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PHD offer (H/F) - Chiral TADF polymers

This offer is available in the following languages:
Français - Anglais

Date Limite Candidature : jeudi 2 juin 2022

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General information

Reference : UMR6226-JEACRA-005
Workplace : RENNES
Date of publication : Thursday, May 12, 2022
Scientific Responsible name : Jeanne Crassous
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 1 October 2022
Proportion of work : Full time
Remuneration : 2135 euros + travel and family allowances

Description of the thesis topic

The goal of this PhD is to develop chiral Organic Light-Emitting Diodes (OLEDs) based on new chiral dendrimeric and polymeric TADF emitters. It will take advantage of two concepts: i) the thermally activated delayed fluorescence (TADF) and ii) the emission of circularly polarized light (CPL). TADF materials have emerged as a promising alternative to traditional fluorescent and phosphorescent emitters in the field of OLEDs and related optoelectronic devices thanks to their ability to produce high internal quantum efficiencies approaching 100% without using noble metals. Furthermore, CPL is central to a large range of current and future technologies since CP light emitting devices would allow for additional functionalities such as stereoscopic [3D] displays and improved OLED performances. These goals require to make progress in 1) the development of strongly emissive chiral TADF dendrimeric and polymeric materials suitable for integration into device technologies, 2) the study of their photophysical properties, and 3) the production of solution-processed devices.

The main part of the project will be devoted to the synthesis of chiral dendrimeric and polymeric molecules with combining TADF-type emission and chiroptical activity and the study of their photophysical and chiroptical properties (UV-vis absorption, emission, circular dichroism, circularly polarized luminescence) in solution and in the solid state. Applications in solution-processed optoelectronic devices will then be conducted using the materials with optimized properties.

Work Context

This PhD position lies within the framework of a European DN project: TADFsolutions “Adressing the challenges of high-performance solution-processed TADF-based OLEDs using sustainable materials”. Under the co-supervision of Jeanne Crassous and Ludovic Favereau, the PhD will study and perform synthetic chemistry, perform photophysical measurements, study applications in optoelectronic devices, and be in relation with topics in chirality and in physical chemistry. He/ She will be also involved in scientific/soft-skills meetings and in research activities conducted in other laboratories/companies from Europe and associated countries.

Constraints and risks

This PhD position lies within the framework of a European DN project: TADFsolutions “Adressing the challenges of high-performance solution-processed TADF-based OLEDs using sustainable materials”. Under the co-supervision of Jeanne Crassous and Ludovic Favereau,4 the PhD will study and perform synthetic chemistry, perform photophysical measurements, study applications in optoelectronic devices, and be in relation with topics in chirality and in physical chemistry. He/ She will be also involved in scientific/soft-skills meetings and in research activities conducted in other laboratories/companies from Europe and associated countries.

The candidate must have a master's degree in chemistry. The position requires knowledge in chirality, skills in synthetic chemistry (organic and organometallic), purification methods, characterization techniques, spectroscopic tools, data processing software's, a high level of oral and written (French and English required) communication skills, to be able to present at conferences and write articles in scientific publications; flexibility, adaptability, and creativity. We are looking for a PhD fellow who will be able to become fully involved within the project, with a thirst for knowledge, a certain independence of thought and strong motivation to develop scientific skills in chiral materials science, together with soft skills. In addition, the candidate must be able to work within a team on multi-disciplinary projects.

The applicant must have not resided in France (neither have carried out their main activity in the country) for more than 12 months in the 3 years immediately before the recruitment date, unless as part of a procedure for obtaining refugee status under the Geneva Convention.

Applications must include a detailed CV including at least two references (people who may be contacted), a cover letter of one page, a one-page résumé of the dissertation for the Masters, and the grades for the Masters 1 or 2 or the engineering degree; and they should be sent to jeanne.crassous@univ-rennes1.fr

Our Institute is submitted to security conditions (Restricted Research Zone, ZRR).

Additional Information

European DN Funding, TADFsolutions MSCA Project, Grant Agreement No. 101073045, HORIZON-MSCA-2021-DN

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