Turning science fiction into science fact

Everything revolves around IRIS Adlershof in the current issue of the WISTA-magazine "Potenzial". In the following three articles different areas of IRIS Adlershof are introduced:

Turning science fiction into science fact
Professor Jürgen P. Rabe, director of the Integrative Research Institute for the Sciences IRIS Adlershof, about building bridges, joint labs, and a new research building

A hub for basic research, teaching, and industrial application
How the Integrative Research Institute for the Sciences IRIS Adlershof supports many different technology start-ups

Focusing on advanced materials
A graduate school in Adlershof offers top qualification and turns teams into families

More information can be found here.



Conference on a FAIR Data Infrastructure for Materials Genomics was a Big Success

539 participants from 33 countries and 6 continents: the Conference on a FAIR Data Infrastructure for Materials Genomics was a big success. IRIS Adlershof members were also involved.
With the five plenary speakers:

  • Barend Mons (Leiden University, Co-Leader of the GO-FAIR Initiative, President of CODATA - The FAIR Guiding Principles in Times of Crisis),
  • Claudia Draxl (Humboldt-Universität zu Berlin, IRIS Adlershof, FAIR-DI e.V. -  New Horizons for Materials Research - Role of FAIR Data),
  • York Sure-Vetter (Director of the NFDI Directorate, KIT - The German Research Data Infrastructure: Concepts, Challenges and Chances),
  • James Warren (Director of the Materials Genome Program, NIST - The US Material Genome Initiative and the Materials Data Infrastructure), and
  • Tong-Yi Zhang (Director of the Materials Genome Institute, Shanghai University  - From Data to Knowledge: Data Driven Discovery of Formulas),

as well as 28 renown invited speakers, essentially all worldwide leading experts were present. In addition, numerous young scientists presented their research at a poster session and two satellite workshops on Data Acquisition in Angle-Resolved Photoemission Spectroscopy and NFDI@Teaching. IRIS Adlershof member Christoph Koch was involved in the latter as speaker, he also acted as one of the moderators.

High-resolution videos of all the 33 talks and the discussions as well as the poster pitch videos are available on the conference website, on the NOMAD Laboratory YouTube Channel  and on KouShare.

The conference was organized by FAIR-DI e.V., an association dedicated to building a worldwide data infrastructure for big data from material science, engineering, and astronomy that follows the FAIR principles.


Printed perovskite LEDs – an innovative technique towards a new standard process of electronics manufacturing

Graphical representation of the printing process for the perowskite-LEDs.
© Claudia Rothkirch/HU Berlin

A team of researchers from the Helmholtz-Zentrum Berlin (HZB) and Humboldt-Universität zu Berlin has succeeded for the first time in producing light-emitting diodes (LEDs) from a hybrid perovskite semiconductor material using inkjet printing.This opens the door to broad application of these materials in manufacturing many different kinds of electronic components.The scientists achieved the breakthrough with the help of a trick: "inoculating" (or seeding) the surface with specific crystals.

Microelectronics utilise various functional materials whose properties make them suitable for specific applications. For example, transistors and data storage devices are made of silicon, and most photovoltaic cells used for generating electricity from sunlight are also currently made of this semiconductor material. In contrast, compound semiconductors such as gallium nitride are used to generate light in optoelectronic elements such as light-emitting diodes (LEDs). The manufacturing processes also different for the various classes of materials.

Transcending the materials and methods maze

A look inside the Helmholtz Innovation Lab HySPRINT.
Major work on the printable perovskite-LEDs was carried out here.
 © HZB/Phil Dera

Hybrid perovskite materials promise simplification – by arranging the organic and inorganic components of semiconducting crystal in a specific structure. “They can be used to manufacture all kinds of microelectronic components by modifying their composition“, says Prof. Emil List-Kratochvil, head of a Joint Research Group at HZB and Humboldt-Universität. What's more, processing perovskite crystals is comparatively simple. “They can be produced from a liquid solution, so you can build the desired component one layer at a time directly on the substrate“, the physicist explains.

First solar cells from an inkjet printer, now light-emitting diodes too

Scientists at HZB have already shown in recent years that solar cells can be printed from a solution of semiconductor compounds – and are worldwide leaders in this technology today. Now for the first time, the joint team of HZB and HU Berlin has succeeded in producing functional light-emitting diodes in this manner. The research group used a metal halide perovskite for this purpose. This is a material that promises particularly high efficiency in generating light – but on the other hand is difficult to process. “Until now, it has not been possible to produce these kinds of semiconductor layers with sufficient quality from a liquid solution“, says List-Kratochvil. For example, LEDs could be printed just from organic semiconductors, but these provide only modest luminosity. “The challenge was how to cause the salt-like precursor that we printed onto the substrate to crystallise quickly and evenly by using some sort of an attractant or catalyst“, explains the scientist. The team chose a seed crystal for this purpose: a salt crystal that attaches itself to the substrate and triggers formation of a gridwork for the subsequent perovskite layers.

