Open positions

On this page you will find six different Ph.D positions advertised. The page starts with a description of your profile, what we offer, and things that should be included in your application pack. At the end of this page, is a description of each position and a link to apply for it.

**Please indicate in the motivation letter if you have applied to more than one position.**

Profile

  • Master degree in Physics, Materials Science, Chemistry (or equivalent) with excellent grades
  • Self-motivated, committed and curious
  • Creative and able to think independently
  • Excellent command of English

Offer

  • Exciting topic in the context of solar energy
  • Friendly international team
  • Modern, well equipped laboratory
  • Committed supervisor
  • Competitive remuneration 

Candidates should submit the following documents in English (incomplete dossiers will not be considered):

  • Motivation letter
  • Curriculum vitae, incl. publication list
  • Copies of diplomas, including grade reports and transcript of courses taken (simple copies and/or unofficial translations are fine for the moment)
  • List of references complete with contact information

Positions

Thin film micro-solar cells for high efficiency applications (50014118)

The candidate will be responsible for the electrodeposition and annealing of thin film semiconductor layers to form individual micro-solar cells for light concentration applications. The candidate will also be responsible for semiconductor layer and solar cell characterization. This is position A from the PACE Doctoral training unit which focuses on high power conversion efficiency applications. The work will be in collaboration with the INL. Prior experience of any of the following: electrochemistry, thermal annealing, structural, or opto-electronic characterization is advantageous. Email phillip.dale@uni.lu for more information. To apply for this position follow this link.

Activities
  • Synthesis of Cu(In,Ga)Se2 absorber layers for micro-solar cells
  • Characterization of absorber layers and devices
  • Collaborate within PACE and with INL
  • Publications in international journals and conferences
  • Writing a thesis
  • Occasional teaching and public outreach

 

 

Advanced characterization of the materials developed for the solar cells (50014120)

Within the doctoral program PACE the successful candidate will conduct correlative optical and electrical characterization of different thin film solar cell technologies such as hybrid perovskites, CIGSe and photo-ferroelectric materials. The candidate will continue to develop a hyperspectral time resolved photoluminescence imaging setup, which allows to extract laterally resolved Quasi Fermi-level spittings, minority carrier lifetimes and bandgaps. This unique setup will be used to study different solar cell materials with an unprecedented precision in order to better understand the limitations of the current solar cell technologies. The Photoluminescence measurements will be supplemented with Kelvin Probe force microscopy in order to correlate the optical properties to electrical properties. Here we use a state of the art UHV SPM system, which allows to extract workfunctions and surface photovoltages with a high degree of reproducibility. The candidate will work in close collaboration with the other PhD students in the doctoral training unit. Moreover, a secondment at HZB Berlin is foreseen where complementary scanning electron microscopy analysis will be carried out. A background in solid state physics, preferably in solar cells or semiconductors is desirable. Email alex.redinger@uni.lu for more information. To apply for this position follow this link.

Activities
  • Develop and carry out Photoluminescence imaging measurements
  • Correlate to high resolution Kelvin Probe Force Microscopy measurements
  • Publications in international journals and conferences
  • Writing a thesis
  • Occasional teaching and public outreach

 

 

Epitaxially grown Sn perovskites (50015137)

The project is one of 19 projects which have been funded within the framework of a German priority program (more information can be found here https://www.perovskite-spp.uni-konstanz.de/spp-2196/).

In collaboration with the University of Siegen and the University of Darmstadt, our project will explore epitaxially grown tin (Sn) perovskites as alternatives to lead (Pb) based materials. We plan to employ epitaxial growth methods to avoid solvents that promote chemical reactions leading to oxidation of Sn and we will characterize these Sn perovskites down to the atomic level. In Luxembourg, Sn based perovskites will be synthesized via Physical vapour deposition and characterized via Kelvin Probe force Microscopy in UHV. The task is to understand the origin of inhomogeneities and the optoelectronic properties of grain boundaries. Moreover, we will apply optimized architectures and use the knowledge from the nanoscopic and microscopic characterizations to fabricate novel Sn based solar cells that are highly efficient and long-term stable.

The project relies on a close collaboration between the three project partners and the student will carry out several secondments in the other groups in order to exchange samples, knowledge and perform additional measurements. For more information: alex.redinger@uni.lu. To apply for this position follow this link.

Activities
  • Growth of epitaxial Sn based perovskites via physical vapour deposition
  • Electrical characterization via Kelvin Probe Force Microscopy in Ultra High Vacuum
  • Optical characterization via Photoluminescence
  • Publications in international journals and conferences
  • Writing a thesis
  • Occasional teaching and public outreach

 

 

Defect physics of semiconductors (50014121)

Defects have a strong influence on the performance of absorber materials for solar cells. The PhD candidate will perform calculations on the spectroscopic signatures of point defects in the thin-film solar cell materials Cu(In,Ga)S2 and Cu(In,Ga)Se2 . This will require the use of existing ab-initio codes based on density-functional theory and on many-body perturbation theory. It will also involve the development of "second principles" methods such as tight-binding (fitted to ab-initio methods in small supercells). A background in theoretical solid state physics is desirable.

Activities
  • Use and Development of electronic structure methods for defect calculations
  • Performing research on the influence of defects on the performance of solar cell materials
  • Publications in international journals and conferences
  • Writing a thesis
  • Occasional teaching and public outreach

 Email ludger.wirtz@uni.lu for more information. To apply for this position follow this link.

 

 

Defect Studies in industry collaboration (50013842)

Together with the industrial partner Avancis the Laboratory for Photovoltaics investigates thin film solar cells, which are more cost efficient than conventional solar cells because they need less material and energy for their production. The successful candidate will perform the opto-electronic analysis of industrial solar cells. A background in solid state physics, preferably in solar cells or semiconductors is desirable. The doctoral candidate will perform research in close collaboration with the industrial partner and under the supervision of Prof. Susanne Siebentritt.

Activities
  • Photoluminescence analysis of industrial absorber layers based on Cu(InGa)(SSe)2
  • Alkali treatment of absorbers
  • Close contact to industrial partner
  • Publications in international journals and conferences
  • Writing a thesis
  • Occasional teaching and public outreach

 Email susanne.siebentritt@uni.lu for more information. To apply for this position follow this link.

 

 

Solar Cells for Tandem applications (50014875)

Thin film tandem solar cells combine a low cost sustainable approach with high efficiencies. At the Laboratory for Photovoltaics we work on novel sulfide semiconductors to be used as a top cell in the tandem structure. The doctoral candidate will develop sulfide solar cells and characterise their electronic structure under the supervision of Prof. Susanne Siebentritt.

Activities
  • Coevaporation of Cu(In,Ga)S2 absorbers
  • Photoluminescence analysis of their electronic structure
  • Study influence of alkalis
  • Publications in international journals and conferences
  • Writing a thesis
  • Occasional teaching and public outreach

 Email susanne.siebentritt@uni.lu for more information. To apply for this position follow this link.