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<dc:title xml:lang="fr">Croissance et caractérisation de nano-cristaux fonctionnels de Si1-xGex éventuellement dopés dans diverses matrices diélectriques</dc:title>
<dcterms:alternative xml:lang="en">Growth and characterization of functional Si1-xGex nanocrystals eventually doped in various dielectric matrices</dcterms:alternative>
<dc:subject xml:lang="fr">Nanocristaux</dc:subject>
<dc:subject xml:lang="fr">Si1-xGex</dc:subject>
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<dc:subject xml:lang="fr">SiOxNy</dc:subject>
<dc:subject xml:lang="fr">Implantation ionique</dc:subject>
<dc:subject xml:lang="fr">PECVD</dc:subject>
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<dc:subject xml:lang="en">Si1-xGex</dc:subject>
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<dc:subject xml:lang="en">SiOxNy</dc:subject>
<dc:subject xml:lang="en">Ion implantation</dc:subject>
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<tef:elementdEntree autoriteExterne="155877585" autoriteSource="Sudoc">Transistors bipolaires à hétérojonctions</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="137394861" autoriteSource="Sudoc">Nanocristaux semiconducteurs</tef:elementdEntree>
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<tef:vedetteRameauNomCommun>
<tef:elementdEntree autoriteExterne="033443653" autoriteSource="Sudoc">Dépôt chimique en phase vapeur activé par plasma</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Au cours de ces dernières années, les nanostructures à base de silicium et de germanium, enfouies dans une matrice diélectrique, ont été largement étudiées en raison de leurs applications potentielles dans la nanoélectronique et l’optoélectronique. Afin de fabriquer des dispositifs de haute performance avec des nanocristaux Si1-xGex, il est nécessaire de connaître et de contrôler leurs propriétés structurelles et électriques, ce qui est le but de ce travail. Pour cela, nous avons utilisé la co-implantation ionique de Si et de Ge avec différentes doses dans des matrices de SiO2 pour synthétiser les NCx de Si1-xGex. Concernant l’influence de la matrice sur les propriétés des NCx, nous avons également utilisé l’implantation ionique de Ge dans des films minces de SiOxNy riches en Si élaborés par PECVD. Enfin, l’effet de la présence des dopants sur les propriétés structurales et électriques des NCx de Si1-xGex a été étudié par la co-implantation des dopants avec le Si et le Ge dans le SiO2. Suite à l'implantation des éléments désirés (Si, Ge et éventuellement le dopant), la formation des NCx est induite par un recuit thermique à 1000 ou 1100°C.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Semiconductor nanostructures based on silicon and germanium have attracted enormous interest in the last years because of their potential applications in nanoelectronics and optoelectronics. In order to fabricate high performance devices with Si1-xGex nanocrystals, it is required to know and control their structural and electrical properties which is the aim of our study. For that, we used the ionic co-implantation of Si and Ge of different fluences in SiO2 matrices to synthesize the Si1-xGex NCx. Matrix effect on the properties of Si1-xGex NCx, have been also studied by the implantation of Ge in Si-rich SiOxNy thin films prepared by PECVD. Finally, the effect of the presence of dopants on the structural and electrical properties of Si1-xGex NCx has been studied by the co-implantation of dopants with Si and Ge in SiO2. The formation of NCx is induced by thermal annealing at 1000 or 1100 °C after the implantation of the desired elements (Si, Ge and possibly the dopant).</dcterms:abstract>
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