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Photovoltaic Cells

Who discovered Photovoltaic cells, how did they discover them, and how have they advanced over the past 30 years.
by

Patrick Schwabe

on 27 May 2010

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Transcript of Photovoltaic Cells

Photovoltaic Cells How It Works Sun hits the solar panels and the silicon inside
splits up into positive silicon ions and electrons.

If you put wires on the front and back of the
solar panel, the positive ions and the electrons
will separate.

That is enough time to go out of the cell, go
into another appliance, power it, and then
go through the back of the cell.

This energy is green because it is powered by the sun and is renewable. Who Discovered It A man by the name Edmund Becquerel discovered Photovoltaic cells while doing research. How It Was Discovered Edmund Becquerel discovered Photovoltaic cells when he was experimenting with an electrolytic cell made up of two metal electrodes. Solar Energy Timeline From Past 30 Years 1981-Paul MacCready builds the first solar-powered aircraft — the Solar Challenger — and flies it from France to England across the English Channel.

1985-Researchers at the University of South Wales break the 20% efficiency barrier for silicon solar cells.

1992-Researchers at the University of South Florida develop a 15.9% efficient thin-film photovoltaic cell made of cadmium telluride, breaking the 15% barrier for this technology.

1996-The world's most advanced solar-powered airplane, the Icare, flies over Germany. Its wings and tail surfaces are covered by 3,000 super-efficient solar cells, for a total area of 21 square meters.

2002-NASA conducts two successful tests of a solar-powered, remote-controlled aircraft called Pathfinder Plus. In July, researchers demonstrate the aircraft's use as a high-altitude platform for telecommunications technologies. In September, it's tested for use as an aerial imaging system for coffee growers.

2007- New World Record Achieved in Solar Cell Technology – 42.8% efficiency achieved by University of Delaware.



Web Resources http://www1.eere.energy.gov/solar/solar_time_2000.html
http://www.energy.gov/index.htm
http://science.nasa.gov/science-news/science-at-nasa/2002/solarcells/
http://www.eia.doe.gov/cneaf/solar.renewables/page/solarphotv/solarpv.html
http://www.solarbuzz.com/applications.htm
Edmund Becquerel The Solar Challenger Pathfinder Plus By: Patrick Schwabe How Photovoltaic Cells Are Used Today Emily like penis dfgsdfg dfgdfg gg Companies use solar technology when they are in remote areas. Those solar panels power small appliances such as: microwaves, TVs, radios, telemetry and radio telephones.

Some people do the same thing with their houses. Since they use solar energy to power small appliances and lights, their electric bill is much smaller than a house that relies entirely on the electric company. Chemical Equation There is no actual Chemical
equation for Photovoltaic Cells

Phos=Light
Voltaic=Electricity

Photon+Silicon=Energy
(Closest you can get to an equation)

Considering this, the equation is always balanced

Equations must be balanced because of the law of conservation
of matter. The elements in the reactions cannot
just go away or come from no where. For something to be
equal, they must be the same. Research Questions Who discovered Photovoltaic Cells?
How were they discovered?
How have they advanced over the past 30 years?
Full transcript