PhD student (M/F) on the robotic synthesis and characterization of new hybrid perovskites for LED technology

Job Description

Thesis Subject

The discovery of new materials has traditionally relied on time-consuming and repetitive methods. While recent advances in closed-loop synthesis-characterization-prediction cycles, driven by ready-to-use optimization algorithms combined with robotic platforms, have accelerated the process, these approaches are inherently limited. The chemical systems under investigation are predefined by human scientists and constrained to low-dimensional spaces, making them suitable for optimization but not for groundbreaking discoveries. Current data-driven methods lack the ability to "think outside the box" and thus cannot achieve the breakthroughs needed to discover new exceptional materials. The ExplorMat project seeks to address this challenge by developing a new methodology for the exhaustive exploration of chemical space, with a focus on discovering new hybrid perovskite materials for photovoltaics and LEDs. Based on our previous works combining high throughput synthesis and machine learning, our team has set up a robotic platform combining automated chemical synthesis with automated optical characterizations (platform funded by the PEPR DIADEM).
In this context, the objective of the PhD student will be to discover new photoluminescent hybrid perovskites for photovoltaics and LEDs using this platform. Firstly, the large chemical system of hybrid metal halides will be explored using different metals, halogens, and amines. The syntheses will be carried out in solution using our robotic platform coupled with exploration algorithms developped by collaborators in Université de Strasbourg. The optical properties (absorption and steady-state photoluminescence) will be characterized in high-throughput manner using spectrofluorimeter equipped with a microplate reader. This experimental work will be carried out in close collaboration with experts in machine learning in order to implement exploration based search of the hybrid metal halide chemical system. The crystal structures of the most interesting candidates will be characterized by single-crystal X-ray diffraction and solid-state NMR. The origin of the luminescence in such materials (defect, doping, self-trapped exciton) will be investigated using different spectroscopic techniques (time-resolved PL, Raman, IR, UV-Vis absorption). The most efficient phosphors will be selected and phosphor converted LEDs will be designed as a proof of concept showcasing the power of autonomous, exploration-driven material discovery.
Candidates must hold a Master's degree in chemistry or materials science with experience in the synthesis and characterization of inorganic / hybrid materials. Candidates should have a strong interest in the synthesis of new inorganic materials and the characterization of optical properties. Experience in machine learning is not required but is a plus. In addition, the candidate should be independent and have good communication skills (good oral and written English).

Your Work Environment

The Institut des Matériaux de Nantes Jean Rouxel (https://www.cnrs-imn.fr/) brings together more than 150 researchers and doctoral students. Through the design and characterization of new materials, the laboratory's approach aims to optimize a wide range of properties for applications such as photovoltaic cells, fuel cells, batteries for electric vehicles, nanotechnologies, and optical materials like LEDs. The MIOPS team, where the work will be conducted, specializes in the synthesis and characterization of inorganic and organic-inorganic hybrid materials with optical, optoelectronic, or magnetic properties. The contract is funded by the PEPR DIADEM.

Constraints and risks

Travel for meetings, conferences, and experiments will also be required.

Compensation and benefits

Compensation

2300 € gross monthly

Annual leave and RTT

44 jours

Remote Working practice and compensation

Pratique et indemnisation du TT

Transport

Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€

About the offer

About the CNRS

The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.

CNRS

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