Ultrafast laser spectroscopy on excitons and charges in 2D materials for optoelectronic applications

Updated: 5 months ago
Deadline: 15 Oct 2022

Ultrafast laser spectroscopy on excitons and charges in 2D materials for optoelectronic applications
Ultrafast laser spectroscopy on excitons and charges in 2D materials for optoelectronic applications
Published Deadline Location
yesterday 15 Oct Delft

Job description

The project involves fundamental studies on charge carriers, excitons, trions and larger many-body complexes in ultrathin 2D Layered Metal-Chalcogenide Semiconductors and Topological Insulators. The results are of interest for optoelectronics and quantum information processing. We focus on processes that are relevant for highly efficient solar cells, photocatalysis or quantum information processing (spintronics, valleytronics).

You will carry out femtosecond pump-probe laser spectroscopy to study the dynamics of charges, excitons, trions etc. in 2D semiconductors MX2 (M = Mo, W, Re, Zr, or Hf and X = S, Se or Te) and Topological Insulator nanosheets (e.g. Bi2Se3). Using optical and terahertz conductivity measurements you will characterize the formation, mobility and decay kinetics of charges, excitons. trions etc. Particular attention will be paid to production of two or more electron-hole pairs for the absorption of a single photon via a process known as carrier multiplication (CM). CM can significantly enhance the efficiency of solar energy conversion.

The project has a duration of 21 months and is carried out in collaboration with prof. Peter Schall at the University of Amsterdam and Toyota Motor Europe in Brussels.     

  • max. 40 hours per week
  • €2960—€4670 per month
  • Delft View on Google Maps

Delft University of Technology (TU Delft)


PhD degree and experience with time-resolved laser spectroscopy

Conditions of employment

Fixed-term contract: 1 year and 9 months.

You will be appointed on a contract for 21 months. Your salary is in the range € 2.960,- to € 4.670,- per month. Benefits are in accordance with the Collective Labour Agreement for Dutch Universities.

The TU Delft offers a customisable compensation package, a discount on health insurance and sport memberships, and a monthly work costs contribution. Flexible work schedules can be arranged.

For international applicants we offer the Coming to Delft Service and Partner Career Advice to assist you with your relocation. An International Children's Centre offers childcare and there is an international primary school.

Delft University of Technology

Delft University of Technology is built on strong foundations. As creators of the world-famous Dutch waterworks and pioneers in biotech, TU Delft is a top international university combining science, engineering and design. It delivers world class results in education, research and innovation to address challenges in the areas of energy, climate, mobility, health and digital society. For generations, our engineers have proven to be entrepreneurial problem-solvers, both in business and in a social context. At TU Delft we embrace diversity and aim to be as inclusive as possible (see our Code of Conduct ). Together, we imagine, invent and create solutions using technology to have a positive impact on a global scale.

Challenge. Change. Impact! 


With more than 1,000 employees, including 135 pioneering principal investigators, as well as a population of about 3,400 passionate students, the Faculty of Applied Sciences is an inspiring scientific ecosystem. Focusing on key enabling technologies, such as quantum- and nanotechnology, photonics, biotechnology, synthetic biology and materials for energy storage and conversion, our faculty aims to provide solutions to important problems of the 21st century. To that end, we train students in broad Bachelor's and specialist Master's programmes with a strong research component. Our scientists conduct ground-breaking fundamental and applied research in the fields of Life and Health Science & Technology, Nanoscience, Chemical Engineering, Radiation Science & Technology, and Engineering Physics. We are also training the next generation of high school teachers and science communicators.

Additional information

For more information you can contact prof. dr. L.D.A. Siebbeles via e-mail: l.d.a.siebbeles@tudelft.nl. See also: https://www.tudelft.nl/tnw/over-faculteit/afdelingen/chemical-engineering/principal-scientists/laurens-siebbeles/laurens-siebbeles-group

Working at TU Delft

Join the oldest and largest technical university in the Netherlands. Work on clever solutions for worldwide challenges, to change the world and make an impact. Ready to bring your energy to our research?

Challenge, change, impact!

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Application procedure

Please send a motivation letter, CV, list of publications and letters of recommendation to prof. dr. L.D.A. Siebbeles, e-mail: l.d.a.siebbeles@tudelft.nl. Closing date: as soon as a suitable candidate has been found.   

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