concentrated sunlight. | |
| |WHAT IS A SOLAR CELL | |
| |A solar cell or photovoltaic cell is a | |
| |semiconductor device that converts solar| |
| |energy into electricity by the | |
| |photovoltaic effect.. Photovoltaicâ„¢s | |
| |is the field of technology and research | |
| |related to the application of solar | |
| |cells as energy. Sometimes the term | |
| |solar cell is reserved for devices | |
| |intended specifically to capture energy | |
| |from sunlight, while the term | |
| |photovoltaic cell is used when the | |
| |source is unspecified. | |
| |SOLAR CELL | |
| |WHAT IS THE PRINCIPLE OF A SOLAR CELL | |
| |It is based on the ability of a | |
| |semiconductor to directly convert | |
| |sunlight into electricity. Basically, a | |
| |solar cell is a P-N junction that | |
|...
tracking img