According to estimates, multi-resistant hospital germs kill between 10,000 and 20,000 people in Germany each year. Standard medicines and antibiotics are often already ineffective. As part of the Joint Lab GaN Optoelectronics, researchers at the Ferdinand-Braun-Institut, Leibniz Institut für Höchstfrequenztechnik (FBH) and Technische Universität Berlin (TU Berlin) have developed special LEDs, which emit UVC light at wavelengths of around 230 nanometers (nm). “The goal is to use these LEDs to combat multi-resistant germs,” says Professor Dr. Michael Kneissl, head of the Workgroup Experimental Nanophysics and Photonics at TU Berlin.
OSA Opto Light has just finished developing the easy-to-use LED system OLM-059 for disinfection of surfaces. This system operates at 265 nm, which is the optimal wavelength for DNA and RNA inactivation, has a light emitting area of 80 x 15 mm and achieves an optical power density of 20 mW/cm² at a distance of 1 cm from the glass window.
Due to the rapid technical progress of LEDs in the UVC range between 240 and 280 nm, the interest in UV LEDs as an alternative to conventional mercury-containing systems for water treatment has increased in recent years. The Federal Ministry of Education and Research (BMBF) supported the basic project "GEntLED-UV" on the topic "UV-LED". Within this joint project, TZW could determin how efficient different wavelengths act on undesired microorganisms in the water. Technical aspects such as service life and monitoring of the LED module in comparison to the established low and medium pressure mercury vapour lamps were also taken into account.
For disinfection purposes, the compact system can be equipped with UV LEDs to eliminate germs on critical surfaces such as mobile phones. It can also be assembled with LEDs providing the optimum emission spectrum for polymer curing and medical treatments – even multiple wavelengths are possible.
The ‘International Conference on UV LED Technologies & Applications – ICULTA’ has been rescheduled to next year and will be held from April 18 to 21, 2021 in Berlin, Germany. Once more, it offers a forum for exchange, networking and discussions on the latest progress and innovations in the development of UV LEDs and their broad spectrum of applications. Additionally we look forward to the opportunity to discuss the impacts of COVID19 on UV LED technology solutions. The conference is jointly organized by the German consortium Advanced UV for Life and the International Ultraviolet Association (IUVA).
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.
For several years, the CiS Forschungsinstitut has been working intensively with many partners in the consortium "Advanced UV for Life" (BMBF-funded programme "Zwanzig20 - Partnerschaft für Innovation") in all aspects of production, assembly, metrological characterisation and application-oriented use of UV LEDs.
In particular, the optoelectric measurement technology and the associated evaluation have been significantly further developed in this context.
Aluminum nitride (AlN) bases ultraviolett (UV) technologies promise a wide range of potential market applications e.g. in the area of disinfection, agriculture, and process technologies. Integrated and highly compact UV light-emitting diode (LED) devices could, for example, be used to clean drinking water in remote areas and be applied to disinfect surfaces in hospitals and public areas.
The low-defect AlN epitaxial layers on precisely oriented AlN substrates optimized at IKZ provide an ideal basis for research work on aluminum-rich AlxGa1-xN layers or UVC LEDs with ultra-short wavelengths.
OSA Opto Light has completed a first easy-to-use LED lamp with integrated battery for disinfection of surfaces. This rod-shaped lamp used with UVC LEDs has an optical power of approx. 15 mW/cm² @ 265 nm, which can eliminate viruses with a simple hand scan. This LED module contains six UV LEDs with a lens that focuses the light in an angle of about 20°C. The Module can be operated for about 30 min before needing to recharge.
Researchers at the Fraunhofer Institute for Optronics, Systems Engineering and Image Exploitation IOSB, Applied Systems Technology-AST, have developed an innovative solution for disinfecting smartphones. Within a few seconds, smartphones can be cleaned of bacteria and viruses such as SARS-CoV-2. Instead of expensive chemicals, UVC light is used. Further fields of application are imaginable.
The Senate of Berlin has decreed that all conferences with more than 50 participants must be canceled. Therfore, the ‘International Conference on UV LED Technologies & Applications - ICULTA 2020' cannot take place in April 2020 as planned but needs to be postponed.
The organizers - Advanced UV for Life consortium and IUVA - are in the process of figuring out a new date.
UVphotonics will present novel UV LED developments with emission wavelengths from 330 nm to as low as 230 nm at Photonics West 2020. The versatile light sources are configurable to various application requirements.
FBH exhibits novel diode lasers and modules at Photonics West 2020. Applications include materials processing, LiDAR, medicine, and (Raman) spectroscopy. Progress in UV LEDs is presented jointly with the spin-off UVphotonics.