Description du sujet de thèse

Pump-Probe Spectroscopy of Energy Carrier Transport in Nanocrystal Optoelectronics

The aim of this project is to use a pump-probe optical microscopy method to spatiotemporally study microscopic charge and thermal transport and relaxation dynamics in nanocrystal-based optoelectronics systems. Energy carrier transport at the nanoscale is fundamental to energy conversion applications. While advanced spectroscopic methods grant an understanding of excited-state dynamics in isolated materials, many physical questions about the microscopic nature of transport in optoelectronics devices remain underexplored. To address this area, one needs a probe of local charge transport with sub-nanosecond time resolution and sub-micron spatial resolution in a material in realistic device conditions. Our approach is to do ultrafast microscopy and fabricate nanocrystal-based optoelectronics. These studies aim to reveal microscopic structure–property relationships that connect nanoscale carrier dynamics to macro-scale energy conversion.

We are searching a student with a background in colloidal semiconductor nanocrystals and pump–probe microscopy.

Contexte de travail

The thesis will be supervised by Dr. James Utterback, CNRS Research Fellow at the Institut des Nanosciences de Paris (INSP, UMR 7588). The work will take place at INSP. The student would also benefit from the environment of the Chemical Physics and Dynamics of Surfaces team, whose expertise spans nanocrystal synthesis, characterization, and spectroscopy. The lab at INSP benefits from facilities needed for nanocrystal synthesis, characterization, and a clean room for fabrication.

This doctoral project is part of an ANR-funded project.