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Structure-Function Relationships in Organic Field Effect Transistors

Structure-Function Relationships in Organic Field Effect Transistors. Kirsten Parratt Summer 2011 Loo Group. Why Organic Semiconductors?. What are Organic Semiconductors? What advantages do they offer?. An alternative to inorganic electronics: Easier manufacturing

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Structure-Function Relationships in Organic Field Effect Transistors

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  1. Structure-Function Relationships in Organic Field Effect Transistors Kirsten Parratt Summer 2011 Loo Group

  2. Why Organic Semiconductors? What are Organic Semiconductors? What advantages do they offer? • An alternative to inorganic electronics: • Easier manufacturing • Low temperature processing • Solution processing • Lower costs • Flexible substrates Image:shttp://www.konarka.com/index.php/power-plastic/about-power-plastic/ http://www.physorg.com/news/2011-02-carbon-nanotube-transistors-inexpensive-flexible.html

  3. How it works-Physical Gold Contacts Active Layer Silicon Oxide Silicon

  4. Devices TesADT • Processing Steps: • Weigh out compounds • Dissolve in solution • Clean SiO2 wafer • Spincast/dropcast onto substrate • Evaporate gold contacts Cl-TesADT

  5. Device Results

  6. AFM 50 mol% 100 mol% 62.5 mol% 0 mol%

  7. DSC

  8. Eutectic Grain Boundaries

  9. Conclusion • At 62.5% ClTesADT and 37.5%TesADT, a eutectic point forms • This eutectic point has the highest intermixing and therefore the greatest grain connectivity • As a result, OFETs with this molecular structure have higher hole mobility and function better • Future work could involve other TesADT derivatives

  10. Acknowledgements • Professor Loo • Stephanie Lee • Loo Lab Group • Princeton Environmental Institute

  11. GIXD 37.5mol% 50mol% 12.5mol% 87.5mol% 100mol% 62.5mol%

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