Mobility and Decay Dynamics of Charge Carriers in One-Dimensional Selenium van der Waals Solid

Abstract: Trigonal selenium is a semiconducting van der Waals solid that
consists of helical atomic chains. We studied the mobility and decay dynamics of
excess electrons and holes moving along the selenium chains. Excess charge carriers
were generated by irradiation of powdered selenium with 3 MeV electron pulses.
Their mobility and decay via trapping or recombination was studied by time-resolved
microwave conductivity measurements as a function of temperature. The mobility of
charge carriers along the Se chains is at least ca. 0.5 cm2·V−1·s−1 at room temperature.
Charges decay predominantly by trapping at defects. The appreciable mobility,
together with the potential for large-scale production of Se wires by liquid exfoliation,
makes this material of great interest for use in nanoelectronics.

Our results of the temperature dependent microwave mobility in 1D selenium got recently published in JPC C.

Congratulations to Joeri Benschop

Joeri succesfully defended his Bachelor thesis „Liquid Exfolation of Antimony“ on the 15th of June.

June 2017: Gerben Bartels, Olivier Kuijpers, and Pien Abbink started their end of year laboratory work on liquid exfoliation of antimony.

May 2017: I have presented my recent findings about liquid exfoliation of Black Phosphorus at the EMRS Spring Meeting in Strasbourg, France.

Speeddating with high school girls

On 19th January I joined a speeddating event organized by VHTO at Rijnlands Lyceum in Wassenaar. I was positively surprised by the girls being very interested in Chemistry, Physics, Biology, and Mathematics. I hope that the girls enjoyed this event as much as I did.

September 2016: I have presented my first results about liquid exfoliation of Black Phosphorus at the Nano GE meeting in Berlin, Germany.

FOM/f fellowship granted

I have been awarded with a FOM/f fellowship to perform research at the Optoelectronic Materials group headed by Prof. L. Siebbeles at the TU Delft. The research project started on the 1st of January 2016.