Activity Report 2025

Prof. Dr. Elizabeth von Hauff
Director of Fraunhofer FEP

The year 2025 presented Fraunhofer FEP with a wide range of challenges, shaped by a dynamic geopolitical and economic environment. Yet it is precisely in times like these that difficult conditions often provide the most fertile ground for new ideas and innovations. Over the past twelve months, we have further refined our strategic focus and made targeted investments in our infrastructure and in expanding the institute’s expertise – with the clear goal of setting the course for successful and future-oriented development and continuing to meet the needs of our partners and customers.

In 2025, we aligned the topics from the strategy process audited in 2023 with the direction of new research policy agendas, such as the High-Tech Agenda for Germany and the 10th EU Framework Program for Research and Innovation. As a result, we have grouped our core competencies into overarching pillars:

  • Decarbonization, climate-neutral energy, and mobility
  • Biotechnology, biomedicine, and the circular economy
  • Microelectronics
  • Security and resilience, aerospace

In this issue, we present the scientific highlights from these new research areas. We demonstrate how microstructured polymer films can be used to fully integrate photovoltaic modules into building façades.

The versatility of low-energy electron beam technology is demonstrated in the articles on the antiviral functionalization of environmentally sustainable nonwoven fabrics for respiratory masks, our new hybrid technology in the form of bioreactors with built-in low-energy electron beam sources, and innovative approaches to the synchronized pulsing of electron beams and atmospheric-pressure plasma. The range of topics is rounded out by our newly developed mushroom-shaped source for seed treatment.

In the field of microelectronics, we showcase the digitization of complex coating processes to increase efficiency in transferring laboratory results to the market. In the article on sputter epitaxy, we highlight the sustainable, large-scale production of epitaxial sputtered nitride layers for power electronics.

Finally, we present innovative coating solutions for corrosion protection, conductivity, and shielding for the aerospace and defense industries.

For us, 2025 was also marked by international networking and new forms of cooperation. Internationally, we were represented at events including InterBattery in Seoul and, once again, at Manufacturing World in Tokyo. My participation in a K-FAST delegation trip to South Korea and the expansion of our memorandum of understanding with the Korean Technology Promotion Agency (TIPA) underscore our commitment to sustainable, international collaborations.

We also made our mark on the national level: My presentation at the Saxon Innovation Conference, our participation in the Saxon Transfer Award, and our contribution to the Day of German Aerospace Regions demonstrate the breadth of our expertise – from sustainable coatings to solutions for the mobility of the future.

A highlight of the year was the continuation of our own “pro flex” conference in May, through which we successfully created a platform for exchange between science and industry for the eighth time.

With the new “Innovation Week” format, we gave companies and research institutions the opportunity to work with us to further develop forward-looking ideas directly within an industrial research environment. The positive response and the resulting collaborations confirm the value of this approach.

A special highlight was the 25th anniversary of our MAXI inline vacuum coating system, which we celebrated as part of the V2025 tutorial. Here, we impressively demonstrated how sustainability can be implemented in surface technology.

I would like to thank all our employees, partners, and supporters for their tremendous dedication. We now look forward with confidence to the developments ahead and are excited to shape the future together with you.

Prof. Dr. Elizabeth von Hauff
Director of Fraunhofer FEP

Research News

 

DesignPV

Aesthetic and efficient building-integrated photovoltaics

 

Sustainable protective textiles

achieved by electron beam-assisted functionalization with humic substances

 

Innovative electron beam technology

for biotechnological processes

 

ELBION: Development of a compact electron source

cost-efficient phytosanitary seed treatment

 

Digitalization of coating processes

 

Magnetron Sputter Epitaxy

A Technology for the Future of GaN Power Electronics

 

Coatings for the aviation industry

Lighter, less pollutant and yet safe

 

MAXI as a research platform

Sustainable surface technology for the future

Financing

Fraunhofer FEP was able to bring in 7.0 million € of new business from industry through direct contracts. Proceeds of 3.7 million € were obtained from public projects funded by the federal and state governments. The expenditure of institutional capital ran to 11.3 million €.

Employee development

Last year, an average of 151 employees (including 4 trainees) and 26 research assistants/interns worked at the Institute. Of the 54 staff members that were employed as scientists, 11 were additionally working on their doctoral degrees. The proportion of females in the scientific area amounted to 25.3 percent.

Investment costs

Total expenditures from the operating and investment budget amounted to 22.0 million €. 1.5 million € was invested in equipment, construction and infrastructure during the period.

