IPVF Internship – Graphene assisted III-V substrate recycling: towards low-cost high-efficiency solar cells


Function: Master student

Contract Type: Internship

Starting Date: Beginning 2022

Working Place: Palaiseau, France (Paris-Saclay technology cluster)

Duration: 6 months

Education: Master 2




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, 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).





Solar cells made of III-V materials present the best efficiencies among currently available technologies, up to 46% under concentration. Nevertheless, their cost is significantly higher than mainstream silicon modules. The major part of this cost, about 80% to 90%, lies in the III-V substrates necessary for the growth of monocrystalline materials with sufficient quality.

We are exploring new strategies to reuse the substrate for several consecutive growths, in order to drastically reduce its cost contribution. The main goal is to modify the surface of the III-V substrate, so that the fabricated III-V layers can be easily detached, leaving a clean surface suitable for subsequent layer fabrication. A promising route for surface modification, called remote epitaxy, consists in depositing graphene layers on top of the substrate. It was shown that graphene does not prevent the fabrication of monocrystalline materials, while allowing their exfoliation. Developing this method requires exploring fundamental physical phenomena as well as defining practical methodologies. The complete process is depicted in the figure below.

Websites: https://www.ipvf.fr, https://sunlit-team.eu, https://www.c2n.universite-paris-saclay.fr




The intern will work on the development of graphene transfer methods. He will propose and investigate improvements of the techniques already existing at the laboratory, and characterise the obtained substrates. Those will be used by the team for the epitaxy. The intern will then take part in the characterisation of the fabricated III-V epi-layer. In particular, we will address the fundamental problem of preparing and preserving an epi-ready III-V surface during the graphene transfer.

This work will be done in close collaboration between the IPVF and the Center for Nanoscience and Nanotechnologies (C2N, SUNLIT team). It will take advantage of a unique collection of fabrication and characterization methods (XPS, electron microscopes, luminescence) available in partner laboratories, giving the intern various opportunities to tackle this project challenge and gain experience.





  • Master 2 in Physics, Material sciences, engineering or related.
  • Physics of semiconductors / solid-state physics


  • Cleanroom experiences is a plus
  • Strong experimental and analysis skills


Self-management skills

  • Good organization skills (to fabricate the target materials, using methods implying numerous parameters, in a clean room environment).
  • Self-decision making and process improvement suggestions are expected.
  • Collaborative work being at the core of the program, communication skills are required for team working as well as regular presentation of work progress in internal meetings.




Cover letter, CV and last academic transcripts to be sent to: amaury.delamarre@c2n.upsaclay.fr

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
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