IPVF Internship: Advanced spectral analysis of hot carriers photoluminescence

Contract type: Internship

Starting date: ASAP (2021)

Duration: 6 months

Working Place: Palaiseau

Education: Master 2 ; Engineer

Salary: Salary grid

IPVF in brief

Become an actor of the Energy Transition by joining a team driven by innovation and impact to address today’s most decisive challenges.

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, Total, Air Liquide, Horiba and Riber) and world-renowned academic research teams (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: from tandem solar cell technologies to economy & market assessment, state-of-the art characterization, photocatalysis and concepts breakthrough.
  • A state-of-the-art technological platform: more than 100 tools, located in cleanrooms (advanced characterization, materials deposition, prototypes for fabrication, modelling…).
  • A high-standard Education program (M.S. and PhD students).

Job context

When high energy photons are absorbed in a material, carriers are photo-generated with a large of kinetic energy above the band edge. In most cases, this excess in energy is quickly dissipated, and carriers form a quasi-thermal distribution at the lattice temperature. However, in some well-tailored devices, it is possible to slow down this relaxation such that carriers form a “hot” distribution instead. Hot carriers have a large span of consequences for the device operation, some negative (hot carriers induced degradation in silicon transistors), some positive (pathway to very high efficiency of solar energy conversion, advanced cooling applications for ICT). Characterizing their properties is thus key to better understand their dynamics and investigate the thermodynamics of energy transfer.

IPVF Research Program involving this internship position: https://ipvf.fr/jean-francois-guillemoles-and-nathanaelle-schneider-introducing-programme-6-proof-of-concept-for-pv-innovation-breakthrough/

Main missions

Our team has developed a strong expertise is the optical characterization of hot carriers through photo-luminescence – ie by monitoring the light emitted upon the radiative recombination of photo-generated carriers. Using advanced analysis of the emitted spectra, it is indeed possible to evaluate quantitatively the temperature and chemical potentials of these carriers. The aim of this internship is to contribute to these measurements, by performing such an analysis on several devices (nano-structured absorbers, perovskite samples…) and to improve the analysis by including additional features to the fitting method, notably to account for phonons dynamics.

Expected profile


  • Basic solar cell physics
  • Basic thermodynamics


  • Optics
  • Matlab, mathematica, or any other relevant software

Self-management skills

  • Curiosity
  • Patience


Cover letter and CV to be sent to : daniel.suchet@polytechnique.edu and hamidreza.esmaielpour@cnrs.fr
Specify the title of the offer in the subject line of the email

Need a direct line?

Feel free to contact us for more information about our offers.

  • +33(0)1 69 86 58 60
  • contact@ipvf.fr