CNRS Internship – Modelling of the Modulated Photoluminescence signal and it’s dependence to temperature


Function: Master student

Contract Type: Internship

Starting Date: March 2022

Working Place: IPVF & GeePs

Duration: 5-6 months

Education: Master 2




The internship will be a collaborative work shared between the IPVF-UMR and the GeePs laboratories.

The IPVF-UMR is an academic joint research unit associated with IPVF .

The GeePS laboratory is a joint research unit shared between CNRS/University Paris-Saclay/Sorbonne University and specialized in the electrical and opto-electrical characterization. Both Labs works together in the frame of the IPVF program for advanced characterization.

IPVF – Institut Photovoltaïque d’Île-de-France, is a global Research, Innovation and Education center, which mission is to accelerate energy transition through science & technology.
Gathering industrial PV leaders (EDF, TotalEnergies, Air Liquide, Horiba and Riber) and world-renowned academic research organizations (CNRS, Ecole Polytechnique), multi-disciplinary and international IPVF teams conduct research for clean energy technologies. Supported by the French State, IPVF is labelled Institute for Energy Transition (ITE).


IPVF at a glance:
• An ambitious Scientific and Technological Program (6 programs divided in 24 work packages): from tandem solar cell technologies to economy & market assessment, state-of-the art characterization, photocatalysis and breakthrough concepts.
• State-of-the-art technological platform (8,000m²): more than 100 cutting-edge equipments worth €30M, located in cleanrooms (advanced characterization, materials deposition, prototypes for fabrication, modelling…).
• High-standard Education program (M.S. and PhD students).





GeePs and IPVF work together to the development of advanced characterization tools, based on Photoluminescence. They daily use the time resolved method (TRPL) and develop an alternative based on modulated regime. Semiconductors layers are lighted by an intensity time-modulated laser with variable frequency and one measure the strength and the phase shift of the PL versus excitation at the same frequency.  The Intern will have to study analytically and numerically the PL modulated experiment when varying the temperature. This should allow to extract parameters such as carrier lifetime, electronically active defects (densities and energy level in the bandgap).




The Intern will have to :

  • Read articles dealing with MPL.
  • Use a Matlab code developed at the UMR-IPVF (and modify it) to study the effect of temperature on MPL signals and deduce tendencies.
  • Modify an existing routine using a commercial simulation software based on finites volumes to compare with experimental results.





  • Semiconductor physics
  • Solid State Physics
  • English B1




  • Matlab
  • C++



  • Self-organized
  • Good interactivity with the two teams




Cover letter and résumé tobe sent to: and

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