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SUMMARY:IEL Seminar: Nanoscale design for large-scale challenges – New t
 echnologies for efficient power devices\, effective thermal management and
  faster electronics
DTSTART:20201203T140000
DTEND:20201203T150000
DTSTAMP:20260511T074706Z
UID:11902465a29635da443f0a335a58392693b5f55f31b1b30db59921d5
CATEGORIES:Conferences - Seminars
DESCRIPTION:Elison Matioli is an assistant professor in the institute of e
 lectrical engineering at Ecole Polytechnique Fédérale de Lausanne (EPFL)
 \, since 2015. He received a double B.Sc. degree in applied physics and ap
 plied mathematics from Ecole Polytechnique (Palaiseau\, France) and in ele
 ctrical engineering from University of Sao Paulo\, Brazil\, followed by a 
 Ph.D. degree from the Materials Department at the University of California
 \, Santa Barbara (UCSB) in 2010. He was a post-doctoral fellow in the EECS
  department at the Massachusetts Institute of Technology (MIT) until 2014.
  He has received the UCSB Outstanding Graduate Student - Scientific Achiev
 ement Award for his Ph.D. work\, the 2013 IEEE George Smith Award\, the 20
 15 ERC Starting Grant Award\, the 2016 SNSF Assistant Professor Energy Gra
 nt Award and the 2020 University Latsis Prize.\nAbstract: Electricity is t
 he fastest growing form of end-use energy\, however a considerable portion
  of the electricity consumed worldwide is wasted in power conversion\, esp
 ecially in power semiconductor devices. The outstanding properties of Gall
 ium Nitride semiconductors for power electronic devices can enable signifi
 cantly more efficient and compact future power converters. Despite the exc
 eptional recent progress\, the performance of current GaN power devices is
  still far below the limits of this material. Further improvements require
  a reduction of the on-resistance\, while maintaining large voltage-blocki
 ng capabilities\, along with an improved thermal management\, which will e
 nable higher efficiency\, larger power density and smaller devices.\nTo ad
 dress these challenges\, this talk will discuss new technologies to drasti
 cally reduce the sheet resistance in these semiconductors. Combined with a
  judicious design of the electric field distribution\, based on nanostruct
 ures\, this approach enables to concurrently reduce the on-resistance and 
 increase the breakdown voltage of power devices\, leading to figures of me
 rit far beyond the state-of-the-art [1].\nTo manage the large heat fluxes 
 in power devices\, I will present new technologies based on integrated mic
 rofluidic cooling inside the device. By co-designing microfluidics and ele
 ctronics within the same semiconductor substrate\, a monolithically integr
 ated manifold microchannel cooling structure was produced with efficiency 
 beyond what is currently available. Our results show that heat fluxes exce
 eding 1.7 kW/cm2 could be extracted using only 0.57 W/cm2 of pumping power
 . An unprecedented coefficient of performance (exceeding 10\,000) for sing
 le-phase water-cooling was achieved\, corresponding to a 50-fold increase 
 compared to straight microchannels [2]. The proposed cooling technology sh
 ould enable further miniaturization of electronics\, potentially extending
  Moore’s law and greatly reducing the energy consumption in cooling of e
 lectronics. Furthermore\, by removing the need for large external heat sin
 ks\, this approach enables the realization of very compact power converter
 s integrated on a single chip.\nFinally\, this talk will discuss novel app
 roaches for ultra-fast electronics based on picosecond switches and future
  directions for novel electronic devices [3].\n\nReferences:\n\n	J. Ma\, C
 . Erine\, M. Zhu\, L. Nela\, K. Cheng\, E. Matioli\, “1200 V Multi-Chann
 el Power Devices with 2.8 Ω·mm ON-Resistance”\, 2019 IEEE Internationa
 l Electron Devices Meeting (IEDM)\, San Francisco\, CA\, pp. 4.1.1-4.1.4\,
  (2019)\n	R. Van Erp\, R. Soleimanzadeh\, L. Nela\, G. Kampitsis and E. Ma
 tioli\, “Co-designing electronics with microfluidics for more sustainabl
 e cooling”\, Nature 585\, 211–216 (2020)\n	M. S. Nikoo\, A. Jafari\, N
 . Perera\, G. Santoruvo\, E. Matioli\, “Nanoplasma-Enabled Picosecond Sw
 itches for Ultra-Fast Electronics”\, Nature\, 579 (7800)\, 534-539\, (20
 20)\n
LOCATION:Zoom: https://epfl.zoom.us/j/87045323554
STATUS:CONFIRMED
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