Staff and material costs

Personnel expenditures totaled 12.3 million €, representing 60.0 percent of the operating budget (20.5 million €). Material costs amounted to 8.2 million €.

Jahr
Year
Titel/Autor:in
Title/Author
Publikationstyp
Publication Type
2025 51.3 GHz Overmoded Bulk Acoustic Resonator Using 35% Scandium Doped Aluminum Nitride
Baek, Juhan; Barth, Stephan; Schreiber, Tom; Bartzsch, Hagen; Duncan, John; Piazza, Gianluca
Zeitschriftenaufsatz
Journal Article
2025 Magnetron-sputtered thin films enabling heat transfer enhancement in electrocaloric heat pumps
Barrera Marin, Maria Isabel; Vogel, Cordula; Fietzke, Fred
Zeitschriftenaufsatz
Journal Article
2025 Surface wettability modification of polymers for use in electrocaloric heat pumps
Barrera Marin, Maria Isabel; Pinkal, Daniel; Wegener, Michael; Vogel, Cordula; Fietzke, Fred
Zeitschriftenaufsatz
Journal Article
2025 Beschichtungsprozesse für Ultraschallsensoren digitalisieren
Barth, Stephan
Zeitschriftenaufsatz
Journal Article
2025 Verfahren zur Herstellung eines elektrochromen Laminats und elektrochromes Laminat
Fahland, Matthias; Steiner, Cindy; Vogt, Tobias; Meyer, Uwe
Patent
2025 Verfahren zum Abscheiden einer thermochromen Vanadiumdioxidschicht auf einem Glassubstrat
Fahland, Matthias; Szelwicka, Jolanta; Dreßler, Daniel; Werner, Torsten
Patent
2025 Keramisches Bauteil mit einem superhydrophilen Oberflächenbereich, Verfahren zum Herstellen sowie Verwendung eines solchen keramischen Bauteils
Fietzke, Fred; Barrera Marin, Maria Isabel; Klostermann, Heidrun
Patent
2025 Effiziente und dekorative PV mit Rolle-zu-Rolle-Nano-Imprint-Lithografie
Günther, Steffen
Zeitschriftenaufsatz
Journal Article
2025 Die Oberflächen biobasierter Materialien selektiv modulieren
Gürtler, Nic; König, Ulla
Zeitschriftenaufsatz
Journal Article
2025 Advanced Biobased Nanocellulose Composites Engineered by Low-Energy Electron Beam Processing
Gürtler, Nic; König, Ulla
Zeitschriftenaufsatz
Journal Article
2025 Sustainable energy experiments and demonstrations: Reviewing research, market and societal trends
Hasanefendic, Sandra; Hoogstraaten, Marjolein; Bloemendal, Martin; Boon, Wouter; Brezet, Han; Coenen, Lars; Dai, Yuxi; Chappin, Maryse M.H.; Frishammar, Johan; Grijp, Nicolien van der; Femenías, Paula; Hal, Anke van; Elzinga, Remi; Heller, Renée; Ma, Zhongxuan; Moore, Trivess; Nemet, Gregory; Sjøtun, Svein Gunnar; Hellsmark, Hans; Kaipainen, Jenni; Hoppe, Thomas; Söderholm, Patrik; Hauff, Elizabeth von; Wang, Rong; Bossink, Bart; Reiner, David; Isabella, Olindo; May, Christian; Keviczky, Tamás; Khosravi, Mohammad; Janssen, Matthijs; Leer, Janneke van der; Konstantinou, Thaleia; Mousavi, Seyedesmaeil; Mlecnik, Erwin; Nigra, Marianna; Santbergen, Rudi; Vardon, Philip J.; de Vries, Gerdien; Ryghaug, Marianne; Kwant, Stefan; Loos, Adriaan van der; Meelen, Toon; Skjølsvold, Tomas Moe; Negro, Simona O.; Rijnsoever, Frank van; Alberg Mosgaard, Mette; Ridjan Skov, Iva; Smink, Carla K.; Tiekstra, Sybrith
Zeitschriftenaufsatz
Journal Article
2025 Continuing the diversity conversation
Hauff, Elizabeth von
2025 Verbundvorhaben PolyFoleR - Elektrisch leitfähig eingestellte Polymercompound-Folien für elektrochemische Reaktoren
Huwald, Laura; Joemann, Michael; Sichelschmidt, Christian; Wand, Maximilian; junge Puring, Kai; Rögner, Frank-Holm; Gotzmann, Gaby; Saager, Stefan
Bericht
Report
2025 How to sterilize biodegradable polymers? An in-depth characterization of effects of low energy electron beam irradiation (LEEI) and gamma irradiation on the molecular weight of poly(lactide-co-glycolide) films
Krieghoff, Jan; Gotzmann, Gaby; Teichmann, Tobias; Schulz-Siegmund, Michaela
Zeitschriftenaufsatz
Journal Article
2025 The influence of sputter-deposited indium tin oxide thin films on the strength of ultra-thin glass
