ORGANISATION/COMPANYUniversity of Lorraine / Institute Jean Barriol
RESEARCH FIELDChemistry › Solar chemistry
RESEARCHER PROFILEFirst Stage Researcher (R1)
APPLICATION DEADLINE15/04/2019 21:00 - Europe/Brussels
LOCATIONFrance › Nancy
TYPE OF CONTRACTTemporary
HOURS PER WEEK40
OFFER STARTING DATE01/10/2019
The interest of organometallic complexes for optical applications such as luminescent materials, photosensitizers, photocatalysts, biomaterials or nanomaterials for optoelectronics continues to grow. The development of such applications involves the careful design of metal complexes with appropriate photophysical properties to ensure efficient light collection based on high absorption and wide band, exciton generation in the condensed phase and charge transfer in the excited state. Therefore, the properties of the excited state in terms of energy and lifetime determine the functional performance of molecules and, therefore, of nanostructures or devices composed of these molecular units.
The aim of the PhD program is to develop photosensitive compounds from low-cost and environmentally friendly metal complexes. While ruthenium complexes have been widely studied and used in many laboratory applications because of their ideal photophysical properties, ruthenium is a rare, toxic and expensive metal, which limits real industrial development. Our project aims to replace this metal with other metals such as iron, which is strategic in the search for low-cost devices and industrial processes that conserve resources. In particular, we are targeting the development of photosensitizers for the manufacture of dye solar cells (DSSCs).
However, replacing ruthenium with iron is a major challenge and is actively pursued. Indeed, unlike ruthenium, with iron complexes, we are witnessing an ultra-fast non-radiative deactivation of 1,3MLCT (metal-ligand charge transfer) states in the 5T2 quintuplet of low energy metal-centric energy, making the complexes unusable for applications in devices requiring the exploitation of the MLCT transition such as DSSCs.
In this context, the project aims to improve and control in a rational way the electronic and geometric properties of excited states of iron complexes in order to be able to apply them in solar cells. Therefore, a first objective is to establish generic rules and guidelines for the relationship between chemical structure and photophysical properties. This initial gain of knowledge from the thesis work is the key to rationalizing, in a second step, the properties of excited states for the manufacture of metal complexes applicable in photonic and energy conversion applications. To do this, the project is based on an interdisciplinary approach combining chemical synthesis, which is the central part of the thesis work, with theoretical calculation and ultrafast spectroscopy, up to the manufacture of solar devices such as DSSCs.
working in a multidisciplinary environment ; synthesis, photophysics, computational chemistry and device assembly.
Become competent in the field of renewable energy development.
The candidate should have received at least 12/20 Master1 and Master2 for the theoretical part
The candidates with adequate profile and education level will be interviewed by a selection committee on May.
REQUIRED LANGUAGESENGLISH: GoodFRENCH: Basic
The candidate should have good theoretical and pratical levels in organic/organometallic chemistry and related characterization techniques.
Additional skills in solar cells fabrication (especially DSSCs) would be
appreciated but not mandatory.
The candidate must be open-minded and willing to work in a multidisciplinary environment.
EURAXESS offer ID: 390293