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The aim of this thesis is to design high-efficiency power converters based on resonating piezoelectric transducers. A large part of the work is to develop the electrical cycle able to energetically maintain the piezoelectric resonator in resonance and ensure zero-voltage switching, for electrical energy transfer from the source to the piezoelectric resonator or from the […] >>

Redox photocatalysis is more and more popular in synthetic and pharmaceutical chemistry for preparing organic compounds is mild conditions. It aims to convert visible light absorbed by a photocatalyst into charges (electron and/or holes) with redox potentials well adapted for performing reduction and/or oxidation reactions. These reactions can be very efficient and enable the formation […] >>

The advance of LED micro displays requires high resolution and brightness for a wide range of applications such as smart phone or virtual reality. These new products specifications raise challenges in terms of pixels size and density, material integration and fabrication techniques. In this context, Gallium Nitride has been extensively used and studied for its […] >>

The conversion of electrical energy is currently a major issue within our societies, whether to reduce losses, to allow the integration of a maximum of renewable energy from wind or solar power or to have cleaner mobility (electric vehicles, whatever their size, individual or collective), in industry as well as in the residential sector. The […] >>

The DTBS at Leti develops new technologies to invent tomorrow’s medical diagnostic and therapeutic innovations in collaboration with public hospitals and universities. Inside this department, the LSMB lab gathers a multidisciplinary team to design and produce microfluidic systems for healthcare and biology applications. In collaboration with researchers from IRIG, the lab has set-up an innovative […] >>