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Marion Gruart - Innovation Thesis Prize

The University of Grenoble Alpes has rewarded Marion Gruart's thesis work with the Innovation Thesis Prize for its exceptional quality. Marion Gruart is a young PhD graduate of the Pheliqs laboratory (NPSC team). The awarded research topic developed by Marion is: Elaboration and properties of InGaN-based nanowires for the realisation of micro and nanoLEDs. The prize will be awarded during the "Doctoral Ceremony" on 22 June 2021

Published on 8 June 2021
III-N semiconductors, including GaN, AlN, InN and their alloys, are the subject of growing interest for the development of optoelectronic devices. Their direct energy gap between the deep UV and IR (6.14 to 0.64 eV) allows a wide range of applications to be exploited. Since the realisation of the first blue LEDs based on InGaN/GaN quantum wells, resulting in the 2014 Nobel Prize in Physics, the InGaN alloy has been particularly studied for the development of visible LEDs. However, the epitaxial fabrication of III-N materials faces many difficulties, including the large lattice mismatch between different III-N materials, as well as with the available substrates. The thesis presented here focuses on the epitaxy of III-N nano- and microwires for the realisation of visible LED structures. In particular, this work seeks to optimise the efficiency of high In content LEDs (around 35% In) for emission in the red range. This thesis led to the filing of 4 patents and the integration of Marion GRUART in the high-tech company Aledia

Keywords: Nitride materials, Light emitting diodes, Nanowires, InGaN, Molecular beam epitaxy, Optoelectronics, Molecular beam epitaxy, Nanowires, Gallium nitride, Light emitting diodes

Thesis supervisors: Bruno DAUDIN and Bruno GAYRAL 

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