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International audience; The ribbon on sacrificial template (RST) process is a ribbon direct-wafering technology with specific ability for high throughput and thin multicrystalline wafer production, in the range of 60-140 μm. Mechanical and electrical properties of the RST material were investigated. Ball on ring and four-point bending tests showed good fracture stress values up to 260 MPa. The conversion efficiency potential for passivated emitter and rear cells (PERC) made out from the RST material, around 16%, is shown to be limited by defects reducing minority carrier lifetime. The interaction between impurities, such as C and transitions metals, with structural defects such as dislocations, results in highly recombinative areas in RST wafers. A model is proposed which shows that the carbon substrate is an important source of carbon contamination in the silicon melt during the growth of the ribbon. This high C contamination can be accompanied by transition metal contamination and can have an influence on the growth stability and on the generation of structural defects, especially if C accumulates in a boundary layer just above the growth interface. The study of the segregation of Sb indicates that the process conditions are close to the case of the diffusive regime near the solid/liquid interface, with a boundary layer thickness of about 70 μm.

Unknown outside the Asian jungles almost fourty years ago, the tiger mosquito Aedes albopictus, vector of several human pathogens, is now established across the 5 continents, including in urban areas. In France, a national plan for surveillance of dengue and chikungunya is active, and some autochthonous cases of transmission have been reported recently, underlying the present risk of transmission in areas where the mosquito is present. Probably first introduced in the Rhône-Alpes area via road transport, Ae. albopictus is since 2013 considered present and active in 5 on 8 departments. For the surveillance purposes, it is now a question of identifying areas suitable for this mosquito and how these areas could be colonized. Thus, the aim of this study is to build maps of susceptibility of Ae. albopictus presence in the Rhône-Alpes area by a modelling approach combining knowledge on both the climatic and environmental determinants for establishment., Inconnu en dehors des jungles asiatiques il y a encore quarante ans, le moustique tigre Aedes albopictus, vecteur de nombreux agents pathogènes humains, s’est désormais établi sur les cinq continents, y compris en ville. En France, il fait l’objet d’un plan national de surveillance de la dengue et du chikungunya et plusieurs cas de transmission autochtones ont été reportés récemment, soulignant ainsi la réalité du risque de transmission dans les zones où ce moustique est implanté. Probablement introduit en région Rhône-Alpes via le transport routier, Ae. albopictus est considéré comme présent et actif dans cinq des huit départements depuis 2013. Il est aujourd’hui question d’identifier les zones favorables à son implantation et comment la colonisation vers ces zones pourrait se faire. Ainsi, l’objectif de notre travail est de construire des cartes de susceptibilité de présence d’Ae. albopictus en Rhône-Alpes par modélisation combinant à la fois les connaissances sur les déterminants climatiques mais aussi environnementaux de son installation.

International audience

International audience