{"684643":{"#nid":"684643","#data":{"type":"event","title":"Ph.D. Proposal Oral Exam - Wookjin Choi","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETitle:\u0026nbsp; \u003C\/strong\u003E\u003Cem\u003EHigh-efficiency Tunnel Oxide Passivated Contact Solar Cells using Advanced Structures and Technologies\u003C\/em\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EDr. Rohatgi, Advisor\u003C\/p\u003E\u003Cp\u003EDr. Graber, Chair\u003C\/p\u003E\u003Cp\u003EDr. Gaylord\u003C\/p\u003E","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EThe objective of this research is to develop cost-effective, high-efficiency crystalline silicon (c-Si) solar cells by integrating Tunnel Oxide Passivated Contact (TOPCon) technology into advanced device architectures. Current solar cell performance is primarily limited by recombination and resistive losses at metal-Si contact interface. The proposed work addresses these challenges through the implementation of TOPCon technology, fundamental understanding, detailed material characterization, comprehensive device modeling and novel process solutions. High-efficiency, large-area solar cells will be fabricated to demonstrate the commercial readiness of these advanced TOPCon solar cells. A key aspect of achieving high efficiency is reducing the reverse saturation current density (J0) and the contact resistivity (\u03c1c) at the metal-Si interface, enhancing both the open-circuit voltage (Voc), and fill factor (FF). This research will specifically focus on the following tasks: (1) Establishing a quantitative framework to correlate carrier selectivity to solar cell efficiency, identifying a pathway toward high-efficiency TOPCon-based solar cells; (2) Developing a p-type TOPCon solar cell with highly a highly efficient hole-selective TOPCon layer, replacing traditional Al-alloyed hole contacts in current main stream Passivated Emitter and Rear Contact (PERC) cells; (3) Developing a novel double-side TOPCon solar cell structure featuring electron- and hole- selective TOPCon layers on both sides to maximize the potential of TOPCon technology; and (4) Conducting a preliminary investigation into integrating the TOPCon technology into an Interdigitated Back Contact (IBC) architecture, regarded as the ultimate c-Si solar cell architecture due to its highest efficiency potential.\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"High-efficiency Tunnel Oxide Passivated Contact Solar Cells using Advanced Structures and Technologies"}],"uid":"28475","created_gmt":"2025-09-08 18:45:24","changed_gmt":"2025-09-08 18:46:41","author":"Daniela Staiculescu","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2025-09-12T11:00:00-04:00","event_time_end":"2025-09-12T13:00:00-04:00","event_time_end_last":"2025-09-12T13:00:00-04:00","gmt_time_start":"2025-09-12 15:00:00","gmt_time_end":"2025-09-12 17:00:00","gmt_time_end_last":"2025-09-12 17:00:00","rrule":null,"timezone":"America\/New_York"},"location":"Room W218, Van Leer","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":""}}}