CNRS Internship – Interface Engineering in Mixed Halide Perovskite Solar Cells


Function: Master student

Contract Type: Internship

Starting Date: February/March 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).





Halide perovskite solar cells have shown outstanding progress in performance in recent years, exceeding power conversion efficiency of 25%, thus promising to be a strong competitor for the current silicon solar cell technology. Limits to this trend originate from the non-radiative recombination of electrons and holes as the dominant loss processes in photovoltaics. This phenomenon originates from defect states that arise from imperfections of crystal lattice , particularly at the interfaces of photovoltaic devices. Remarkably, the quality of the perovskite film as the light-harvesting materials has been improved to such a high level with accordingly long carrier diffusion lengths that recombination in the bulk of perovskite layers does not significantly limit the functionality of the device. Therefore, the study of the defects states at the surface and at the interfaces in the layer stack has advanced to the center of attention. If we want to reach a higher level of efficiency in solar cells, interface engineering is the main domain that should be focused.




The main target of this internship project is to implement various interlayers between the perovskite absorber layer and charge transport layer to tailor the energy level of mixed halide perovskite solar cells and improve device performance with a focus on the p-i-n device architecture. The internship will focus on the fabrication of perovskite solar cells via solution and vacuum deposition methods. Furthermore, the study will comprise the  electrical and optical characterization (XRD, J-V, EQE, etc.) of the thin-films and devices to investigate and understand the impact of the interlayer on the cell performance and stability.




  • Master 2 in Physics or Chemistry or related fields
  • Analytical & systematic scientific approach
  • Communication skills in English (oral & written)
  • Collaborative spirit / Team player
  • Ability to work independently
  • Curiosity for semiconductor physics
  • Previous experience in photovoltaics device fabrication and characterization is a plus




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