Parallel to the SPIE Photonics West Exhibition, a number of technical conferences will also take place. As part of the OPTO Conference 12022 “Light-Emitting Devices, Materials, and Applications XXVI”, Prof. Thomas Ortlepp will present current research results from the CiS Research Institute on “UVC-LEDs: increase in optical performance through an optimized potting material” in Session 2: UV Emitters on Tuesday.
The starting point for this research is the newly assumed role of surface disinfection in the context of the corona pandemic. UVC modules based on LED chips are expected to replace mercury vapor lamps for surface disinfection. However, this will only succeed if the optical performance required for disinfection can be guaranteed.
In the presentation, the development of just such potting materials for UVC LED chips will be presented. The aim of the research work was to find a potting material for use at a wavelength of 250 nm that is sufficiently transparent, easy to process and stable in its properties at these wavelengths for many 100 hours. Furthermore, the total reflection in the LED base body should be minimized by a refractive index of the cured material n >> 1.4. In addition to the material development aspects, the metrological requirements and long-term studies are also presented.
In the project, the research institute has succeeded in developing a potting technique that can increase the performance of UVC LEDs by up to 70%.
In the next stages of development, we will expand and mutually complement the aging studies. Another approach – the incorporation of nanoparticles into the potting compound – promises additional gains in terms of UV stability and further improved refractive index.
The presentation focuses on the development results and the cooperation of the CiS Research Institute with JenCAPS Technology GmbH. Nevertheless, the successful cooperation within the consortium with the partners Technische Universität Berlin (AG Prof. Kneissl), Ferdinand-Braun-Institut gGmbH, UVphotonics GmbH, SCHOTT AG and sglux SolGel Technologies GmbH should also be mentioned at this point.
The work described was supported in part by the German Federal Ministry of Education and Research (BMBF) through the consortium project “Advanced UV for Life” under contract 03ZZ0144A (“OLAV”).
25 January 2022 | 10:10 AM – 10:30 AM PST | Room 154 (Upper Mezzanine South)
UVC LEDs: increase in optical performance through an optimized potting material
Presenter: Prof. Thomas Ortlepp
Authors: I. Käpplinger1, T. Schildhauer1, D. Mitrenga1, G. Leibeling2, M. Schädel1, T. Ortlepp1
1) CiS Forschungsinstitut für Mikrosensorik GmbH, Konrad-Zuse-Str. 14, 99099 Erfurt, Germany
2) JenCAPS Technology GmbH, Otto-Schott-Str. 15, 07745 Jena, Germany