{"589722":{"#nid":"589722","#data":{"type":"event","title":"Ph.D. Dissertation Defense - Vladimir Kolesov","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETitle:\u003C\/strong\u003E\u003Cem\u003E Solution-Based Electrical P-type Doping of Semiconducting Polymer Films Over a Limited Depth in High-Performance Organic Photovoltaic Devices\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. Oliver Brand, ECE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Andrew Peterson, ECE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Azad Naeemi, ECE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Samuel Graham, ME\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 this research is to explore a simple way of electrically doping organic semiconducting films for applications in high efficiency organic photovoltaic devices. Solution-based electrical doping protocols may allow more versatility in the design of organic electronic devices; yet, controlling the diffusion of dopants in organic semiconductors and their stability has proven challenging. Here we present a solution-based approach for electrical p-doping of films of donor-like conjugated organic semiconductors and their blends with acceptors over a limited depth with a decay constant of 10-20 nm by post-process immersion into a polyoxometalate solution (phosphomolybdic acid, PMA) in nitromethane. PMA-doped films show increased electrical conductivity and work function, reduced solubility in the processing solvent, and improved photo-oxidation stability in air. This approach is applicable to a variety of organic semiconductors used in photovoltaics and field-effect transistors. PMA doping over a limited depth of bulk heterojunction polymeric films in which amine-containing polymers were mixed in the solution used for film formation enables single-layer organic photovoltaic devices, processed at room temperature, with power conversion efficiencies up to 5.9 \u0026plusmn; 0.2% and stable performance on shelf-lifetime studies at 60 \u0026deg;C for at least 280 h.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Solution-Based Electrical P-type Doping of Semiconducting Polymer Films Over a Limited Depth in High-Performance Organic Photovoltaic Devices "}],"uid":"30865","created_gmt":"2017-04-04 11:37:02","changed_gmt":"2017-04-04 11:37:02","author":"Jacqueline Trappier","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-11T15:00:00-04:00","event_time_end":"2017-04-11T16:00:00-04:00","event_time_end_last":"2017-04-11T16:00:00-04:00","gmt_time_start":"2017-04-11 19:00:00","gmt_time_end":"2017-04-11 20:00:00","gmt_time_end_last":"2017-04-11 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":""}}}