DSM : Thesis SL-DSM-14-0389

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Research field

Solid state physics, surfaces and interfaces / Solid state physics, chemistry and nanosciences

Title

Nitride core-shell quantum wells for UV applications

Abstract

Our group specializes in the MOCVD growth (metal -organic chemical vapor deposition) nitride nanostructures has developed an expertise on the growth of catalyst-free GaN wires (0.5- 1µm in diameter and up to several tens of micrometers). The growth of core-shell InGaN/GaN quantum wells has been achieved exhibiting intense visible light emission. Several wire-based applications have been demonstrated with this type of heterostructures, such as light emitting diodes (LEDs), photodetectors and more recently solar cells.



We recently started a new research axis dealing with the growth of core-shell heterostructures for UV. In this framework, we work in collaboration with the group of N. Grandjean from EPFL (Ecole Polytechnique Fédérale de Lausanne) in Switzerland to develop the growth of atypical quantum wells GaN/InAlN. This type of hétérostucture has the advantage of having almost the same lattice parameter allowing to grow defect-free quantum wells on GaN wires in core-shell geometry. Promising optical properties have been measured on this type of wells with intense UV emission at 330 nm. Other types of wells may be studied to explore shorter UV wavelengths, such as AlGaN/InAlN and InAlN/AlN systems. This PhD project aims to up the fabrication of wire-based devices working in the UV range. For example, we can imagine designing UV LED, UV micro-laser or inter-sub-band detectors. This project represents a new fundamental research focus on nitrides nanowires.

Location

Institut nanosciences et cryogénie
Service de Physique des Matériaux et Microstructures
Laboratoire de Nano Physique des Semi-Conducteurs
Centre : Grenoble
Starting date : 01/09/2014

Contact person

Christophe DURAND
UJF / NPSC/Laboratoire de Nano Physique des Semi-Conducteurs
CEA-CNRS-UJF group "Nanophysique et Semiconducteurs"

SP2M, UMR-E CEA / UJF-Grenoble 1, INAC, Grenoble, F-38054, France
Phone : 04 38 78 19 77

University / Graduate School

Grenoble I (UJF)
Ecole Doctorale de Physique de Grenoble - Grenoble I -

Thesis supervisor

Joël EYMERY
CEA / DSM/INAC/SP2M/NPSC
CEA-CNRS-UJF group "Nanophysique et Semiconducteurs"

SP2M, UMR-E CEA / UJF-Grenoble 1, INAC, Grenoble, F-38054, France





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