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一文搞懂222nm 254nm 275nm 253.7nm 405nm深紫外杀菌波段
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新闻资讯
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发布时间：
2020-05-30
【摘要】：
222nm 254nm 275nm 253.7nm 405nm深紫外杀菌波段
“请问你们公司有222nm的UVC LED吗？”
最近接到最多的客户咨询就是222nm波长深紫外灯珠。因国外研究机构实验证实了这一波长的UVC灭菌且对皮肤无害，一时间222nm成了媒体报道和市场关注的热点。这一幕在年初的时候也出现过，只是那时候大家都找254nm的UVC LED。造成这种现象的原因主要有两个，一是紫外线杀菌市场太火热，各行业纷纷涌入，二是UVC LED处于初级发展阶段，市场认知度不够。
大家熟知的紫外线杀菌波段有254nm、275nm、222nm、405nm，为了让朋友们更好的认识这几个波段，今天跟大家聊聊这个话题。
254NM
这个波段常见于紫外线汞灯，它是利用低气压的汞蒸气在放电过程中辐射紫外线，低压汞蒸气主要产生254nm和185nm紫外线，汞灯起杀菌作用的特征波长是253.7nm，其辐射功率达到瓦（W）量级，在大空间环境中有大范围应用，有良好的杀菌效果。
紫外线汞灯在过去曾被认为是消毒和灭菌的最佳选择，包括现在市场上大部分的杀菌灯依旧是254nm汞灯。但是汞灯与紫外LED灯相比，尺寸大、能耗高、预热时间长、含汞等弱点，在国际性《水俣公约》影响下，将在较短的时间内退出历史舞台，未来深紫外LED将有巨大的应用空间。
275NM
深紫外LED不同于汞灯，深紫外LED的主流产品特征波长为275-280nm，253.7nm和275nm分别在DNA吸收峰值波长265nm两侧，具有几乎相同的DNA吸收值，因此具有几乎相同的杀菌效率。
紫外LED因具备小尺寸、低功耗、即点即亮等优点，可将紫外线封闭在小空间中，紫外线泄漏易于防控，可做到人机共存，在实际应用中具备明显优势。随着紫外LED技术的进步，更小、更强大、无毒、寿命更长、更节能，并且允许的开关次数更多的UVC LED成为杀菌光源的全新选择。值得一提的是，近日，将推出一款255nm UVC LED,有望在下半年实现量产。
222NM
这个波段就是文章开头提到，一时间大家都在找的222nm杀菌LED。由于近期几所国外知名大学和机构的研究人员纷纷发现，波长222nm的紫外线无法穿透人体皮肤角质层，对人体无害，且具有与传统紫外线灯同等的杀菌效果，这一消息引得市场争相报道和关注。而实际的情况是，此工作尚处于实验室研究阶段，距离产业化应用还有很长的路要走。所以，请大家稍安勿躁，相信以后会面世的。
405NM
405nm的紫光（也可划入UVA范围）具备一定的杀菌能力，研究人员采用18150mW的405nm光源在50cm距离照射大肠杆菌9小时，获得99.9%的杀菌效率。该种方式杀菌效率较低，所需的光源功率高，散热难，大大限制了其广泛应用。
综合以上各种波段简单分析，相信大家对这几个波段有了基本认识。紫外线杀菌具有广谱、高效、环保等优良特点，是最适合日常生活使用的杀菌方式，银月光科技相信紫外LED光源将在未来的生活、生产中扮演重要角色。
One article teaches you to understand 222nm 254nm 275nm 253.7nm 405nm deep UV sterilization band
"Do you have a 222nm UVC led?"
Recently received the most customer consultation is the 222nm wavelength deep UV lamp beads. Because the experiments of foreign research institutions confirmed that this wavelength of UVC sterilization and harmless to skin, 222nm became a hot spot of media reports and market attention. This scene also appeared at the beginning of the year, but at that time, everyone looked for 254nm UVC led. There are two main reasons for this phenomenon. One is that the UV sterilization market is too hot, and various industries are pouring in one after another. The other is that UVC LED is in the primary development stage, and the market awareness is not enough.
We are familiar with UV sterilization bands of 254nm, 275nm, 222nm and 405nm. In order to let our friends better understand these bands, we will talk about this topic with you today.
254NM
This band is commonly used in ultraviolet mercury lamp. It uses the low-pressure mercury vapor to radiate ultraviolet light during the discharge process. The low-pressure mercury vapor mainly produces 254nm and 185nm ultraviolet light. The characteristic wavelength of the mercury lamp is 253.7nm, and its radiation power reaches the order of watt (W). It has a wide range of applications in large space environment, and has a good sterilization effect.
In the past, ultraviolet mercury lamp was considered as the best choice for disinfection and sterilization, including now most of the sterilization lamps on the market are still 254nm mercury lamp. However, compared with UV LED lamp, mercury lamp has many disadvantages, such as large size, high energy consumption, long preheating time, mercury and so on. Under the influence of international Minamata convention, mercury lamp will withdraw from the historical stage in a short time. In the future, deep UV LED will have a huge application space.
275NM
Deep UV LED is different from mercury lamp. The main product characteristic wavelengths of deep UV LED are 275-280nm, 253.7nm and 275nm respectively on the two sides of DNA absorption peak wavelength 265nm, which have almost the same DNA absorption value, so it has almost the same sterilization efficiency.
UV LED has the advantages of small size, low power consumption, instant lighting and so on. It can seal the UV in a small space. UV leakage is easy to prevent and control. It can achieve the coexistence of human and computer, and has obvious advantages in practical application. With the progress of UV LED technology, the UVC led with smaller, more powerful, non-toxic, longer life and more energy-saving, and more switch times allowed has become a new choice of sterilization light source. It is worth mentioning that recently,we developed and launched a 255nm UVC led, which is expected to achieve mass production in the second half of the year.
222NM
This band is mentioned at the beginning of the article. For a while, we are looking for 222nm bactericidal led. Recently, researchers from several well-known foreign universities and institutions have found that UV with wavelength of 222nm can not penetrate the cuticle of human skin, which is harmless to human body and has the same bactericidal effect as traditional UV lamp. This news has attracted the attention of the market. But the actual situation is that this work is still in the laboratory research stage, and there is still a long way to go before industrialization.
405NM
The 405nm violet light (which can also be classified into the range of UVA) has a certain bactericidal ability. Researchers used 18150mw 405nm light source to irradiate e E.coli at a distance of 50cm for 9 hours, and obtained 99.9% bactericidal efficiency. This method has low sterilization efficiency, high power of light source and difficult heat dissipation, which greatly limits its wide application.
Based on the above analysis, I believe you have a basic understanding of these bands. UV sterilization has the advantages of broad spectrum, high efficiency and environmental protection, which is the most suitable sterilization method for daily life. Silvermoon technology believes that UV LED light source will play an important role in the future life and production.
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