update 2 april 2, 2010 jesus guardado, leah nation, huy nguyen, tina ro
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![Page 1: Update 2 April 2, 2010 JESUS GUARDADO, LEAH NATION, HUY NGUYEN, TINA RO](https://reader035.vdocuments.site/reader035/viewer/2022062714/56649d595503460f94a39890/html5/thumbnails/1.jpg)
Update 2April 2, 2010
JESUS GUARDADO, LEAH NATION, HUY NGUYEN, TINA RO
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Agenda
• Project Background • Fabrication
• Testing
• Project Changes
• Schedule
Flexible Cell
http://www.worldofrenewables.com
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Project Background
Polymeric Photovoltaic Cells
o Low fabrication costso Fast processing speed o Light weighto Flexible
Carbon Nanotubes
o Aid transfer of electronso Prevents charge recombinationo Improves Voc, Jsco $8 per m2
SWeNT SG 65, from CoMoCAT
SWeNT SG 65, from CoMoCAT
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Fabrication & Testing Update
Assembled 10 samples:• Prepared solutions• Spin-coated onto substrates • Deposited electrode
Testing• Efficiency calculation via I-V curve • Optical absorption range via UV-vis
spectroscopy
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Testing
• UV-Viso verified CNT presenceo gauged absolute effect of CNTs in CNT/P3HT mix
• I-V Curve
o resistors, not diodes
Uv-vis w/ NIR in ISN lab
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Results: UV-Vis
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Results: I-V Curves
Sample Result Desired Diode Curve
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Analysis
Samples weren't diodes P3HT:CNT layer too thin TiO2 too conductive pattern transparent
scotch tape
Chloroform
evaporates too quickly nonuniform coats
Cell Pattern
ONE Lab
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Modifications
• FTO instead of ITO substrate availability
• 4 devices per glass slide
more devices to test precise tape placement
• separate CNT from P3HT
spin coat separately • P3HT solvent -> dichlorobenzene:
Higher boiling point 40mg/mL, before 10mg/mL
www.mse.edu
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Layer Separation
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Layer Separation
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Layer Separation
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Layer Separation
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Layer Separation
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New Cell Design
Original Cell New Cell
FTO - Fluoride Tin OxidePEDOT - Poly(3,4-ethylenedioxythiophene)P3HT - poly(3-hexylthiophene)
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Current Progress & Future Schedule