Fighting hospital germs with UVC light-emitting diodes

A novel LED irradiation system developed by the Ferdinand-Braun-Institut aims to kill microorganisms with ultra-short wave UV light – without side effects. Prototype handed over to the Charité for initial testing.

Berlin, May 25, 2020

According to the Robert Koch Institute, 400,000 to 600,000 infections with hospital germs occur in Germany every year – about 10,000 to 20,000 people die from them. Since
multidrug resistant (MDR) pathogens often cannot be treated with antibiotics, alternative approaches are needed. One promising physical principle is irradiation with UVC light, which can be used to destroy microorganisms without allowing resistances to develop. Within the framework of their Joint Lab GaN Optoelectronics, the Ferdinand-Braun-Institut (FBH) and Technische Universität Berlin (TUB) have developed LEDs emitting in the far ultraviolet (UV) spectral range. The LEDs emit at wavelengths around 230 nm and provide more than one milliwatt output power. Such UVC LEDs are not yet commercially available worldwide due to technological challenges of the utilized material system aluminum-gallium nitride (AlGaN). Their light does not penetrate into the living layers of the skin because of their high degree of absorption. It is therefore expected that the skin – in contrast to long-wave UVC radiation as emitted by mercury vapor lamps, for example – will not be harmed at all or will be damaged so little that the natural repair mechanisms compensate for the effect. The researchers hope that this will help to kill MDR pathogens without any long-term side effects. Within the framework of the VIMRE project (prevention of infection with multidrug resistant pathogens via in-vivo UVC irradiation), FBH has developed and produced an irradiation system comprising an array of 118 of these LEDs on an area of 8 cm x 8 cm. It achieves a maximum irradiation power of 0.2 mW/cm2 with more than 90 % uniformity over an area of 6 cm x 6 cm. The first prototype was delivered to the Department of Dermatology at Charité – Universitätsmedizin Berlin for skin examinations. Another device will soon be delivered to the Institute for Hygiene and Environmental Medicine of the University Medicine Center Greifswald to clarify the microbicidal effectiveness. VIMRE is funded by the German Federal Ministry of Education and Research (BMBF) as part of the consortium "Advanced UV for Life" within the Twenty20 program.

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Contact

Petra Immerz, M.A.
Communications Manager
Ferdinand-Braun-Institut
Leibniz-Institut fuer Hoechstfrequenztechnik
Gustav-Kirchhoff-Str. 4
12489 Berlin, Germany

Phone: +49.30.6392-2626
Fax: +49.30.6392-2602
Email: petra.immerz@noSpamfbh-berlin.de
Web: www.fbh-berlin.de
Twitter: twitter.com/FBH_News

 

 

Related Company / Organization

Ferdinand-Braun-Institut gGmbH, Leibniz-Institut fuer Hoechstfrequenztechnik (FBH), Berlin

The Ferdinand-Braun-Institut, Leibniz-Institut fuer Hoechstfrequenztechnik (FBH) researches electronic and optical components, modules and systems based on compound semiconductors. These devices are key enablers that address the needs of today’s society in fields like communications, energy, health and mobility. Specifically, FBH develops light sources from the visible to the ultra-violet spectral range: high-power diode lasers with excellent beam quality, UV light sources and hybrid laser systems. Applications range from medical technology, high-precision metrology and sensors to optical communications in space. In the field of microwaves, FBH develops high-efficiency multi-functional power amplifiers and millimeter wave frontends targeting energy-efficient mobile communications as well as car safety systems. In addition, compact atmospheric microwave plasma sources are devellopped for medical applications or surface coating.

The FBH is a competence center for III-V compound semiconductors and has a strong international reputation. FBH competence covers the full range of capabilities, from design to fabrication to device characterization.

In close cooperation with industry, its research results lead to cutting-edge products. The institute also successfully turns innovative product ideas into spin-off companies. Thus, working in strategic partnerships with industry, FBH assures Germany’s technological excellence in microwave and optoelectronic research.

The Ferdinand-Braun-Institut develops high-value products and services for its partners in the research community and industry which are tailored precisely to fit individual needs. The institute offers its international customer base complete solutions and know-how as a one-stop agency – from design to ready-to-ship modules.

Research topics & competencies:

  • Diode lasers
  • Gallium nitride optoelectronics
  • Microwave components & systems
  • Gallium nitride electronics
  • Materials and process technology

Ferdinand-Braun-Institut gGmbH, Leibniz-Institut fuer Hoechstfrequenztechnik (FBH)

Gustav-Kirchhoff-Str. 4
12489 Berlin

T: +49 (0)30 / 6932-2602
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