The most recent customer inquiry is the 222nm wavelength deep ultraviolet lamp beads. Because foreign research institutes have proved that this wavelength of UVC is sterile and harmless to the skin, 222nm has become a hot spot in media reports and market attention for a while. This scene also appeared at the beginning of the year, but at that time everyone was looking for 254nm UVC LEDs. There are two main reasons for this phenomenon. One is that the ultraviolet sterilization market is too hot, and various industries have poured in. The second is that UVC LED is in the initial stage of development and the market awareness is insufficient.
The well-known ultraviolet sterilization bands are 254nm, 275nm, 222nm, 405nm. In order to let friends know these bands better, today GMKJ Technology will talk to you about this topic.
1. 254NM
This band is commonly used in ultraviolet mercury lamps. It uses low-pressure mercury vapor to radiate ultraviolet rays during discharge. Low-pressure mercury vapor mainly produces 254nm and 185nm ultraviolet rays. The characteristic wavelength of the mercury lamp for sterilization is 253.7nm, and its radiation power reaches watts. (W) level, has a wide range of applications in a large space environment, and has a good sterilization effect.
Ultraviolet mercury lamps were considered the best choice for disinfection and sterilization in the past, including most germicidal lamps on the market today are still 254nm mercury lamps. However, compared with UV LED lamps, mercury lamps have the disadvantages of large size, high energy consumption, long warm-up time, and mercury content. Under the influence of the international "Minamata Convention", they will withdraw from the stage of history in a relatively short period of time. UV LED will have a huge application space.
2. 275NM
Deep ultraviolet LEDs are different from mercury lamps. The mainstream products of deep ultraviolet LEDs have characteristic wavelengths of 275-280nm. 253.7nm and 275nm are on both sides of the DNA absorption peak wavelength of 265nm respectively. They have almost the same DNA absorption value, so they have almost the same sterilization efficiency. .
Ultraviolet LED has the advantages of small size, low power consumption, instant light and other advantages. It can enclose ultraviolet rays in a small space. The leakage of ultraviolet rays is easy to prevent and control, and it can achieve the coexistence of man and machine. It has obvious advantages in practical applications. With the advancement of UV LED technology, UVC LEDs that are smaller, more powerful, non-toxic, longer-lived, more energy-efficient, and allow more switching times have become a new choice for germicidal light sources. It is worth mentioning that recently, GMKJ Technology has developed and launched a 255nm UVC LED, which is expected to be mass-produced in the second half of the year.
3. 222NM
This band is mentioned at the beginning of the article. For a while, everyone was looking for a 222nm germicidal LED. Recently, researchers from several well-known foreign universities and institutions have discovered that ultraviolet light with a wavelength of 222nm cannot penetrate the stratum corneum of human skin, is harmless to the human body, and has the same sterilization effect as traditional ultraviolet lamps. This news has attracted the market. Report and follow. The actual situation is that this work is still in the laboratory research stage, and there is still a long way to go before industrial application. So, please be safe and restless (don't waste time looking for it).
4. 405NM
The 405nm purple light (which can also be included in the UVA range) has a certain sterilization ability. The researchers used a 18150mW 405nm light source to irradiate E. coli at a distance of 50cm for 9 hours to obtain a sterilization efficiency of 99.9%. The sterilization efficiency of this method is low, the required light source power is high, and the heat dissipation is difficult, which greatly limits its wide application.
Based on the simple analysis of the various bands above, I believe everyone has a basic understanding of these bands. Ultraviolet sterilization has broad-spectrum, high-efficiency, environmental protection and other excellent characteristics. It is the most suitable sterilization method for daily life. GMKJ Technology believes that ultraviolet LED light sources will play an important role in future life and production.
