“Ultra-Wide Bandgap Semiconductors for Next-Generation Power Electronics”
Thursday, March 23 at 1:00pm
Over the past two decades, wide band gap GaN and SiC semiconductor device technology has transitioned into the commercial power and radio frequency electronics marketspace. A new class of semiconductors with ultra-wide band gap (UWBG), EG > 4.5 eV, have since emerged, mainly as a result of advances in material synthesis. UWBG semiconductors such as Gallium Oxide (β-Ga2O3, EG ~ 4.85 eV) leverage strengths such as high critical field and large-area substrate growth technology similar to that of Silicon. Using GaN, β-Ga2O3, and diamond as examples, this talk will discuss the future of UWBG semiconductor technology and highlight research at the Naval Research Lab addressing the ever-increasing requirements for high power electronic devices. We will highlight challenges and recent advances with a focus on thermal and doping issues, as well as novel concepts for next-generation WBG/UWBG power electronics.
Dr. Marko J. Tadjer is a civilian electronics engineer at the Electronic Science and Technology Division at the US Naval Research Laboratory in Washington, DC. He received a Ph.D. in Electrical Engineering from the University of Maryland, College Park in 2010, a Master of Science in Electrical Engineering from Duke University in 2004, and undergraduate degrees in Electrical and Computer Engineering from the University of Arkansas in 2002. He has completed postdoctoral fellowships at the Technical University of Madrid in 2013 and at the power electronics branch of the US Naval Research Lab, where he was awarded a Karles’ Fellowship in April 2015. His research in power devices focuses on the integration of materials with attractive properties such as diamond with more mature GaN and SiC technology, as well as exploring novel oxides such as Ga2O3 for power electronics applications. He has authored or co-authored 9 book chapters, over 250 archival publications, and is a co-inventor on 20 US patents. Dr. Tadjer is co-editor of “Thermal Management of Gallium Nitride Electronics,” published by Elsevier in 2022. He is a Senior Member of the IEEE.