{"620405":{"#nid":"620405","#data":{"type":"event","title":"Ph.D. Dissertation Defense - Xiaojia Jia","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETitle\u003C\/strong\u003E\u003Cem\u003E:\u0026nbsp; \u003C\/em\u003E\u003Cem\u003EOrganic Thin-film Transistors and Their Application in Light Detection\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Bernard Kippelen, ECE, Chair , Advisor\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Gregory Durgin, ECE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Elsa Reichmanis, ChemE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Azad Naeemi, ECE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Azadeh Ansari, ECE\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract: \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThin-film transistors (TFTs) are widely used in backplane circuits in consumer electronics. As a type of TFTs, organic thin-film transistors (OTFTs) have some unique properties and attract many interests, since they can be fabricated through cost-effective and solution-based processes at moderate temperatures on a wide range of flexible and deformable substrates. The research develops high-performance OTFTs with improved operational and environmental stabilities by a universal approach, which balances the effects of two mechanisms causing shifts of the threshold voltage with opposite signs in long-term operation. The compensation of these two effects could be realized 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 OTFTs 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 OTFTs is demonstrated. The novel organic photodetector consists of a dual-gate OTFT 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 OTFT 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 Thin-film Transistors and Their Application in Light Detection "}],"uid":"28475","created_gmt":"2019-04-15 15:03:40","changed_gmt":"2019-04-15 20:52:13","author":"Daniela Staiculescu","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2019-04-29T14:00:00-04:00","event_time_end":"2019-04-29T16:00:00-04:00","event_time_end_last":"2019-04-29T16:00:00-04:00","gmt_time_start":"2019-04-29 18:00:00","gmt_time_end":"2019-04-29 20:00:00","gmt_time_end_last":"2019-04-29 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"434381","name":"ECE Ph.D. Dissertation Defenses"}],"categories":[],"keywords":[{"id":"100811","name":"Phd Defense"},{"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":""}}}