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DTSTART;TZID=America/Los_Angeles:20260827T113000
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SUMMARY:Synthesis of High-quality 2D Semiconductors: Controlling Defects\, Dopants\, and Polytypes
DESCRIPTION:Deterministic Synthesis of High-quality 2D Semiconductors: Controlling Defects\, Dopants\, and Polytype\nRealizing the potential of 2D transition metal dichalcogenides (TMDs) for next-generation semiconductor technologies will require synthetic films that combine high crystalline quality with wafer-scale uniformity and precise control over electronic and optical properties.\nIn this talk\, I will present recent work from our group on precursor and reactor engineering to improve material quality while enabling control of composition\, doping\, and crystal structure.\nFirst\, I will show how controlling precursor chemistry in solid-source CVD enables WSe2 with enhanced uniformity\, low charged-defect densities\, and high-performance p-type transistors.\nI will then discuss metal-organic CVD approaches for scalable growth of WS2\, including substitutional doping\, alloying\, and selective formation of the ferroelectric 3R polytype with distinct nonlinear optical and valley properties.\nFinally\, I will introduce patterned dopant sources that enable programmed lateral carrier-density profiles.\nTogether\, these results show how advances in synthesis can move 2D semiconductors beyond exfoliated laboratory specimens toward materials whose properties can be engineered during growth for future electronic and optoelectronic devices.\nRead more:\n(https://arxiv.org/pdf/2509.07299)\nSpeaker:\nAndy Mannix\nAssistant Professor of Materials Science and Engineering at Stanford University.\nAGENDA:\nThursday August 27\, 2026\n11:30 AM: Networking\, Pizza & Drinks\nNoon — 1 pm: Seminar\nPlease register on Eventbrite before 9:30 AM on Thursday August 27\, 2026\n$4 IEEE members $6 non IEEE members\n(discounts for unemployed and students )\nBldg: ==> Use corner entrance: Kifer Road / San Lucar Court ==> Do not enter at main entrance on Kifer Road\, EAG Labs\, 810 Kifer Road\, Sunnyvale\, California\, California\, United States\, 95051
URL:https://svec.org/event/synthesis-of-high-quality-2d-semiconductors-controlling-defects-dopants-and-polytypes/
LOCATION:Bldg: ==> Use corner entrance: Kifer Road / San Lucar Court ==> Do not enter at main entrance on Kifer Road\, EAG Labs\, 810 Kifer Road\, Sunnyvale\, California\, California\, United States\, 95051
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