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SUMMARY:MechE Colloquium: Compound semiconductor nanostructures: synthesis
  & sustainability aspects
DTSTART:20210330T121500
DTEND:20210330T131500
DTSTAMP:20260412T042953Z
UID:beb3be1adca36f6e5816180ad5fbb2ccd1c3bb488fece1fca39613f3
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Anna Fontcuberta i Morral\, Laboratory of Semiconductor 
 Materials (LMSC)\, EPFL School of Engineering (STI)\, Institute of Materia
 ls (IMX)\nAbstract:\nSome compound semiconductors such as GaAs and InGaAsP
  exhibit a high absorption coefficient in the photon energy of interest fo
 r solar energy conversion. Their commercial potential in terrestrial appli
 cations is reduced due to the scarcity (and thus high cost) of group III e
 lements such as In and Ga. In this talk we present two approaches to rende
 r the use this kind of materials sustainable: a strong reduction in materi
 al use through nanostructures and the replacement of group III by group II
  such as zinc. We find nanostructures also provide a path to increase ligh
 t collection [1]. We show how II-V compounds such as Zn3P2 exhibit one mag
 nitude higher absorption coefficient than GaAs [2]. We explain how these m
 aterials can be fabricated with high crystal quality\, opening the path fo
 r the creation of alternative and sustainable compound semiconductor solar
  cells [3-5].\n\nReferences:\n[1] P. Krogstrup et al Nature Photon 7\, 306
  (2013)\n[2] M.Y. Swinkels et al Phys. Rev. Appl. 14\, 024045 (2020)\n[3] 
 S. Escobar Steinvall et al Nanoscale Horizons 5\, 274-282 (2020)\n[4] R. P
 aul et al\, Crys. Growth. Des. 20\, 3816–3825 (2020)\n[5] S. Escobar Ste
 inval et al. Nanoscale Adv. 3\, 326 (2021)\n\nBio:\nAnna Fontcuberta i Mor
 ral received her Diploma in Physics at the University of Barcelona in 1997
 . She then moved to France where she obtained her PhD in Materials Science
  at Ecole Polytechnique in 2001. She then moved to the group of Harry Atwa
 ter at CalTech\, where she also co-founded the company Aonex Technologies.
  Sponsored by a Marie Curie Excellence Grant she became team leader at the
  Walter Schottky Institute at Technical University of Munich in 2005\, whe
 re she also habilitated in physics in 2009. In 2008\, she joined the Insti
 tute of Materials Science & Engineering at EPFL first as a professor and d
 irector of the Laboratory of Semiconductor Materials. Since January 2021 s
 he is associate vice-president of Centers and Platforms. Among her recogni
 tions are ERC starting grant\, the Emy Noether Prize in Physics and the Po
 lysphere Prize (teaching prize given by undergraduate students).
LOCATION:https://epfl.zoom.us/j/82207717593
STATUS:CONFIRMED
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