Offres d’emploi

IPVF Post-doc: Development of Tunnel Junctions for Tandem Solar Cells

Contract type: COD

Starting date: ASAP

Duration: 36 months

Working Place: Palaiseau

Education: BAC+8

Salary: Profil-dependant

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.

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

IPVF has launched the ambitious Program II for the development of tandem Silicon/perovskite (c-Si/PVK) solar cells. This technology appears to be one of the best solutions to increase the efficiency of PV panels by combining a well-known and optimized silicon solar cell with a high band gap thin film solar cell. Because of their tunable band gap and high efficiency, perovskite solar cells are a perfect top cell to be used in a tandem configuration. Among the several challenges raised by such architectures, the access to an efficient tunnel junction at the interface of the c-Si and perovskite solar cell stacking is essential in 2-terminal (2T) tandem.


The Postdoctoral Researcher will benefit from a multidisciplinary environment, IPVF expertise and have access to IPVF unique capabilities.


Main missions

The candidate will directly report to the Deputy Programs Director of IPVF.

She/he will integrate a dynamic and talented team driven by innovation and results.


Within the Program II, the postdoctoral researcher will be in charge of:

  • Developing tunnel junctions (nc:Si:H, polySi, a:Si:H, µc-SiOx…) by PECVD and/or ALD on suitable c-Si solar cells.
  • Characterizing the developed junctions (electrically, chemically).
  • Implementing processes for various c-Si technologies (HJT, PERC, IBC…)
  • Contributing to the surface preparation of the c-Si (chemical polishing…).
  • Supplying prepared samples to the perovskite team for 2T tandem device fabrication.


As an expert of c-Si technology for photovoltaics (PV), the candidate will also strongly contribute to the success of the other research and technological programs of IPVF that include c-Si solar cells by:

  • Contributing in the benchmark of existing c-Si technologies for internal needs (prototyping, market studies, integration in modules…).
  • Supporting the existing activities in edge passivation of c-Si.
  • Acting as the technical support in collaboration with key industrial and academic players.
  • Providing expertise on chemical surface polishing for other activities.

Sought profile


      • Vacuum deposition.
      • c-Si technology in PV.
      • Advanced characterization.


  • Hands-on experience with PECVD and ALD.
  • Proficiency in c-Si devices in PV.
  • Knowledge of Origin, Excel.
  • Communication of results.

Self-management skills

      • Curious and enterprising.
      • Autonomous.
      • Organizational and collaborative skills.
      • Results-oriented.


Cover letter and CV to be sent to:, and
Specify the title and reference of the offer in the subject line of the email