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关于UV LED,今天来说点不一样的国外新研究与新材料

如果要说灯饰市场上半年最火热的产品,紫外线杀菌灯一定是其中的佼佼者,在新冠疫情的冲击下和人们对生活质量的追求,对健康卫生条件的要求也随之而提高,而也让紫外线杀菌灯也迎来了它新一轮的采购浪潮。  

 

紫外线消毒杀菌是古老而又行之有效的方法,其原理就是利用高能量的紫外光打断DNA双螺旋链,从而实现到对细菌和病毒的灭活。  

 

但紫外线实现有效杀菌消毒并不简单,要注意紫外线光源的波长、照射剂量和时间,即必须是波长280nm以下的UVC波段的深紫外光,对不同的细菌和病毒要满足一定的照射量和时间,否则不能达到灭活杀菌的效果。

严格来说,市面上所说的UV LED包括长短波的紫外线LED,UVC LED则专用于短波,其产品特性更适合人杀菌灯用。但目前行业内大多数都默认两者等同。

 

有研究表明

UVC LED可有效杀灭新型冠状病毒

 

 

今年以来,全球多方力量投入研发有效杀灭新型冠状病毒的方法。在UVC杀菌消毒领域,已有的不少厂商和专业研究学者取得了初步成效,如首尔伟傲世、日本Ushio、日本知名大学和美国知名大学等。

 

近日,又有新的研究传递出积极的讯号。据外媒报道,德国UV技术开发商Dr. Hönle通过开展相关研究发现,UV单元能够在数秒内杀死冠状病毒,杀菌率达99.99%。

利用UVC辐射对周围空气和表面进行杀菌消毒能够可靠、有效降低新型冠状病毒的风险,结合各种搭载UVC技术的产品,消毒场所可扩展至空气杀菌、表面杀菌及其他更多的应用场景。

来自日本宫崎大学和日机装合作,共同研究UVC LED灯的杀菌效果


在研究中,研究员采用UVC LED灯照射含有新型冠状病毒的液体30秒,三天后发现新型冠状病毒的传染力降低了99.9%以上,初步计划能够用于防止医院内部感染。

 

新型材料帮助UV LED 降本提效

 

另一方面,现阶段在UV杀菌消毒领域,不少厂商和研究者频频传来捷报,都取得了不小的研究成果。

但由于受限于光效低、成本高等问题,UV LED如何大规模商用化是个难题,同时如何通过降低成本和提高光效达到最佳理想的效果也是业内人士所渴望解决的问题。


使用合适材料对提高UV LED性能来说非常关键。


据外媒报道,美国宾夕法尼亚州立大学、美国明尼苏达大学以及日本东京大学和日本东北大学共同研究发现一种发射UV光的新型透明导体材料,或可解决目前UV LED技术效率低的问题。

研究发现解决UV LED效率低的方法是使用新型透明导体材料——酸锶材料

 

 

通过使用铌酸锶材料,采用射法生长薄膜,进而测试铌酸锶薄膜作为UV透明导体材料的性能,结果表明有望以低成本将这种新型材料集成于UV LED中,并实现高质量消毒杀菌

通过新型材料的发现,UV LED的应用形式也将越来越多样,客制化的产品将更加丰富,可以应对各种应用场景。

 

特别是公共场所包括电影院、运动竞技场等人员密集的场所,以及公交车、地铁和飞机等公共运输工具的应用,非常有利于降低和隔绝病毒细菌的扩散与传播。

 

UV LED 广阔的发展前景

 

 

事实上,UV LED将替代传统紫外线汞灯成为主流发展。

 

国际禁用水银(汞)的《水俣公约》已于2017年8月正式生效,明确表示从2020年起,各国应当逐渐减少含汞产品的生产和贸易。包括日本、中国 、欧盟等在内的90多个国家在家用、工业用等紫外线灯管领域,正需要UV LED来替换这些紫外线水银灯管,这也加速激励了UV LED市场在全球各地的起飞。

而随着技术的不断进步,UV LED的性价比和发光效率与汞灯的距离会越来越小,让UV LED惠及大众。

 

 

据《2019深紫外线LED应用市场报告》显示,2018年全球UV LED市场规模达2.99亿美,预计到2023年市场规模将达9.91亿美金,2018-2023年复合增长率达到27%。UV LED广阔的发展前景逐渐吸引厂家的进入。

 

If you want to say that the hottest products in the first half of the lighting market, ultraviolet sterilization lamps must be among the best. Under the impact of the new crown epidemic and people's pursuit of quality of life, the requirements for health and sanitation conditions have also increased, and also Let ultraviolet germicidal lamp also ushered in its new wave of purchase.
 
