Applications for UV LEDs

 

LEDs have many advantages when compared to conventional UV light sources such as mercury discharge lamps and xenon lamps. Among them, the most prominent is the possibility to set the emission wavelength to the desired value by adjusting the material composition. Furthermore, LEDs are very compact, have a long life time, can be dimmed, rapidly switched and emit the full power immediately after switching them on. They operate on a low dc bias voltage and thus can be operated by battery or solar cells, allowing for point-of-use applications. Contrary to bulky and fragile discharge lamps, the LEDs don’t emit thermal radiation.

The most important fields of apllication are listed below:

  • Disinfection of water, air, and surfaces by breaking thymine-adenine bonds in the DNA / RNA strands of bacteria
  • Medical applications such as treatment of skin deseases like psoriasis, vitiligo, and others
  • Sensing applications in medicine, life science, counterfeight detecting, and security to detect germs, gases, amino acids, structural proteins, enzymes, vitamins, and many chemical substances
  • Plant growth lighting
  • Production and printing applications, e.g. hardening of polymers, curing of inks and resins, and photo lithography

A more detailed description of those applications, the advantages of UV LEDs for each field of application, and the technology behind our LEDs is given in the article "Nitride-Based UV-LEDs and Their Application" published in "Optik & Photonik" by Wiley which can be accessed free of charge. (Download article)