{"526261":{"#nid":"526261","#data":{"type":"event","title":"Ph.D. Dissertation Defense - Sangmoo Choi","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETitle\u003C\/strong\u003E\u003Cem\u003E:\u0026nbsp; \u003C\/em\u003E\u003Cem\u003EHigh Performance Organic Field-effect Transistors and Circuits for 3D-shape Substrates and Applications\u003C\/em\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EDr. Bernard Kippelen, ECE, Chair , Advisor\u003C\/p\u003E\u003Cp\u003EDr. Muhannad Bakir, ECE\u003C\/p\u003E\u003Cp\u003EDr. Elsa Reichmans, ChBE\u003C\/p\u003E\u003Cp\u003EDr. Farrokh Ayazi, ECE\u003C\/p\u003E\u003Cp\u003EDr. Jeffrey Davis, ECE\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EAbstract:\u0026nbsp;\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EIn this dissertation, the device structure and fabrication of high-performance top-gate organic field-effect transistors (OFETs) comprising a TIPS-pentacene\/PTAA film as an active layer and a CYTOP\/metal-oxide bilayer as a gate dielectric layer developed previously by members of our group have been adopted and further improved. Particularly, the top-gate OFETs have been fabricated on a shape-memory polymer substrate demonstrating the potential of the device being used for 3D-shape applications, such as wearable electronics. In detail, the performance of the top-gate OFETs has been improved by significantly lowering the contact resistance of the OFETs at the metal-semiconductor interface by developing a contact-doping method, which inserts a thin layer of dopants on source\/drain electrodes before the solution processing of an organic semiconductor layer. The OFETs having low contact resistance have been used as a backplane of OFET circuits combined with a newly developed patterning method of a CYTOP\/metal-oxide gate dielectric layer, by reverse stamping. Finally, high performance top-gate OFET circuits on a shape-memory polymer substrate have been developed and demonstrated based on this dissertation work.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"ECE PhD Dissertation Defense"}],"uid":"28475","created_gmt":"2016-04-18 14:31:09","changed_gmt":"2016-10-08 02:17:33","author":"Daniela Staiculescu","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-04-27T11:00:00-04:00","event_time_end":"2016-04-27T11:00:00-04:00","event_time_end_last":"2016-04-27T11:00:00-04:00","gmt_time_start":"2016-04-27 15:00:00","gmt_time_end":"2016-04-27 15:00:00","gmt_time_end_last":"2016-04-27 15:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"434381","name":"ECE Ph.D. Dissertation Defenses"}],"categories":[],"keywords":[{"id":"1808","name":"graduate students"},{"id":"100811","name":"Phd Defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78771","name":"Public"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}