The 28th Guangzhou International Lighting Exhibition (Guangya Exhibition) will be held at the China Import and Export Commodity Fair from June 9 to 12, 2023. It is committed to creating theme demonstration halls such as intelligent health cross-border, biolight, meta-universe immersive cultural tourism, and smart street lights. It will continue to expand the influence of LED packaging, driver power supply, home and commercial space brand halls, and welcome the new industry revolution with the industry!
Guangzhou International Lighting Exhibition will share with you the cutting-edge information on LED technology today. The following article is compiled and compiled by Experts UV:
On October 17, three physicists from the Japanese Institute of Physics and Chemistry (RIKEN) designed an efficient deep ultraviolet LED . This LED can disinfect microorganisms and viruses, but is safe for humans at the same time.
The traditional ultraviolet LED lamp that is harmless to the human body is made of aluminum, gallium and nitrogen. By increasing the content of aluminum, the LED works in the band that is harmless to the human body. However, this reduces the output power of the LED and greatly weakens the sterilization ability of the LED. To solve this problem, three researchers, Masafumi Jo, Yuri Itokazu and Hideki Hirayama, designed a multi-layer LED with output power of 10 times that of traditional LEDs.
Masafumi Jo
They sandwiched these layers together, filled multiple layers with different proportions of aluminum, and added a small amount of silicon or magnesium to some layers, which effectively created a barrier route for the movement of the electrons, hindering the movement of the material, thereby effectively capturing it and increasing the amount of luminescence. The biggest difficulty in this design lies in precisely controlling the thickness of each layer. If the thickness can be controlled well, the output power of this LED will have more room for improvement.
However, deep ultraviolet LEDs are still a certain distance away from achieving the goal of large-scale commercial use, because deep ultraviolet LEDs not only need to solve safety problems, but also cost problems. A research institution once compared the prices of UV-C LEDs and UV-C lamps and drew a cost-effective coefficient chart between the two:
This coefficient shows how many times the UV-C LED light source is more expensive than UV-C lamps, and the unit is euro/watt. Currently, the coefficient is 100, but the chart shows that the cost-effectiveness of UV-C LEDs will increase significantly in the future and are getting closer to the cost of traditional lamps. Many people believe that only when UV-C LEDs reach the same cost-effectiveness level as traditional low-pressure mercury lamps can they gain a competitive advantage in the disinfection market. But the research institute said that this view is not necessarily correct.
From the case where other LED light sources replace traditional light sources, the judgment criteria for judging whether LED light sources form a replacement is not only cost-effective, but should be combined with the entire system. In LED systems, energy costs account for a small proportion, while UV-C light sources account for a large proportion. Therefore, for systems with limited light collection, the characteristics of high radiation or point light sources are obvious.
With the advancement of technology, UV-C LEDs will appear more and more in various application scenarios. By 2025, the traditional UV-C lighting device market will be dominated by UV-C LEDs.
As a weather vane for lighting and LED industries, Guangzhou International Lighting Exhibition will continue to provide you with the latest industry information and closely monitor new developments in the lighting industry. The next Light Asia Exhibition will meet you in Guangzhou from June 9 to 12, 2023. See you!
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