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JESUS GUARDADO, LEAH NATION, HUY NGUYEN, TINA RO

JESUS GUARDADO, LEAH NATION, HUY NGUYEN, TINA RO. Polymer Photovoltaic Cells: Prototype Presentation April 15, 2010. Understanding the Market of Solar Energy. Our Focus: Polymer Photovoltaic Cells. Easily Fabricated Room T processing Printable More applications Light weight Flexible

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JESUS GUARDADO, LEAH NATION, HUY NGUYEN, TINA RO

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  1. JESUS GUARDADO, LEAH NATION, HUY NGUYEN, TINA RO Polymer Photovoltaic Cells: Prototype Presentation April 15, 2010

  2. Understanding the Market of Solar Energy

  3. Our Focus: Polymer Photovoltaic Cells Easily Fabricated Room T processing Printable More applications Light weight Flexible Current disadvantages Less stable Lower efficiency

  4. SWCNT at 80,000x • Objective: • Improve the efficiency of PVC to increase competitiveness and allow for niche application use • Carbon Nanotubes • High e- affinity • Improve carrier transport • Improves performance • Cost: $8 per m2 Our Design & Objective: sw-CNTs

  5. How It Works: • Layers are spin-coated • Cell: • Active layer • Charge acceptors • Electrodes

  6. How It Works: • Photons => Exitons • Carbon Nanotubes: • Charge transport • Prevents recombination

  7. How It Works: Electron => TiO2 Hole => PEDOT

  8. How It Works: Electrodes accept charges

  9. Procedure Description Assembly Prepare solutions and centrifuge Spin coat substrate samples Electrode deposition Testing Efficiency calculation via I-V curve Optical absorption range of PPCs via UV Vis spectroscopy Characterization Nanostructure via AFM, TEM, SEM

  10. Samples Blends: • Control (0% CNT) • Sample 1 (6% CNT) •  Sample 2 (3.75% CNT) Layers (show picture): • FTO • PEDOT • P3HT/CNTs • TiO2 • Ag FTO - Fluoride Tin Oxide PEDOT - Poly(3,4-ethylenedioxythiophene) P3HT - poly(3-hexylthiophene)

  11. Our Design: The Cell

  12. Our Design: The Cell

  13. Our Design: The Cell

  14. Our Design: The Cell

  15. Our Design: The Cell

  16. Modifications Before: • Spin coat at 2000 rpm • 1 mg P3HT/mL chloroform • Probe testing in dark box • 0.0121cm2 area devices • 10 device/slide • After: • Spin coat at 1000 rpm • 4 mg P3HT/mL dichlorobenzene • Probe testing in air • 0.4cm2 area devices • 4 devices/ slide

  17. FTO instead of ITO substrate availability  4 devices per glass slide need precise tape placement P3HT solvent -> dichlorobenzene: lower volatility Considerations behind our Modifications

  18. UV-Vis Results: Round II

  19. UV-Vis Results: Round II

  20. Testing Results: Round II Sample 4 Concentration 1 Sample 6 Concentration 2

  21. Next Steps • 40 mg P3HT/mL dichlorobenzene • ITO patterned slides • Pattern  no tape • ITO better light absorption range • Spin coat P3HT layer 2x • Thicker • Less likely to short-circuit • Won't trap electrons and holes • Spin coat solvent layer before P3HT/sw-CNT layer • Increase solubility

  22. Current Progress & Future Schedule

  23. Thank you. Questions?You may reach us at nanosol@mit.eduhttp://web.mit.edu/course/3/3.042/team1_10

  24. Appendix

  25. Renewable Energy Comparison

  26. Cost Estimation $/gram mg/mL L/slide slides/meter $/meter 100 0.1875 0.0001 4444.44 8.33 PRODUCTION COSTS, to be added to other company's approximation of $/meter CNT $ 15-20% cnts

  27. Team's Resources Expertise: Helen Zeng; MIT Research Laboratory of Electronics Research Scientist  Yin-lin Xie; MIT Materials Science and Engineering Technical Instructor   Jill Rowehl; MIT Materials Science and Engineering Doctoral Candidate Laboratories: Institute of Soldier Nanotechnologies (ISN) Organic Nanostructure Electronics (ONE) Lab

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