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2D materials, colloidal nanocrystals and mixed dimensional heterostructures for nanoelectronics and optoelectronics in high doping regime

Abstract : Nanomaterials and especially two-dimensional (2D) materials and nanocrystals have attracted increasing research interests for nanoelectronics and optoelectronics in recent years. When those nanomaterials are implemented in devices, modulating their carrier densities is essential to adapt their electrical properties and functions, with new physical phenomena expecting to occur at a higher doping level. In my thesis work, I explore a new solid gate technology based on ionic glass crystal (LaF3) to induce high electrostatic doping in 2D materials (MoSe2, MoS2, WSe2…) and nanocrystals (HgTe, PbS…) in (photo)transistor like structures. Finally, using large scale graphene electrodes processing on LaF3, the carrier selective of those electrodes combined with the high capacitance gating of ionic glass, I demonstrate a new architecture graphene-HgTe heterostructure with performances for infared detection.
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https://tel.archives-ouvertes.fr/tel-03270928
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Submitted on : Friday, June 25, 2021 - 11:15:18 AM
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Ulrich Noumbe Nguetchuissi. 2D materials, colloidal nanocrystals and mixed dimensional heterostructures for nanoelectronics and optoelectronics in high doping regime. Other [q-bio.OT]. Université de Strasbourg, 2020. English. ⟨NNT : 2020STRAE020⟩. ⟨tel-03270928⟩

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