G6_semiconducting conjugated polymers_v03

G6_semiconducting - ExcitonQuenchingand Polymers Group6 MichaelBynum CarlaPaulo MichaelPostolowski IntroductionVideo Whatisa Conjugated

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Exciton Quenching and  Migration in Conjugated  Polymers Group 6 Michael Bynum Carla Paulo Michael Postolowski
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Introduction Video
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What is a  Conjugated  Polymer? polymer with an  extended  -orbital  π system that  delocalizes the  electrons across the  molecule Sp2 + pz carbons http://www.lbl.gov/Science-Articles/Archive/assets/ images/2002/Aug-14-2002/MgB2_pi_bonds.jpg http://cnx.org/content/m25670/latest/ http://www.lbl.gov/Science-Articles/Archive/assets/ images/2002/Aug-14-2002/MgB2_pi_bonds.jpg Graphite Structure Graphite Polyacetylene
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Basic Knowledge Electricity electrons - tiny  particles with a  negative charge stream of electrons  flowing from one  point to another Conduction describes a material's  ability to transport  electricity metals are good  conductors glasses are poor  conductors or  insulators http://www.qrg.northwestern.edu/pr ojects/vss/docs/media/Thermal/elect ricity-flow.gif Electrons Nucleus protons and neutrons Electron Enters One Electron flies to the next atom One Electron flies to the next atom Electrons fly on
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Semiconductors materials with a  magnitude of  conductivity between  conductors and  insulators can very easily control  how current passes  through them Used in transistor,  diodes, solar cells, etc. http://www.homemadeenergyreview.com/blog/wp- content/uploads/2010/09/photovoltaic-solar-panel- system.png Load Sunlight P-type silicon Junction n-type silicon Electron flow Photons Hole Flow
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Basic Atomic Structure all matter is made up  of atoms  atom consist of  protons, neutrons and  electrons.  protons have a  positive charge electrons are  negatively charged http://genesismission.jpl.nasa.gov/science/mod 2_aei/fig2.gif Proton Neutron electron 9.109 x 10-31 kg 1.675 x 10-27 kg 1.672 x 10-27 kg
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Basic Atomic Structure protons and neutrons  are the center  (nucleus) of the atom electrons orbit around  this center atomic number equals  the number of protons  in the atom the number of protons  http://apchemcyhs.wikispaces.com/file/view/ato m_structure1.jpg/36725531/atom_structure1.jpg Nucleus High speed electrons (- charge) Protons (+ charge) Neutrons (no charge)
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Shells and Energy Levels electrons always strive  to be energy efficient it will try to keep its  energy speed as low  as possible each atom has a fixed  number of electrons these electrons are  divided into shells  http://www.anus.com/zine/articles/alexis/hy permaterialism/atom_structure.jpg Third energy- level (shell) Second energy-level (shell) First energy- level (shell)
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Shells and Energy Levels valence shell is the  highest shell occupied  with electrons electrons in the  valence shell are  called valence  electrons valence shell are not 
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This note was uploaded on 12/06/2011 for the course PHIL 482 taught by Professor Harris during the Fall '02 term at Texas A&M.

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G6_semiconducting - ExcitonQuenchingand Polymers Group6 MichaelBynum CarlaPaulo MichaelPostolowski IntroductionVideo Whatisa Conjugated

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