{"681949":{"#nid":"681949","#data":{"type":"event","title":"MS Defense by Vatsasri Raman","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EVatsasri Raman\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EAdvisor: Dr. Juan-Pablo, Correa-Baena\u003C\/p\u003E\u003Cp\u003E\u003Cbr\u003E\u003Cem\u003Ewill defend a Master\u2019s thesis entitled\u003C\/em\u003E,\u003C\/p\u003E\u003Cp\u003E\u003Cbr\u003E\u003Cstrong\u003EDESIGN OF A DIKETOPYRROLOPYROLE-BASED POLYMER FOR EFFICIENT AND STABLE PEROVSKITE PHOTOVOLTAICS\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cbr\u003E\u003Cem\u003EOn\u003C\/em\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cbr\u003ETuesday, April 22nd at 03:00 p.m.\u003Cbr\u003E102A Joseph M. Pettit Microelectronics Research\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003Eand\u003C\/p\u003E\u003Cp\u003EVirtually via MS Teams\u003C\/p\u003E\u003Cp\u003E\u003Ca href=\u0022https:\/\/teams.microsoft.com\/l\/meetup-join\/19%3ameeting_ZWVlZWU0NTEtNTAzMi00ZGZmLTliZTYtZDMxMjhiOTBmZmZi%40thread.v2\/0?context=%7b%22Tid%22%3a%22482198bb-ae7b-4b25-8b7a-6d7f32faa083%22%2c%22Oid%22%3a%225915c786-3146-4956-bec7-17a8c4d760ce%22%7d\u0022\u003Ehttps:\/\/teams.microsoft.com\/l\/meetup-join\/19%3ameeting_ZWVlZWU0NTEtNTAzMi00ZGZmLTliZTYtZDMxMjhiOTBmZmZi%40thread.v2\/0?context=%7b%22Tid%22%3a%22482198bb-ae7b-4b25-8b7a-6d7f32faa083%22%2c%22Oid%22%3a%225915c786-3146-4956-bec7-17a8c4d760ce%22%7d\u003C\/a\u003E\u003C\/p\u003E\u003Cdiv\u003E\u003Cp\u003E\u003Ca 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alt=\u0022A group of blue circles with white letters\u0026#13;\u0026#13;AI-generated content may be incorrect.\u0022 width=\u0022160\u0022 height=\u0022160\u0022\u003E\u003C\/a\u003E\u003C\/p\u003E\u003Cp\u003E\u003Ca href=\u0022https:\/\/teams.microsoft.com\/l\/meetup-join\/19%3ameeting_ZWVlZWU0NTEtNTAzMi00ZGZmLTliZTYtZDMxMjhiOTBmZmZi%40thread.v2\/0?context=%7b%22Tid%22%3a%22482198bb-ae7b-4b25-8b7a-6d7f32faa083%22%2c%22Oid%22%3a%225915c786-3146-4956-bec7-17a8c4d760ce%22%7d\u0022 target=\u0022_blank\u0022\u003EJoin conversation\u003C\/a\u003E\u003C\/p\u003E\u003Cp\u003Eteams.microsoft.com\u003C\/p\u003E\u003C\/div\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ECommittee\u003C\/strong\u003E\u003Cbr\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Prof. Juan-Pablo Correa-Baena \u2013 School of MSE (Advisor)\u003C\/p\u003E\u003Cp\u003EProf. Jason D. Azoulay \u2013 School of Chemistry and Biochemistry\u003Cbr\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Dr. Carlo Perini \u2013 School of MSE\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cbr\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003Cbr\u003EPerovskite solar cells (PSCs) have emerged as a highly efficient and low-cost photovoltaic technology, achieving power conversion efficiencies (PCEs) over 26%. However, their widespread adoption is limited by poor stability, often worsened by the hygroscopic dopants used in conventional hole transport layers (HTLs) like 2,2\u2032,7,7\u2032-tetrakis (N, N-p-dimethoxyphenylamino)-9,9\u2032-spirobifluorene (spiro-OMeTAD), a small molecule HTL and poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] PTAA, a polymer HTL. To overcome this, dopant-free HTLs with high intrinsic mobility and thermal stability are critical. This study investigates a diketopyrrolopyrrole (DKP)-based donor\u2013acceptor conjugated polymer incorporating (E)-2-(2-thiophen-2-yl) vinyl) thiophene (TVT) as a dopant-free HTL. The polymer exhibits a narrow band gap, strong intramolecular charge transfer, and quinoidal character, leading to high planarity and excellent \u03c0\u2013\u03c0 stacking. These features enable a high hole mobility of 1.26 \u00d7 10\u207b\u00b2 cm\u00b2 V\u207b\u00b9 s\u207b\u00b9 without doping. We evaluate its absorption properties, energy level alignment, film morphology, and photovoltaic performance in perovskite solar cells. The material\u2019s hydrophobic nature and stable charge transport properties offer a promising path toward eliminating dopant-related degradation. Integrating this polymer as a HTL can yield comparable efficiencies to conventional doped layers, while significantly enhancing device stability. This work highlights the potential of narrow band gap donor\u2013acceptor polymers in advancing the next generation of stable, efficient perovskite solar cells.\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003E\u003Cstrong\u003EDESIGN OF A DIKETOPYRROLOPYROLE-BASED POLYMER FOR EFFICIENT AND STABLE PEROVSKITE PHOTOVOLTAICS\u003C\/strong\u003E\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"DESIGN OF A DIKETOPYRROLOPYROLE-BASED POLYMER FOR EFFICIENT AND STABLE PEROVSKITE PHOTOVOLTAICS"}],"uid":"27707","created_gmt":"2025-04-22 13:28:06","changed_gmt":"2025-04-22 13:29:01","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2025-04-22T15:00:00-04:00","event_time_end":"2025-04-22T17:00:00-04:00","event_time_end_last":"2025-04-22T17:00:00-04:00","gmt_time_start":"2025-04-22 19:00:00","gmt_time_end":"2025-04-22 21:00:00","gmt_time_end_last":"2025-04-22 21:00:00","rrule":null,"timezone":"America\/New_York"},"location":"102A Joseph M. Pettit Microelectronics Research","extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"111531","name":"ms 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":""}}}