UVC LED
Ultraviolet radiation from the sun includes UVA, UVB, and UVC bands. Ultraviolet-C (UV-C) wavelength ranges from 100 nm to 280 nm and the shorter the wavelength the more dangerous it is. Wavelength below 200 nm is vacuum ultraviolet and can be absorbed by air, while wavelength ranges between 200 nm and 280 nm can pass through the atmosphere; however the ozone layer acts as a barrier so only a small amount of UV-C reach the earth’s surface.
UV can destroy the DNA (deoxyribonucleic acid) or RNA (ribonucleic acid) molecular structure of microorganisms so that bacteria is destroyed or unable to reproduce, in order to achieve the purpose of sterilization and disinfection. UV-C is the shortest wavelength of the UV light and has the strongest destructive effect on DNA. It is extremely harmful to bacteria, viruses, microorganisms, molds, unicellular algae, and other microorganisms. Generally, the sterilization effect can be achieved within 1~2 seconds after UV-C (UV-C wavelength 200-280 nm) irradiation.
Our UVC LED technology is derived from the work of the 2014 Nobel Prize in Physics laureates, Professors Isamu Akasaki and Hiroshi Amano. It features high luminous efficiency, low heat generation, low power consumption, long lifespan, durability, mercury-free, ozone-free, and single-wavelength advantages. This technology directly disrupts the DNA and RNA structures of microorganisms, preventing the formation of essential proteins, thereby causing immediate death or loss of reproductive capability.
In May 2020, experiments conducted by Miyazaki University proved that UVC LEDs could effectively suppress the infectivity of the Covid-19 virus by over 99.9%. Further experiments in June 2021 demonstrated that UVC LEDs are equally effective against Covid-19 variants.
Nikkiso & NKFG have successfully developed the world’s smallest UVC LED air disinfection system using high-power UVC LED technology.
UVC LEDs offer an instant on/off, mercury-free disinfection solution. Their compact size allows for flexible application in various disinfection systems. By utilizing specific wavelengths and custom UVC LED modules, they can destroy the DNA structure of particular pathogens, achieving effective sterilization.
The Environmental Protection Administration has set regulations for indoor air quality, including a requirement that indoor air should not contain more than 1500 CFU/m3 of airborne bacteria. Our UVC disinfection equipment is suitable for a variety of settings, such as universities, healthcare facilities, social welfare organizations, government offices, rail transport, civil aviation terminals, metro stations, shopping malls, providing clean and sterile air in enclosed indoor environments.
Applications of UVC LED air treatment and sterilization:
• Enclosed spaces
• Circulating airflow
• Food processing
• Medical and biotech industries
• Advanced sterilization after HEPA and activated carbon filtration
Each UVC LED module can be equipped with a single wavelength and assembled to provide multi-wavelength coverage. By homogenizing the LED light source and using treated surfaces, a uniform intensity distribution is achieved to effectively kill pathogens.
UVC LEDs with wavelengths between 265nm and 285nm are commonly used for sterilization, but other wavelengths can also be utilized. One of the advantages of UVC LEDs is the ability to select almost any wavelength, allowing for targeted pathogen reduction. In May 2020, a joint experiment conducted by Miyazaki University and Nikkiso studied the sterilization effects of deep ultraviolet (UVC) LEDs. In the experiment, UVC LED light was irradiated on a liquid containing the novel coronavirus for thirty seconds. After three days of incubation, it was confirmed that the virus’s infectivity was reduced by over 99.9%. Miyazaki University noted that this technology is expected to be applied in preventing infections in healthcare facilities.
UVC LEDs are small, robust, lightweight, and easy to install, making them an ideal choice for portable sterilization.
UVC LED surface treatment sterilization applications:
• Medical equipment
• personal items
• Product packaging
• Industrial production lines
• Object surface
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