90 results found

[Thesis]

Compressive sensing and signal processing of sparse acoustic signals for sources detection, classification and localization

Offer N°: SL-DRT-15-0645

Start date: 1 Oct 2015

The objective of this PhD thesis is the monitoring of industrial electric systems. In particular, the focus is put on rare events detection with important failures on the system (as electric arcs) from a distributed acoustic sensors network. This PhD deals with the optimization of the following steps: signal digitalization, signal processing and data transmission. Those subjects lie in the context of compressive sensing and signal processing of compressed data.



[Thesis]

Development of high resolution photo-modulated Kelvin Probe Force Microscopy for photovoltaics

Offer N°: SL-DRT-15-0619

Start date: 1 Oct 2015

Nowadays, improvements in performance of third generation solar cells are strongly dependent on developing advanced characterization tools capable of mapping the opto-electronic properties of photovoltaic (PV) materials at the nanometer scale. Within the Nano characterisation platform (PFNC), we develop advanced approach based on Atomic Force Microscopy (AFM) and its electrical modes such as Kelvin Probe Force Microscopy (KPFM).



[Thesis]

Statistical Models Development for Planarized Surfaces

Offer N°: SL-DRT-15-1028

Start date: 1 Oct 2015

One of Leti R&D axes is focusing on is to improve the form factor (size) while increasing functionality and performances. This is the “More than Moore” approach, where stacking and going up to 3D, whether we are talking about 3D transistors (FinFET), or 3D stacked IC Monolithic 3D IC through wafer bonding, are both CMP-enabled. Whether we go down (shrinking-devices) or up (stacking-devices), surface quality (i.e.



[Thesis]

Fabrication and testing of multijunction IIIV on Si solar cells

Offer N°: SL-DRT-15-0714

Start date: 1 Oct 2015

The crystal Silicon photovoltaic industry recently demonstrated record efficiency values over 25%, approaching the Si theoretical limit. Multijunction solar cells based on IIIV materials can overcome this limit: efficiencies over 44% have been reported on 4 junctions under 247suns. Due to the elevated cost of these cells, this technology is dedicated to high concentration.

An intermediate solution consists in combining IIIV and Si materials in order to:



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