Responsable : James Utterback
Contact : james.utterback@insp.upmc.fr
Tutelle : Sorbonne Université - CNRS
Mots clés : Experimental et Stage M2
Gratification : Oui
Page des stages de(s) l'équipe(s) : Physico-chimie et dynamique des surfaces  
Description du stage

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Motivation:

The aim of this project is to develop a pump-probe optical method to spatiotemporally study microscopic electronic transport and dynamics in nanocrystal-based optoelectronics devices. Electrical transport across nanoscale interfaces is fundamental to the functionality of optoelectronic devices. While advanced spectroscopic methods such as ultrafast spectroscopy grant an understanding of excited-state dynamics in isolated materials [1], many physical questions about the microscopic nature of charge transport within devices remain underexplored. Our approach is to apply pump-probe microscopy and fabricate nanocrystal-based photovoltaics and phototransistors amenable to optical microscopy in order to probe carrier transport at active optoelectronic interfaces.

The internship: During the timeframe of the internship, the student will build a pump–probe optical microscope, develop a data acquisition program using LabView, perform sample fabrication, and perform benchmark experiments on the instrument. Time permitting, the student will also use this state-of-the-art instrument to spatiotemporally measure the microscopic charge transport characteristics of an advanced material such as a nanocrystal-based system of interest. If the student continues on to do a PhD, they would carry this project on to the next stage of performing these spatiotemporal measurements on nanocrystal device configurations.

Student background and learning: The student will gain expertise in optics, microscopy, spectroscopy, data acquisition in LabView, data analysis and nanoscience. Students with background in the above areas are preferred. The group being international, the applicant must speak English.

Keywords: Experimental, Spectroscopy, Optics, Energy

[1] Delor et al. Nature Materials, 2020, 19(1), 56.
[2] Utterback et al. Nano Letters, 2021, 21(8), 3540.