Huygen Jöbsis

PhD Candidate
Employed since: September 2020
Email: h.j.jobsis@uu.nl
Room: Vening Meinesz-C office 2.08

Research

Research

Metal halide perovskite (MHP) semiconductors, such as methylammonium lead iodide (MAPbI3), have recently received tremendous attention in materials science, as these have yielded high efficiency solar cells, X-ray detectors and LEDs. However, one of the most fundamental material properties of MHPs still remains debated: whether their bandgap is direct or slightly indirect. The nature of the bandgap determines both the light absorption properties and the lifetime of light-generated charge carriers. Both of these properties are important for e.g. the efficiency of a solar cell or the suitability of MHPs to be used as photocatalysts. For this research we aim to reveal the nature of the bandgap and investigate whether this can be manipulated. To do so, we will study the absorption of light and the recombination of charge carriers as a function of temperature and pressure using different optical spectroscopy techniques. Furthermore, we will make a link between the bandgap and the photocatalytic activity of MHPs. Finally, we will study lead-free perovskites, like silver-bismuth double perovskites, as these are less toxic, which is of importance considering its potential application in photocatalysis.

C.V.

C.V.

2020-present
PhD candidate at the Inorganic Chemistry and Catalysis research group of the Debye Institute for Nanomaterials Science at Utrecht University under supervision of dr. E. M. Hutter and prof. B. M. Weckhuysen within the Advanced Research Centre for Chemical Building Blocks Consortium (ARC CBBC). Project title: Revealing the band structure of metal halide perovskites and its implications for photocatalysis.

2018-2020
Master’s degree: Nanomaterials Science at Utrecht University.
Master thesis: Towards heavy metal free quantum dot-based-technologies. On the photoluminescence line broadening and exciton recombination dynamics of CuInS2, and the exploration of a new synthesis route for InP nanocrystals. Under supervision of dr. C. De Mello Donega.

2014-2017
Bachelor’s degree: Chemistry at Utrecht University.
Bachelor thesis: Synthesis of doped semiconductor nanocrystals and self-assembly in 3D superstructures. Under supervision of prof. D. A. M. Vanmaekelbergh.