Dr. Joan Redwing
Distinguished Professor of Materials Science and Engineering and Electrical Engineering; Director of NSF 2D Crystal Consortium
“Ultra-thin 2D Semiconductors for Next Generation Devices“
11.15.23 | 4:10PM
The field of two-dimensional (2D) materials began with the advent of graphene but has expanded to a wide class of materials that occur naturally as layered crystals. Within this class of materials, semiconducting transition metal dichalcogenides (TMDs) such as MoS2 and WSe2 have attracted significant interest in condensed matter physics and next generation electronics and optoelectronics. At the single layer limit, the TMDs exhibit direct band gaps which results in efficient light emission and retain good carrier mobility compared to conventional semiconductors such as silicon. Furthermore, TMD layers with different compositions and properties can be stacked to create unique heterostructures. Practical device applications, however, require large area single layer TMD films which presents unique challenges. Our work has focused on the development of metalorganic chemical vapor deposition as a manufacturing-compatible approach for wafer-scale semiconducting TMDs. Applications of large area TMD films in photonics and nanoelectronics will be highlighted.
Joan Redwing is a Distinguished Professor of Materials Science and Engineering and Electrical Engineering at Penn State University. She serves as Director of the 2D Crystal Consortium, an NSF Materials Innovation Platform (MIP) national user facility that is focused on the synthesis and characterization of 2D materials for next generation devices. Her research focuses on crystal growth and epitaxy of electronic materials, with an emphasis on thin film and nanomaterial synthesis by metalorganic chemical vapor deposition. She is a fellow of the Materials Research Society, the American Physical Society, and the American Association for the Advancement of Science. She is an author on over 350 publications in refereed journals and holds 8 U.S. patents.
Host: Sharon Weiss