{"611122":{"#nid":"611122","#data":{"type":"event","title":"Ph.D. Proposal Oral Exam - Xiaojia Jia","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETitle:\u0026nbsp; \u003C\/strong\u003E\u003Cem\u003EOrganic Field-Effect Transistors and Their Application in Light Detection\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u0026nbsp; \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Kippelen, Advisor\u0026nbsp;\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Durgin, Chair\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Reichmanis\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract: \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe objective of the proposed research is to develop a universal approach to improve the operational and environmental stabilities of organic field-effect transistors (OFETs) using low-cost fabrication methods. A second goal is to develop organic photodetectors with high responsivity based on a novel device architecture with the highly-stable OFETs. The preliminary research shows a simple approach to balance the effects of two mechanisms causing shifts of the threshold voltage with opposite signs in long-term operation by engineering the bilayer gate dielectric comprising an amorphous fluoropolymer (CYTOP) layer and an Al2O3- HfO2 nanolaminate grown by atomic layer deposition (ALD) technique. This compensation mechanism leads to devices with remarkable thermal, environmental, and long-term operational stability that is comparable or superior to that of commercial inorganic TFT technologies. These OFETs with outstanding stability show great potential in a variety of applications, especially in light signal detection. Therefore, a new concept of organic photodetector based on these OFETs was demonstrated. The novel organic photodetector consists of a dual-gate OFET and an organic photodiode (OPD) that operates in a photovoltaic mode without power consumption. The advantages of fast photoresponse of OPD and amplification property of OFET enable a high photoresponsivity as well as short response time for this novel organic photodetector.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Organic Field-Effect Transistors and Their Application in Light Detection"}],"uid":"28475","created_gmt":"2018-09-07 22:03:31","changed_gmt":"2018-09-07 22:03:31","author":"Daniela Staiculescu","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2018-09-25T11:30:00-04:00","event_time_end":"2018-09-25T13:30:00-04:00","event_time_end_last":"2018-09-25T13:30:00-04:00","gmt_time_start":"2018-09-25 15:30:00","gmt_time_end":"2018-09-25 17:30:00","gmt_time_end_last":"2018-09-25 17:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"434371","name":"ECE Ph.D. Proposal Oral Exams"}],"categories":[],"keywords":[{"id":"102851","name":"Phd proposal"},{"id":"1808","name":"graduate students"}],"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":""}}}