{"94341":{"#nid":"94341","#data":{"type":"event","title":"(1030) Prof.  Daniel Frisbie, Univ. of Minnesota","body":[{"value":"\u003Cp\u003EProf. Daniel Frisbie, University of Minnesota, Twin Cities\n\u003C\/p\u003E\n\u003Cp\u003EOrganic Thin Film Transistors: A Materials Science Perspective\n\u003C\/p\u003E\n\u003Cp\u003EIn the last 20 years substantial progress has been made in the development of \u0026#61552;-conjugated organic semiconductors as an alternative to amorphous silicon for low cost, thin film electronics. The attractive properties of organic semiconductors, including low temperature processability and reasonable charge carrier mobilities, have led to widespread efforts to incorporate these materials into functional circuitry. In the late 1990s, organic semiconductors achieved sufficiently high levels of performance in thin film transistors (TFTs) that printed circuit applications could be envisioned. Increasing charge mobilities in order to increase transistor switching speeds remains an important goal, but other figures of merit, such as threshold voltage stability, are becoming vitally important. Better knowledge of structure-property relationships for organic semiconductors and for organic semiconductor\/gate insulator interfaces will be important for further advancements in OTFTs.\n\u003C\/p\u003E\n\u003Cp\u003EThis talk will begin with an overview of OTFT operation and historical development. We will then describe our efforts to understand structure-property relationships in pentacene TFTs, which have become the benchmark devices in organic electronics. We will also discuss the synthesis of new organic semiconductor materials, organic semiconductor film growth, structure characterization by X-ray diffraction and atomic force microscopy, and device current-voltage characteristics. If time permits, we will discuss some recent work on the use of very high capacitance gate insulators to achieve low voltage TFT operation. A recurrent theme is the effect of structure at all length scales- including molecular structure, crystal packing, and film morphology- on critical OTFT figures of merit such as the charge mobility, the threshold voltage for conduction, and the on-to-off current ratio. \n\u003C\/p\u003E\n\u003Cp\u003EReferences\u003Cbr \/\u003E\n[1] H. Klauk, T.N. Jackson, Sol. State Technol 43, 63 (2000).\u003Cbr \/\u003E\n[2] C.R. Newman, C.D. Frisbie, D.d.S. Filho, J.L. Bredas, P. Ewbank, K.R. Mann, \u0022Introduction to Organic Thin Film Transistors\u0022, Chem. Mater. 16, 4436 (2004).\u003Cbr \/\u003E\n[3] Malliaras, G.G.; Friend, R.H. \u0022An Organic Electronics Primer\u0022, Physics Today, 58, 53 (2005).\u003Cbr \/\u003E\n[4] Zaumseil, J.; Sirringhaus, H. \u0022Electron and Ambipolar Transport in Organic Field Effect Transistors\u0022, Chem. Rev. 107, 1296 (2007).\n\u003C\/p\u003E\n\u003Cp\u003EFor more information contact \u003Ca href=\u0022mailto:jean-luc.bredas@chemistry.gatech.edu\u0022\u003EDr. Jean-Luc Br\u00e9das\u003C\/a\u003E (404-385-4986).\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Prof. Daniel Frisbie, University of Minnesota, Twin Cities\n\nOrganic Thin Film Transistors: A Materials Science Perspective","format":"limited_html"}],"field_summary_sentence":[{"value":"Prof. Daniel Frisbie, University of Minnesota"}],"uid":"27275","created_gmt":"2007-02-22 01:00:00","changed_gmt":"2016-10-08 01:57:32","author":"Shirley Tomes","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2007-10-30T16:00:00-04:00","event_time_end":"2007-10-30T17:00:00-04:00","event_time_end_last":"2007-10-30T17:00:00-04:00","gmt_time_start":"2007-10-30 20:00:00","gmt_time_end":"2007-10-30 21:00:00","gmt_time_end_last":"2007-10-30 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"related_links":[{"url":"http:\/\/www.chem.umn.edu\/directory\/faculty.lasso?serial=1594","title":"Prof. Daniel Frisbie, University of Minnesota"}],"groups":[{"id":"85951","name":"School of Chemistry and Biochemistry"}],"categories":[],"keywords":[{"id":"919","name":"Biochemistry"},{"id":"89","name":"chemistry"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EShirley Tomes\u003C\/strong\u003E\u003Cbr \/\u003EChemistry \u0026amp; Biochemistry\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=st81\u0022\u003EContact Shirley Tomes\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404-894-0591\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}