Langgemach, Wiebke; Fahland, Matthias; Rädlein, Edda
Zeitschriftenaufsatz
Journal Article
2025 Verfahren zum Verbinden zweier Folienabschnitte mit einer lokalen Öffnungsmöglichkeit
Neubauer, Jochen; Stramm, Cornelia; Günther, Steffen; Kutschke, Elisa; Bork, Andreas; Mörbitz, Philip; Marbach, Lena
Patent
2025 Growth of non-polar and semi-polar GaN on sapphire substrates by magnetron sputter epitaxy
Pingen, Katrin; Wolff, Niklas; Hinz, Alexander Martin; Sandström, Per; Beuer, Susanne; Kienle, Lorenz; Hultman, Lars; Hsiao, Ching-Lien; Darakchieva, Vanya; Birch, Jens
Zeitschriftenaufsatz
Journal Article
2025 Optimization of the room-temperature electrocaloric properties of poly(vinylidene fluoride-trifluoroethylene) copolymers (55/45 mol. %) by means of electron irradiation
Pinkal, Daniel; Barrera Marin, Maria Isabel; Fietzke, Fred; Wegener, Michael
Zeitschriftenaufsatz
Journal Article
2025 Continuous Coating of Bipolar Plates via Plasma-Activated EB-PVD Technology
Saager, Stefan; Decker, Ludwig; Modes, Thomas; Neidhardt, Jörg; Klose, Lars; Rögner, Frank-Holm; Scheffel, Bert; Zimmermann, Burkhard; Zywitzki, Olaf
Zeitschriftenaufsatz
Journal Article
2025 Plasma-Activated EB-PVD for High-Throughput Continuous Coating
Saager, Stefan; Decker, Ludwig; Modes, Thomas; Neidhardt, Jörg; Klose, Lars; Rögner, Frank-Holm; Zimmermann, Burkhard; Scheffel, Bert; Zywitzki, Olaf
Zeitschriftenaufsatz
Journal Article
2025 Highly transparent aluminum silicon oxy nitride permeation barriers for optoelectronic devices
Schlenz, Patrick; Steiner, Cindy; Zywitzki, Olaf; Hauff, Elizabeth von
Zeitschriftenaufsatz
Journal Article
2025 Smart Headlights with Coaxial Integration of LiDAR and Radar Sensing
Stefanidi, Dmitrii; Schreiber, Peter; Vogel, Sönke; Täschner, Kerstin; Albert, Konstantin; Schepers, Maurice; Gillner, Arnold
Konferenzbeitrag
Conference Paper
2025 Nachhaltiger Reinigen mit plasmabehandelten Flüssigkeiten
Steinhäußer, Linda; Gotzmann, Gaby
Zeitschriftenaufsatz
Journal Article
2025 Production, shelf life and surface sanitizing efficacy of plasma-treated liquids
Steinhäußer, Linda; Hain, Kevin; Lachmann, Kristina; Weile, Daniel; Gotzmann, Gaby
Zeitschriftenaufsatz
Journal Article
2025 Plasma-treated liquids as an environmentally friendly alternative to conventional disinfectants for the sanitization of food processing facilities - shelf life characteristics and antibacterial efficacy
Steinhäußer, Linda; Gotzmann, Gaby
Konferenzbeitrag
Conference Paper
2025 Compact Beam Sources for Low-Energy Electron Treatment of Seeds
Teichmann, Tobias; Mattausch, Gösta; Zimmermann, Burkhard
Konferenzbeitrag
Conference Paper
2025 Purple Bacteria Reaction Center Based Solid State Bio-Solar Cell With a Large Open Circuit Voltage
Tulus, Tulus; Friebe, Vincent Morris; Peukert, Andreas; Muscarella, Loreta A.; Jones, Michael R.; Frese, Raoul N.; Hauff, Elizabeth von
Zeitschriftenaufsatz
Journal Article
2025 Unveiling the Role of Guanidinium for Enhanced Charge Extraction in Inverted Perovskite Solar Cells
Xu, Weidong; Min, Ganghong; Kosasih, Felix Utama; Dong, Yueyao; Ge, Ziyuan; Gu, Qichun; Chen, Muzi; Pacalaj, Richard A.; Wang, Tong; Webb, Thomas; Du, Tian; Righetto, Marcello; He, Guanjie; Hillenius, Mischa; Hauff, Elizabeth von; McLachlan, Martyn A.; Haque, Saif A.; Bakulin, Artem A.; Durrant, James R.; Cacialli, Franco; Divitini, Giorgio; Ducati, Caterina; Lin, Chieh-Ting; Macdonald, Thomas J.; Stranks, Samuel D.
Zeitschriftenaufsatz
Journal Article
2025 Fraunhofer-Institut für Elektronenstrahl- und Plasmatechnik. Jahresbericht 2024/2025
Jahresbericht
Annual Report
2025 pro flex 2025. Proceedings
Tagungsband
Conference Proceeding
Diese Liste ist ein Auszug aus der Publikationsplattform Fraunhofer-Publica

