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conferenceseries.com
October 20-22, 2016 Rome, Italy
11th International Conference and Expo on
Nanoscience and Molecular Nanotechnology
Volume 7, Issue 5 (Suppl) J Nanomed Nanotechnol 2016
ISSN: 2157-7439 JNMNT an open access journal NanoScience 2016
October 20-22, 2016
Comprehensive study of ZAIS Nanocrystals photo-physics
Gilles Le Blevennec
Univ Grenoble Alpes, CEA-LETI Minatec Campus 38000 Grenoble France
AgInS2-ZnS (ZAIS) nanocrystals are semiconductor phosphors generally used for a variety of applications in the visible domain
such as LED lighting, bio-imaging or photovoltaics. This communication is about photo-physics of such a nanoparticle. Those
particles behave without quantum confinement, their luminescence has its origin in donor-acceptor pair (DAP) transitions. In a
first step, lifetime of the emissions measured by time resolved spectroscopy will be exploited in order to describe the three radiative
mechanisms acting either on surface or in the core of the particle. In a second time, we will combine lifetime and quantum yield
measurements to quantify radiative and non-radiative recombination rates. This step is a very powerful method for understanding
electronics processes. Indeed, those values associated with other material characterizations (optical absorption and XPS) allows
to determine the relationship between structural properties and emission processes. As consequence, we will establish the direct
effect of disorder on non-radiative recombinations and identify the element defects involved in the photoluminescence. All these
experimental results give a complete analysis of electronics processes occurring in a sub-10nm nanoparticle.
Biography
Graduated from the French, Ecole Nationale Supérieure d’Ingénieur Electricien de Grenoble, Electrical engineering school in 1982. Work as Engineer in Alcatel
and Crismatec companies before to enter in CEA ( French Governmental Research Center) in 1988. Involved in materials for electromagnetism applications
during 8 years, then was responsible of Optical Materials Laboratory at CEA Tours, for 4 years. In 2000, I am promoted Manager of the Material Department in CEA
Grenoble. In 2008, I became Senior Expert in the Optical Department.
Gilles Le Blevennec, J Nanomed Nanotechnol 2016, 7:5 (Suppl)