Difference between revisions of "Solar Cell Introduction"

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[[Main_Page#Organic Solar Cells|Return to OPV Menu]] | 
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[[Image:Organicphotovoltaic_assort_800.jpg|thumb|400px|A variety of organic photovoltaic test cells. The circles and stripes are the electrical contacts that have been deposited over the organic layer.]]
[http://depts.washington.edu/cmditr/media/Organic_Photovoltaics.html Organic Photovoltaics Concept Map]
An organic solar cell is an electricity generating device comprised of thin layers of conductors, and photoelectrically active organic compounds. This section was based on lectures presented by Jean Luc Bredas at Georgia Tech in 2007.


There are quite serious issues regarding the energy needs.  We are using an increasing number of joules and we need the proper resources to provide the energy needs. Organic photovoltaics are an import aspect.  We will look at the major processes in solar cells and overview of the organic solar solar cell.
=== Silicon Solar Cell ===


<swf width="50" height="50">http://depts.washington.edu/cmditr/media/opvanim.swf</swf>
 
In a conventional silicon solar cell two layers of silicon are doped so that one is electron rich (N layer) while one is electron poor (p or hole layer). When photons are absorbed near the junction the electron and holes separated and the electrons flow away from the cell towards the load. Finally the electron return through the circuit and recombine with the holes.
<swf width="500" height="400">images/0/0c/Solarcell.swf</swf>
 
 
=== Organic Solar Cells ===
 
[[Image:Organicphotovoltaic_assort_800.jpg|thumb|400px|A large OPV test cell built on glass substrate.]]
An organic solar cell is an electricity-generating device comprised of thin layers of conductors, and photoelectrically active organic compounds. This section is based on lectures presented by Professor Jean Luc Bredas at Georgia Tech in 2007, and by materials contributed from several other technical sources, including Department of Energy workshops on Solar Electric energy conversion. We will look at the major processes in solar cells and overview of the organic solar solar cell.
 
In organic solar cells light passes through the glass cover coated with transparent Indium Tin Oxide (ITO) and a [[PEDOT/PSS]] transport layer. A bulk heterojunction is made with polythiophene  and a C60 Fullerene derivative P3HT- PCBM and finally a bottom electrode made from aluminum. In the heterojunction photons are absorbed and charge is separated creating an electric current.
 
{{#ev:youtube|nUCMrCz-oxU}}
 
{{#ev:youtube|2BMr9CW92ic}}
 
<swf width="500" height="400">http://depts.washington.edu/cmditr/media/opvanim.swf</swf>
 
===Energy Consumption===
 
There are serious issues inherent with the energy needs of this country.  Even during slow economic growth we continue to use an ever-increasing amount of energy, and our energy consumption world-wide is projected to more than double by the middle of this century.  Organic photovoltaic devices are an important emerging technology, part of a broad spectrum of "Generation III" photovoltaics, which promise to provide solar-to-electric energy conversion in portable, light-weight packages, at extremely low cost.
 
 
 
[[category:organic solar cell]]
 
=== External Links ===
*[http://pvcdrom.pveducation.org/index.html PVCDROM - Basic Photovoltaics - from Arizona State University]
*[https://www.eeremultimedia.energy.gov/solar/ Solar Multimedia from DOE]
*[[wikipedia:Energy_in_the_United_States]]
*[http://cnx.org/content/m41217/latest/ An introduction to solar cell technology- Connexions]
 
*[http://www.jpl.nasa.gov/events/lectures/feb08.cfm Dr. Nate Lewis from CalTech provides some perspective on energy consumption and alternative energy conversion technologies on the horizon.]
*[http://www.sigmaaldrich.com/sigma-aldrich/areas-of-interest/materials-science/organic-electronics/plexcore-pv-ink-system/plexcore-pv-inks-video.html Plextronics printable OPV inks video]
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<td style="text-align: center; width: 33%">[[Main_Page#Organic Solar Cells|Return to OPV Menu]]</td>
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Latest revision as of 11:14, 25 March 2020

Previous Topic Return to Solar Basics Menu Next Topic

Organic Photovoltaics Concept Map

Silicon Solar Cell

In a conventional silicon solar cell two layers of silicon are doped so that one is electron rich (N layer) while one is electron poor (p or hole layer). When photons are absorbed near the junction the electron and holes separated and the electrons flow away from the cell towards the load. Finally the electron return through the circuit and recombine with the holes. <swf width="500" height="400">images/0/0c/Solarcell.swf</swf>


Organic Solar Cells

A large OPV test cell built on glass substrate.

An organic solar cell is an electricity-generating device comprised of thin layers of conductors, and photoelectrically active organic compounds. This section is based on lectures presented by Professor Jean Luc Bredas at Georgia Tech in 2007, and by materials contributed from several other technical sources, including Department of Energy workshops on Solar Electric energy conversion. We will look at the major processes in solar cells and overview of the organic solar solar cell.

In organic solar cells light passes through the glass cover coated with transparent Indium Tin Oxide (ITO) and a PEDOT/PSS transport layer. A bulk heterojunction is made with polythiophene and a C60 Fullerene derivative P3HT- PCBM and finally a bottom electrode made from aluminum. In the heterojunction photons are absorbed and charge is separated creating an electric current.

<swf width="500" height="400">http://depts.washington.edu/cmditr/media/opvanim.swf</swf>

Energy Consumption

There are serious issues inherent with the energy needs of this country. Even during slow economic growth we continue to use an ever-increasing amount of energy, and our energy consumption world-wide is projected to more than double by the middle of this century. Organic photovoltaic devices are an important emerging technology, part of a broad spectrum of "Generation III" photovoltaics, which promise to provide solar-to-electric energy conversion in portable, light-weight packages, at extremely low cost.

External Links

Return to OPV Menu Next Topic
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