This list has been generated from the publication platform Fraunhofer-Publica

Patent number

Title

Inventor(s)

Registration

Grant

DE 10 2023 207 810 B3

Verfahren und Vorrichtung zur Ermittlung einer Strahlungsdosis, die eine wässrige Flüssigkeit durch Elektronenstrahlung erfährt

S. Schopf
U. König
J. Besecke
J. Kubusch

14.08.2023

13.02.2025

BR 112021006089-8

Método para estimular o crescimento de uma biomassa que é misturada com um líquido dentro de um biorreator

J. Schönfelder
C. Wetzel
G. Gotzmann
V. Kirchhoff
A. Weidauer
J. Kubusch

29.03.2021

08.04.2025

US 12 362 141 B2

Apparatus and method for depositing hard carbon layers

B. Scheffel
M. Tenbusch
S. Saager

17.03.2023

15.07.2025

US 12 274 971 B2

Apparatus and method for applying accelerated electrons to gaseous media

G. Mattausch
R. Blüthner
A. Weidauer
B. Zimmermann
J. Kubusch
R. Labitzke
F.-H. Rögner
V. Kirchhoff

03.08.2022

15.04.2025

US 12 350 387 B2

Method for inactivating biologically active components in a liquid

J. Schönfelder
V. Kirchhoff
G. Gotzmann
C. Wetzel
A. Weidauer
J. Kubusch

02.04.2021

08.07.2025

EP 4 331 002 B1

Hohlkathodensystem zum Erzeugen eines Plasmas und Verfahren zum Betreiben eines solchen Hohlkathodensystems

G. Mattausch
B. Zimmermann
H. Flaske
B. Meyer
R. Labitzke
S. Weiss
J. Kubusch
V. Kirchhoff

30.08.2023

30.04.2025

US 12 291 705 B2

Method for stimulating the growth of a biomass, contained in a liquid, inside a bioreactor

J. Schönfelder
G. Gotzmann
C. Wetzel
V. Kirchhoff
A. Weidauer
J. Kubusch

02.04.2021

06.05.2025

JP 7687564 B2

Selbstdesinfizierendes antivirales Filtermaterial, dessen Herstellung und Anwendung, sowie Luftfiltereinrichtung mit dem Filtermaterial

M. Hoffmann
H. Böttcher

09.02.2023

26.05.2025

US 12 385 134 B2

Barrier layer system and method for producing a barrier layer system

E. Törker
F. Selbmann
C. Keibler-Willner
M. Baum
M. Wiemer

23.09.2022

12.08.2025

KR 10-2814648 B1

Method for stimulating the growth of a biomass, contained in a liquid, inside a bioreactor

J. Schönfelder
G. Gotzmann
C. Wetzel
V. Kirchhoff
A. Weidauer
J. Kubusch

04.05.2021

26.05.2025

IN 571141

Method for inactivating biologically active components in a liquid

J. Schönfelder
V. Kirchhoff
G. Gotzmann
C. Wetzel
A. Weidauer
J. Kubusch

27.03.2021

25.09.2025

JP 7775334 B2

Hohlkathodensystem zum Erzeugen eines Plasmas und Verfahren zum Betreiben eines solchen Hohlkathodensystems

G. Mattausch
B. Zimmermann
H. Flaske
B. Meyer
R. Labitzke
S. Weiss
J. Kubusch
V. Kirchhoff

27.10.2023

14.11.2025

JP 7794809 B2

Apparatus and method for depositing hard carbon layers

B. Scheffel
M. Tenbusch
S. Saager

16.09.2021

04.12.2025