Significantly better optical and electronic characteristics

In this way, the researchers created printed LEDs that possess far higher luminosity and considerably better electrical properties than could be previously achieved using additive manufacturing processes. But for List-Kratochvil, this success is only an intermediate step on the road to future micro- and optoelectronics that he believes will be based exclusively on hybrid perovskite semiconductors. “The advantages offered by a single universally applicable class of materials and a single cost-effective and simple process for manufacturing any kind of component are striking“, says the scientist. He is therefore planning to eventually manufacture all important electronic components this way in the laboratories of HZB and HU Berlin. List-Kratochvil is Professor of Hybrid Devices at the Humboldt-Universität zu Berlin and head of a Joint Lab founded in 2018 that is operated by HU together with HZB. In addition, a team jointly headed by List-Kratochvil and HZB scientist Dr. Eva Unger is working in the Helmholtz Innovation Lab HySPRINT on the development of coating and printing processes – also known in technical jargon as "additive manufacturing" – for hybrid perovskites. These are crystals possessing a perovskite structure that contain both inorganic and organic components.

The work was published in Materials Horizons, the journal of the Royal Society of Chemistry, in an article entitled:
„Finally, inkjet-printed metal halide perovskite LEDs – utilizing seed crystal templating of salty PEDOT:PSS“
Felix Hermerschmidt, Florian Mathies, Vincent R. F. Schröder, Carolin Rehermann, Nicolas Zorn Morales, Eva L. Unger, Emil. J. W. List-Kratochvil. DOI: 10.1039/d0mh00512f

Ralf Butscher


Development of high-resolution printing technologies - Start of the HI-ACCURACY project

The European project HI-ACCURACY coordinated by MATERIALS started on April 1st, 2020. HI-ACCURACY is funded by HORIZON 2020 research framework programme with a total volume of around 5 million euros a project term of 36 months.

According to current estimates, the global market for printed, flexible and organic electronics amounts to 28.3 billion euros with an annual growth rate of >8%. This market is mainly dominated by the display industry, which is looking for new and innovative ways to increase screen resolution and incorporate new user interfaces throughout the display range. High-resolution printing technology is an important factor in achieving these goals.

HI-ACCURACY aims to produce structures with very high resolution up to the μm range and thus the next generation of large area production of flexible organic electronics. This goal is to be achieved through a unique range of advanced materials and printing inks combined with scalable, cost-effective printing and coating processes that require no or minimal vacuum. HI-ACCURACY will thus demonstrate the production of front and backplane structures with structure sizes approaching 1 μm that can operate at frequencies of >1MHz.

Further information can be found here.


Max Heyl receives the Fischer-Nernst Study Award of HU's Department of Chemistry

This year's Fischer-Nernst Study Award of the Department of Chemistry of Humboldt-Universität zu Berlin has been awarded to Max Heyl for his Master's thesis work on the exfoliation and polymer-free transfer of TMDC monolayers using template-stripped gold substrates. Max Heyl has conducted this work as part of the Collaborative Research Center CRC 951 - "Hybrid Inorganic/Organic Systems for Opto-Electronics (HIOS)", where he now also continues to working as a doctoral student in the Hybrid Device group of the Prof. Emil List-Kratochvil, who is a Deputy Director of IRIS Adlershof.

Well deserved Max!


New Collaborative Research Centre „FONDA – Foundations of workflows for large- scale scientific data analysis“ at Humboldt-Universität zu Berlin

The German Research Foundation (DFG) has approved a new Collaborative Research Centre (CRC) at Humboldt-Universität zu Berlin. The CRC 1404 entiteld „FONDA – Foundations of workflows for large- scale scientific data analysis“ will initially be funded for four years from July 1, 2020. Spokesperson of the CRC is Prof. Ulf Leser from the Department of Computer Science of Humboldt-Universität zu Berlin. The new research network focuses on the research of techniques, processes and tools that enable scientists to be more productive when creating and using data analysis workflows. Special emphasis is laid on portability, adaptability and reliability that are important for this goal. On the part of  IRIS Adlershof, the professors Claudia Draxl, Christoph T. Koch and Alexander Reinefeld are involved in the new CRC.

We congratulate the successful applicants and wish the new project a good start.



Fengshuo Zu receives 2019 Chinese Government Award

Congratulations! Fengshuo Zu, former doctoral student in the group of Norbert Koch, who is a member of IRIS Adlershof, received the  “2019 Chinese Government Award for Outstanding Self-Financed Students Abroad” of the China Scholarship Council. Meanwhile Fengshuo is postdoc in the Koch group and investigates the electronic structure of metal halide perovskites for high-efficiency solar cells.

Well deserved, Fengshuo!


Graduate School "Advanced Materials": First admission of members

This April, the Graduate School "Advanced Materials" (GS-AM) admitted 22 doctoral students as members, from HU Berlin, FU Berlin, TU Berlin, and Potsdam Universität. The mission of GS-AM is to provide superior qualification for doctoral students across Berlin and Potsdam, in research on modern and emerging advanced materials for optics, electronics, and optoelectronics, as well as in transferable skills.

The spokesman of the graduate school, Professor Norbert Koch from the Department of Physics and IRIS Adlershof at HU explains: The research projects of our students are devoted to unraveling fundamental and applied aspects of 3D and 2D inorganic semiconductors, organic semiconductors, and their hybrids. During the current period of reduced access to the universities, GS-AM offers online-courses by professional trainers, on topics such as scientific writing/presentation, project management, and scientific leadership. We all hope that meeting in person will become possible eventually, but for the time being digital instruments are our key for interaction.

The next term of applications to GS-AM will be in the fall of 2020.

more information