Missions

π-conjugated organic materials are molecular systems whose potential for optoelectronic applications (emission, transport, and energy conversion) is now firmly established. Their versatility—arising from advanced structural design, flexible synthetic methods, and tailored organization—continues to open new perspectives. These innovations promote novel photophysical effects, which not only raise fundamental scientific questions but also pave the way for the optimization of next-generation devices. In this context, the successful candidate will investigate model conjugated polymers (in particular polydiacetylene) in newly engineered forms: either assembled into tubular structures or incorporating stabilized free radicals. The aim will be to elucidate how these functionalization strategies impact excited states and their dynamics, with a focus on phenomena such as exciton fission mechanisms (and their relationship to transport along the polymer chain) and the emergence of magneto-optical properties.
The candidate will actively contribute to both the preparation of materials and the development of support systems for experimental studies. They will also conduct spectroscopic investigations, primarily based on optical spectroscopy techniques, including absorption and emission (steady-state and time-resolved), micro-photoluminescence (at low temperature and under high magnetic field), and, where appropriate, photoinduced absorption spectroscopy (using the laboratory's new platform or in collaboration with specialized partner teams).

Activités

• Collaborate with the team of partner chemists, providing feedback and contributing to the optimization of materials and protocols.
• Participate in the preparation of study materials (crystals) from precursor monomers (note: established protocols are provided) and monitor their structural characterization.
• Conduct basic optical characterizations of the materials.
• Perform lithography and fabricate microstructures in the cleanroom facilities at INSP.
• Carry out advanced optical spectroscopy, including micro-photoluminescence, magneto-luminescence, and, depending on expertise, photoinduced absorption experiments in pump-probe configuration.
• Interact with the project's theoretical group as appropriate, contributing to the integration of experimental and computational insights.

Compétences

The candidate must hold a Doctorate in Physics or physical Chemistry, with a good knowledge of semiconductors (including organic semiconductors) and, more broadly, of the electronic properties of condensed matter or molecular systems. Solid experience in optical spectroscopy, including microscopy-based techniques (micro-photoluminescence) and time-resolved experiments (pump-probe configurations) are also required. Experience in microfabrication and/or proficiency in interfacing techniques is highly desirable.

Contexte de travail

The INSP (Institut de Nanosciences de Paris) is a joint research unit of CNRS and Sorbonne University, located in the heart of Paris on the Jussieu campus. The institute hosts approximately 200 staff members, including researchers, engineers, PhD students, and postdoctoral fellows. Teams at INSP have access to numerous shared facilities, including a cleanroom and an ultra-fast optics laboratory (under development). The project will be conducted within the “Photonics and Spin Coherence” (Phocos) group. The candidate will have access to two fully operational micro-spectroscopy platforms specific to the team, one of which allows experiments under magnetic fields (0–5 T), as well as all the necessary facilities for preparatory work, including material development and basic optical characterization. The work will be carried out in close interaction with Phocos' theoretical group. Any experimental developments will also benefit from the support of a cryogenics engineer experienced in collaborative projects.
The project is funded by the Agence Nationale de la Recherche (ANR Radpolym) for a duration of 12 months.

Contraintes et risques

None.

Informations complémentaires

None.