Further growing number of members within the Research Department

The Research Department would like to welcome three new members within the community of scientists of the RD Plasma. Two well-known members of the RUB also join the Research Department with their expertise, Prof. Dr. Martin Hoffmann (Microsystems Technology) and Prof. Dr. Nils Metzler-Nolte (Bioinorganic Chemistry). Furthermore, a new member of the RUB at the institute for astro physics, the ERC Grant awardee Prof. Dr. Hendrik Hildebrandt enlarges the group of members within the Research Department.


New PIs within the Research Department

During the last general meeting of the Research Department Plasmas with Complex Interactions, new Senior PIs were elected to join the collaboration of different scientists over the campus. Due to changed cooperations, the group was enlarged by four new Senior PIs: Prof. Dr. Martin Muhler from the chair for technical chemistry, Jun.-Prof. Dr. Dirk Tischler from the chair for microbial biotechnology, and Dr. Julian Schulze as well as Jun.-Prof. Andrew Gibson from the chair for electrical engineering and plasma technology.

With the coming into force of the new by-laws, the Research Department Plasmas with Complex Interactions now includes Associated PIs from other universitites, who work together with the scientists on campus. Here, the new memebers are: Prof. Dr. Jan Benedikt from the chair for plasma physics at the CAU Kiel, Prof. Dr. Guido Grundmeier from the chair for technichal and macomolecular chemistry at the university of Paderborn, Prof. Dr. Timo Jacob from the Insitute for Electrochemistry at the Uni Ulm, Prof. Dr. Thomas Mussenbrock from the chair for theoretical electrical engineering at the BTU Cottbus Senftenberg, Prof. Dr.-Ing. Jens Oberrath from the institute for product and prozess innovation at the Leuphana Universität Lüneburg, Prof. Dr. Beatriz Roldán Cuenya from the institute for Interface Science at the Fritz-Haber-Institut Berlin, Prof. Dr. Jochen M. Schneider from the chair for material chemistry at the RWTH Aachen, and finally Dr.-Ing. Jan Trieschmann from the chair for theoretical electrical engineering at the BTU Cottbus.


Plasma Day 2019

The next Plasma Day will be on September 30th, 2019. Please mark this date in your calendar.


Active exchange with international scientists continues at TP4

The very steady exchange between scientists from all over the world with the group around PD Dr. Horst Fichtner continues also at the end of 2019. Moreover, already for 2019, a visit for 2019 is planned.

(1) Between 17.11. and 7.12.2018, Prof. Sean Oughton  from the Univeersity of Waikato, Hamilton, New Zealand visits the group. His research Topic is Turbulence Evolution in the Heliosphere.

(2) Dr. Dieter Nickeler with his research topic hydrodynamical flows in circumstellar environments spends two weeks at Bochum (2.12.-15.12.2018). He is from Astronomický ústav, Akademie věd České republiky, Czek Republic.

(3) Finally, the regular exchange with Prof Yuri Litvinenko from Univeersity of Waikato, Hamilton, New Zealand continues: he visits the group of PD Dr. Fichtner between 5.12. and 19.12.2018 as well as between 8.1. and 25.1.2019. With him, the focus in the scientific exchange is about nonlinear diffusion.

Young researchers activity

Bochumer young researchers at WELTPP-21

The annual workshop on the exploration of low-temperature plasma physics (WELTPP) was held on the 29th & 30th of november for the 21st time in Rolduc, Kerkrade. PhD students from both the SFB TR-87 and the CRC1316 contributed to the program with 6 talks and 9 posters. In addition to the student talks, Erik Neyts from the University of Antwerp gave an invited talk  about the surface charge in plasma catalysis.

Scientific Highlights

Ultra-thin transparent silver layers for solar cells

A new fabrication process for transparent ultra-thin silver films has been developed by researchers at Ruhr-Universität Bochum and the University of Wuppertal. The material may help build highly efficient solar cells and light-emitting diodes. However, traditional chemical methods have not been able to produce ultra-thin and pure silver films. A team headed by Professor Anjana Devi and Nils Boysen from the Bochum-based research group Inorganic Materials Chemistry, in collaboration with the group of Professor Thomas Riedl from the Chair of Electronic Devices in Wuppertal, published an article on a new synthesis method in the journal “Angewandte Chemie”. The article was published online on 27 September 2018.

New precursor chemistry

“Precursors for the fabrication of ultra-thin silver films are highly sensitive to air and light,” explains Nils Boysen. The silver precursors can be stabilised with fluorine, phosphorus or oxygen. “However, these elements contaminate the thin films as well as the equipment used for the production,” continues the researcher. In the course of his Master thesis, Boysen and his colleagues developed an alternative solution to tackle the problems associated with common silver precursors.

The researchers created a chemical silver precursor, where the silver is surrounded by an amide and a carbene, which is even stable without elements like fluorine, phosphorous or oxygen. They demonstrated that a silver thin film can be applied to an electrode with the new precursor by atomic layer deposition. In the process, the gaseous precursor is transported to the electrode and a silver film is deposited there as a layer with a thickness of merely a few atoms. Because it is so thin, the silver film is transparent.

“As the process can be operated under atmospheric pressure and at low temperatures, the conditions for industrial production are quite favourable,” says Anjana Devi.

A chance for highly efficient solar cells and lights

Following a series of tests, the researchers showed that the thin silver films manufactured using this method are pure and electrically conductive. “As far as process technology is concerned, the successful synthesis of the new precursor paves the way for the development of ultra-thin silver films,” concludes Thomas Riedl. “It constitutes a first step towards the production of novel electrodes for highly efficient solar cells and lights.”

“The collaboration between the chemists from Bochum and the engineers from Wuppertal was the key to success,” stresses Anjana Devi.

Research Department Plasmas with Complex Interactions

Plasma Day 2018

On Monday, November 12th, 2018, the Plasma Day of the Research Department Plasmas with Complex Interactions took place. The focus of the Plasma Day was the strategic progress of the Research Department in the future. The spokesperson, Achim von Keudell, spoke about the current situation of the Research Department. Further, representatives of all three topic fields of the Research Department presented their progress and future perspective. Moreover, highlight presentations were given by Jens Kleimann from the physics faculty, Andrew Gibson and Julian Schulze from the electrical engineering department.





Conference participation

Poster Prize at the 8th International Workshop on Plasma Spectroscopy in Oxford

The 8th International Workshop on Plasma Spectroscopy was held from the 23-26th of September, 2018 at the Worcester College in Oxford, UK. Volker Schulz- von der Gathen, Patrick Preissing and Katharina Grosse from EP2 contributed with 2 talks and 3 poster presentations. One of two poster prices were won by Patrick Pressing which was announced during the conference dinner. The excursion to Blenheim Palace was a highlight of the conference next to the excellent scientific programme.