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Advertising division: PGI-9 - Semiconductor Nanoelectronics
Reference number: 2020D-020


The combination of optical components with electronics on the same microchip can potentially solve the bandwidth bottleneck in modern computers and allow devices with decreased power consumption. Sadly, silicon (Si) and germanium (Ge), the materials underpinning the whole digital world, lack the capability to efficiently emit light. A few years ago, alloying Ge with another group IV material tin (Sn) has been proven in our group to allow the formation of a direct bandgap material, prerequisite for any optoelectronic device. First characterizations proved optically-pumped lasing at cryogenic temperatures, as well as electrically-induced emission from light emitting diodes (LEDs), however, not suitable for real-world applications yet. Recently, we have been working on the introduction of heterostructures, which potentially allow more efficient light emission at elevated temperatures. Further information on the research field can be found under:

We are offering a

PhD position - Group IV-based Si-Ge-Sn light Emitters

Your Job:

  • Fabrication and characterization of photonic devices, such as light emitters (LEDs, lasers) and photodetectors for their integration into a simple optical link
  • Analysis of optical properties by a variety of spectroscopy techniques, for example photoluminescence, electroluminescence and absorption methods
  • Fabrication and investigation of nano-structured devices, previously manufactured in the cleanroom of the Helmholtz Nano Facility (HNF)
  • Interaction with other group members, working on epitaxy and electronic material characterization for continuous material improvement
  • Collaboration with international partner groups regarding electronic bandstructure calculations, device simulations and specific characterization techniques

Your Profile:

  • Master degree in physics (or similar), ideally with a background in the field of semiconductor physics
  • Knowledge in optical spectroscopy techniques is beneficial
  • First experience in clean room processing is helpful
  • Very good skills in spoken and written English

Our Offer:

  • An interdisciplinary and international work environment at the well-recognized Peter-Grünberg-Institute - Semiconductor Nanoelectronics at the Forschungszentrum Jülich
  • An outstanding scientific infrastructure including several laboratories and a state-of-the-art clean room
  • Possibility to pursue the doctoral degree from the RWTH Aachen
  • A time-limited contract for the duration of three years
  • Continuous scientific mentoring by your scientific advisor
  • Participation in overarching seminars including certificate
  • Further development of your personal strengths, e.g. via a comprehensive further training programme
  • Pay in line with 65 % of pay group 13 of the Collective Agreement for the Public Service (TVöD)
  • Information on employment as a PhD student at Forschungszentrum Jülich can be found here

Forschungszentrum Jülich promotes equal opportunities and diversity in its employment relations.

We also welcome applications from disabled persons.

Additional Information

The job will be advertised until the position has been successfully filled. You should therefore submit your application as soon as possible. We look forward to receiving your application via our

Questions about the vacancy?
Contact us by mentioning the reference number 2020D-020:
Please note that for technical reasons we cannot accept applications via email.