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CEAS REU Project 4

Synthesis of Solar Cell Materials, and Fabrication of Novel Polymer-Based Solar Cells. CEAS REU Project 4. Nathan Duderstadt , Chemical Engineering, University of Cincinnati Stoney Sutton, Electrical Engineering, University of Cincinnati Kate Yoshino, Engineering Physics, Taylor University

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CEAS REU Project 4

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  1. Synthesis of Solar Cell Materials, and Fabrication of Novel Polymer-Based Solar Cells CEAS REU Project 4 Nathan Duderstadt, Chemical Engineering, University of Cincinnati Stoney Sutton, Electrical Engineering, University of Cincinnati Kate Yoshino, Engineering Physics, Taylor University Dr. VikramKuppa and Ms. Yan Jin

  2. Introduction Why solar cells? Why ORGANIC solar cells? What is graphene and what role does it play?

  3. Background Literature Review Solar Radiation Charge Generation In a semiconductor, the energy from the sun both moves the electron to an excited state, but also creates a hole (positive charge) in its place. Charge Transport to Electrodes Electric Current Lowest Unoccupied Molecular Orbital Highest Occupied Molecular Orbital e h Animation and concepts adapted from Dr. VikramKuppa’s presentation on organic photovoltaics

  4. Organic Photovoltaic Devices • The problem with semiconductors in solar cell applications is separating these particles and TRANSFERING them to their electrodes. • In order to accomplish this, we use two material, like seen to the right. Picture from: Deibel, Carsten, and Vladimir Dyakonov. (2010). " Polymer–fullerene Bulk HeterojunctionSolar Cells.." Vol. 73.9, pp. 1-39.

  5. Cell Structure Aluminum (Cathode) Lithium Fluoride Active Layer (P3HT:F8BT:Graphene) PEDOT:PSS Indium Tin Oxide (Anode) Glass Slide The thickness of the cell is approximately without the glass slide is approximately 500 nm in thickness.

  6. Cell Structure Solar Cell Active layer Indium Tin Oxide (Anode) Aluminum (Cathode) Glass Slide

  7. Project Goal Project Objectives • Learn the basics of Organic Photovoltaic (OPV) research • Gain expertise in making and characterizing OPV cells • Understand methods of fabricating graphene from graphite • Incorporate graphene in OPV cells • Differentiate between processing techniques and their influence on the solar cell • Evaluate graphene content on cell performance Determine how graphene makes solar cells more efficient

  8. Tasks Learn methods for making graphene solutions and fabricating solar cell devices Prepare and analyze graphene solutions for use in solar cell polymers Fabricate solar cell devices and perform thermal treatment Characterize the cell through various testing Conduct morphology and conductivity studies on the polymer films with different graphene concentrations Report writing and presentations

  9. Timeline Week Task

  10. Research Training Received Making Graphene Solutions Blending P3HT and Graphene Lab Safety Training UV Spectrophotometer

  11. Research Training Received Performance Testing Transmission Electron Microscope Spin Coating Procedure Atomic Force Microscope

  12. Progress Made Training is mostly complete! Created first set of cells (during training) Tested first set of cells Currently processing data Started beginning processes of creating second batch with varying concentrations

  13. Questions?

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