Master projects

The M2N group welcomes Master students from Chemical Engineering and Chemistry, Applied Physics, and Sustainable Energy Technology at the TU/e to perform their graduation projects. For general information on our research program and possible topics for your graduation project, please contact René Janssen. Some examples of current openings for projects are provided on this page, but we will be happy to discuss other options with you to tailor your project to your wishes and talents. On our research page you can get an impression of the various research topics and projects that we address within M2N.

Redox flow batteries
You will be developing new molecules for used in non-aqueous organic redox flow batteries. In redox flow batteries the redox active species are dissolved or suspended in a solvent with supporting electrolyte forming an anolyte and catholyte. The molecules you will make are amphoteric and composed of electron deficient diketopyrrolopyrrole (DPP) groups in combination with electron rich aryl groups. This allows the material to be used as anolyte and as catholyte. Your project involves the design new DPP derivatives that show stable redox behavior and good solubility in polar organic solvents. By modifying the aryls with various groups such as substituted phenylene and thiophene moieties, you will investigate their impact on redox properties and cycling stability. The amide groups of the DPP core can be functionalized with quaternary ammonium groups or oligo ethylene glycol chains to facilitate solubility in the polar solvents used in flow batteries. This research is a close collaboration between the TU/e and DIFFER (Dutch Institute for Fundamental Energy Research).
For more information contact: Koen Hendriks or René Janssen

Proximity orbital and spin-orbit effects of WSe2 on bilayer graphene
Heterostructures of two-dimensional materials can fundamentally alter their properties due to proximity effects. For example, graphene or transition metal dichalcogenides can serve as a new platform for opto-spintronics, promoting graphene towards applications. In this project you will study the band structure of this heterostructure with microARPES, angular resolved photoemission, STM and optical techniques to measure the relevant valence electron states and in particularly the spin-orbit split states, trying to understand the electric field spin-orbit effect.
For more information contact: Kees Flipse

Polaritons in molecular crystals of TCNQ
TCNQ (tetracyanoquinodimethane) is an organic molecule that crystallizes easily and shows a very strong optical transition in the visible region. The strong optical reflection band of TCNQ shows minima associated with polaritons, quasi particles that arise from the strong coupling between electromagnetic waves with electronic polarization and excitation waves of the molecules. However detailed characterization of the reflection as function of the angle of incidence and for various natural facets of the crystals is lacking. Also an interpretation of the spectra in terms of the crystal structure and its polaritons is still missing. In this project you study polaritons in TCNQ crystals by means of variable angle reflection measurements. The project involves growing and characterizing the crystals as well as interpretation and modelling of the results using existing software for calculation of the polariton reflection as function of frequency, crystal structure, and orientation.
For more information contact: Stefan Meskers

Scanning tunneling microscopy/spectroscopy (STM/STS) on graphene nano ribbons
In this project you will use scanning tunneling microscopy to study the morphology and local electronic structure of graphene nano ribbons, in particular the edge regions. The results will be compared with dedicated electronic structure calculations in which strain effects are also taken into account. In this way we try to understand the spin-polarized signatures of these ribbons.
For more information contact: Kees Flipse

Understanding electron-hole recombination in Perovskite solar cells via time-resolved electroluminescence
In efficient solar cells only radiative electron-hole recombination should take place. Therefore efficient solar cell should also be an efficient light-emitting diode, but in practice this has not yet been achieved because trap states exist that enable non-radiative recombination. By applying a pulsed voltage with voltage peaks exceeding the bandgap of the perovskite semiconductor, pulsed electroluminescence can be observed. By varying the time average bias voltage it was also found that trap states remain filled when the bias exceeds ~ +0.5 V suggesting that the trap states are positioned well below the band edges of the semiconductor. In the project you will estimate the lifetime of the trapped carriers by varying the time that the diode is kept at low bias voltage that is not sufficient to keep the deep traps filled. By varying also the temperature, the activation barrier for release of the carriers from the traps can be determined. This activation energy should correspond to the depth of the traps.
For more information contact: Stefan Meskers