8th „Nano and Photonics“ meeting in the Castle of Mauterndorf, Austria

From 20.3.-22.3.2019 Wolfgang Knoll (Austrian Institute of Technology), Franz Aussenegg (Universität Graz and Erwin-Schrödinger Institute) and Emil J.W. List-Kratochvil (Humboldt-Universität zu Berlin and Member of IRIS Adlershof) jointly organize the 8th “Nano and Photonics” meeting in the Castle of Mauterndorf, Austria.

This year’s program was put together with a topical focus on “Sensing applications based on plasmonic nanostructures and on Photovoltaic Technologies“. Invited speakers include S. Kawata from Osaka University, B. Hecht from Universität Würzburg, und T. Dimopoulos from the Austrian Institute of Technology, and many others.

The purpose of this event is to organize an international scientific meeting for those, who are interested in photonic applications of modern nanotechnology. One goal of this event is also to create an informal European wide discussion platform for state of the art work in basic research done at the various universities as well as industrial based research and development. The location, Castle Mauterndorf, provides an ideal environment to discuss the entire range of topics without any pressure of time, in particular between the morning and afternoon sessions as well as in the evening. This year again it is expected to gather 80 participants from 7 different countries.



Cluster of Excellence Matters of Activity ventures on a new culture of the material

Matters of ActivityIn the Cluster of Excellence "Matters of Activity. Image Space Material", researchers from more than 40 disciplines collaborate in six subprojects to lay the foundations for a new way of thinking of the material. Key to this endeavour is the vision of re-thinking the object world not like commonly done as passive and rigid, but as based on active, changeable and recyclable building materials. Adaptive fiber architectures and complex structured biofilms are among the sources of inspiration for novel designs in the future. The cluster of Humboldt-Universität zu Berlin is conceptually close to the Bauhaus as well as to the academic movement of New Materialism. The members of IRIS Adlershof Prof. Jürgen P. Rabe and Prof. Matthias Staudacher are involved as principal investigators in the cluster.



Enlightening full-color displays

Researchers from the University of Strasbourg & CNRS (France), in collaboration with University College London (United Kingdom), and Humboldt University Berlin (Germany), have shown that a subtle combination of light-emitting semiconducting polymers and small photoswitchable molecules can be used to fabricate light-emitting organic transistors operating under optical remote control, paving the way to the next generation of multifunctional optoelectronic devices. These achievements have now been published in Nature Nanotechnology.

Organic light-emitting transistors are widely recognized as key components in numerous optoelectronic applications. However, the integration of multiple functionalities into a single electronic device remains a grand challenge in this technological sector. Moreover, the next generation of displays requires to encode high-density visual information into single and ultra-small pixels.

Now a team of researchers from Strasbourg, London, and Berlin has taken a big step forward by creating the first organic light-emitting transistor that can be remote-controlled by light itself. They have been blending a custom-designed molecule as a miniaturized optical switch with a light-emitting semiconducting polymer. Upon illumination with ultraviolet and visible light, the molecular switch reversibly changes its electronic properties. As a consequence, the electrical and optical response of the device can be modulated simultaneously by light, which serves as an optical remote control.

However, having a device capable of producing only one color is not sufficient for daily-life applications, such as full-color displays. By choosing appropriate photoswitchable molecules and blending them with suitable light-emitting polymers, the researchers have demonstrated that this new type of organic light-emitting transistors can shine in the range of the three primary colors (red, green, and blue), thereby covering the entire visible spectrum.

The disruptive potential of such approach was demonstrated by writing and erasing spatially defined emitting patterns (a letter for example) within a single device with a beam of laser light, allowing a non-invasive and mask-free process, with a response time on the microsecond scale and a spatial resolution of a few micrometers, thus outperforming the best “retina” displays. Clearly, these findings represent a major breakthrough that offers multiple perspectives for smart displays, active optical memories, and light-controlled logic circuits.



Outstanding Berlin Science: Seven excellence clusters for the Berlin University Alliance

Seven Cluster of Excellence in the Excellence Strategy of the Federal Government and the Länder approved for the Berlin University Alliance. Members of IRIS Adlershof participate in the following clusters as PIs:

Matters of Activity: Image Space Material - A new culture of material
(Prof. Jürgen P. Rabe, Prof. Matthias Staudacher)

MATH+  - How Berlin mathematics is shaping the future (Prof. Michael Hintermüller)

Unifying Systems in Catalysis (UniSysCat) - How to Understand and Utilize Networks in Catalysis
(Prof. Stefan Hecht, Prof. Christian Limberg)

We congratulate the participating researchers and look forward to a good cooperation!