News

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.

Activity for students

Photonik-Akademie at Ruhr-Univesität Bochum and INP Greifswald

From 9 to 14 September, 29 MINT students from Germany and Switzerland were introduced to the application potential of plasma technology. The trip went to the laboratories of the Ruhr University Bochum, the INP Greifswald and the Dortmunder OberflächenCentrum "DOC", to the Fraunhofer IWS project group located there and to Cortronik GmbH in Rostock, an industrial partner. 

This year, the joint academy of the Federal Ministry of Education and Research and the photonics industry was hosted by the Chair of General Electrical Engineering and Plasma Technology of the Ruhr University Bochum and the Leibniz Institute for Plasma Research and Technology e. V. in Greifswald. 

For the students, the schedule was filled to the brim with information and exciting excursions. "I am very grateful for this eventful week," says Academy participant Ediz Herkert, who is studying photonic engineering in the Master's program at the University of Stuttgart. "On the one hand, we got to know the different areas in which plasma technology is used. On the other hand, we had the opportunity to establish contacts with companies and research institutions. The group of participants has also grown into a community during this week. "

Conference Announcement

PT19 in June 2019 in Cottbus

Between 17. 06. and 19. 06. 2019 the traditional plasma technology conference will take place in the premises of BTU in Cottbus.
The conference is organised by project managers in the SFB-TR 87, Prof. Dr. -Ing. Thomas Mussenbrock and Dr. -Ing. Jan Trieschmann from BTU in Cottbus.

Conference report

Three PhD student from experimental physics II department join Gordon Research Conference

This years Gordon Research Conference on "Fundamental Insights into Plasma Processing" was held at the Bryant University in Smithfield, Rhode Island from the 5th to the 10th of August. The additional Gordon Research Seminar for PhD students, Post-Docs and young scientists started at the 4th of August. The PhD students Sebastian Dzikowski, Katharina Grosse, and Theresa Urbanietz from experimental physics II, RUB, working in the SFB-1316 participated in both the seminar and the conference with poster presentations. Additionally, Theresa Urbanietz was selected to give a students talk at the Gordon Research Seminar. During the Gordon Research Conference, Professor Uwe Czarnetzki from the experimental physics V department gave a talk about challenges in diagnostics with the title "Plasma Diagnostics: What Can We Know? What Ought We Do? For What May We Hope?".

The atmosphere of this conference was very friendly and the discussions between students, post-docs and professors during the poster sessions were both fruitful and motivating. The students had the opportunity during each lunch to sit and eat with different experts (paper editors, scientists in academia and industry...) to discuss their career in a casual environment. The overall programm of the Gordon Research Seminar and the Gordon Research Conference was perfectly put together and the chances for students to discuss their work with advanced researchers in their field created a very unique atmosphere for which the Gordon Research Conferences are famous.

Internationalization

13th Frontiers in Low-Temperature Plasma Diagnostics & 1st Frontiers in Low-Temperature Plasma

The 13th FLTPD workshop on 12th-15th May 2019 is an European event which brings together scientists working on low-temperature plasmas to present their recent results, focusing on original diagnostic techniques. The workshop will take place in the physics center of the German Physical Society in Bad Honnef and is limited to approximately 100 participants from academic, research and industrial institutions.

The program consists of expert presentations from around 10 invited speakers, topical talks selected by the International Scientific Committee from submitted abstracts, and poster contributions. As a rule, all participants will stay at the conference site and are expected to present a contribution.

It is an important and fruitful opportunity for young plasma scientists to share and discuss the latest developments in plasma diagnostics with the experts in the field.

The Conference is organized by Prof. Uwe Czarnetzki from the RUB and other European partners.

Honour

Masao Horiba Prize for Dr. Tsankov

The Masao Horiba Prize has been awarded annually for 15 years to scientists and technical experts to honor world-leading ideas and innovations in diagnostic methods. The specific topic is selected each year from the areas promoted/represented by the HORIBA Group. The topic of this year's award was "Advanced analytical measurement technologies for the semiconductor manufacturing process". Semiconductor technologies form the foundation of today's society. In order to drive forward the constant development, many companies in the industry need new innovations - not only in the production of materials but also in the control and observation of production processes, e. g. by new diagnostic methods.

A jury of established scientists and representatives of the HORIBA Group selected the prize winners. Among them Dr. Tsanko Vaskov Tsankov from the Chair of Plasma and Atomic Physics, Faculty of Physics and Astronomy was especially distinguished. Dr. Tsankov has developed a plasma diagnostic method that allows the non-invasive determination of plasma parameters. The prize will be awarded at a ceremony in October at Kyoto University. Dr. Tsankov has received an award from the HORIBA Group for his work "Non-invasive plasma characterization using the ion velocity distribution function".