Ultraviolet disinfection is an ancient and effective method. Its principle is to use high-energy ultraviolet light to break the DNA double helix, so as to achieve the inactivation of bacteria and viruses.
 
However, it is not easy to achieve effective sterilization and disinfection by ultraviolet rays. It is necessary to pay attention to the wavelength, irradiation dose and time of the ultraviolet light source, that is, it must be deep ultraviolet light in the UVC band below 280nm, and must meet a certain amount of irradiation and time for different bacteria and viruses Otherwise, the effect of inactivation and sterilization cannot be achieved.
 
Strictly speaking, the UV LEDs on the market include long- and short-wave ultraviolet LEDs, and UVC LEDs are dedicated to short-wave, and their product characteristics are more suitable for human sterilization lamps. However, most of the industry currently assumes that the two are equivalent.
 
Research has shown that
UVC LED can effectively kill new coronavirus
 
Since this year, many forces around the world have invested in the development of methods to effectively kill new coronaviruses. In the field of UVC sterilization and disinfection, many existing manufacturers and professional research scholars have achieved initial results, such as Seoul Weishi, Ushio in Japan, well-known universities in Japan, and well-known universities in the United States.
 
Recently, new research has sent positive signals. According to foreign media reports, Dr. Hönle, a German UV technology developer, has conducted relevant research and found that the UV unit can kill coronavirus within seconds, with a sterilization rate of 99.99%.
 
 
The use of UVC radiation to sterilize the surrounding air and surfaces can reliably and effectively reduce the risk of new coronaviruses. Combined with various products equipped with UVC technology, the disinfection place can be extended to air sterilization, surface sterilization and other more application scenarios.
 
From Japan Miyazaki University and Nikkiso cooperate to jointly study the sterilization effect of UVC LED lamps.
In the study, the researchers used a UVC LED lamp to irradiate the liquid containing the new coronavirus for 30 seconds. Three days later, they found that the infectivity of the new coronavirus was reduced by more than 99.9%. The preliminary plan can be used to prevent infection in the hospital.
 
New materials help UV LED reduce costs and improve efficiency
 
On the other hand, at this stage in the field of UV sterilization and disinfection, many manufacturers and researchers have frequently reported good results, and they have achieved considerable research results.
 
However, due to the problems of low light efficiency and high cost, how to achieve large-scale commercialization of UV LEDs is a problem. At the same time, how to reduce costs and improve light efficiency to achieve the best ideal effect is also a problem that people in the industry are eager to solve.
 
The use of suitable materials is critical to improve the performance of UV LEDs.
 
According to foreign media reports, the Pennsylvania State University of the United States, the University of Minnesota, the University of Tokyo and the Northeastern University of Japan have jointly discovered a new type of transparent conductor material that emits UV light, or may solve the problem of low efficiency of the current UV LED technology.
 
The study found that the solution to the low efficiency of UV LEDs is to use a new type of transparent conductor material-strontium acid material.
Through the use of strontium niobate material, the film growth method was used to test the performance of strontium niobate film as a UV transparent conductor material. The results show that it is expected to integrate this new material into UV LEDs at low cost and achieve high-quality disinfection and sterilization .
 
Through the discovery of new materials, the application forms of UV LEDs will also become more diverse, and customized products will be more abundant, which can respond to various application scenarios.
 
In particular, public places include movie theaters, sports arenas, and other crowded places, as well as the use of public transportation such as buses, subways, and airplanes, which is very conducive to reducing and isolating the spread and spread of viral bacteria.
 
UV LED broad development prospects
 
In fact, UV LED will replace the traditional ultraviolet mercury lamp and become the mainstream development.
The Minamata Convention, which bans mercury (mercury) internationally, officially entered into force in August 2017. It clearly states that from 2020, countries should gradually reduce the production and trade of mercury-containing products. More than 90 countries including Japan, China, the European Union, etc. in the field of household, industrial and other ultraviolet lamps, UV LEDs are needed to replace these ultraviolet mercury lamps, which has also accelerated the UV LED market to take off around the world.
 
With the continuous advancement of technology, the distance between the cost performance and luminous efficiency of UV LEDs and mercury lamps will become smaller and smaller, which will allow UV LEDs to benefit the public.
 

 

According to the "2019 Deep UV LED Application Market Report", the global UV LED market reached US$299 million in 2018, and the market size is expected to reach US$791 million by 2023, with a compound growth rate of 27% in 2018-2023. The broad development prospects of UV LED gradually attract manufacturers to enter.