A powerful LED can effectively disinfect surfaces while keeping people safe. Physicists from the Institute of Physical Chemistry in Japan have designed an efficient LED that is lethal to microorganisms and viruses, but safe for humans. One day, it can help countries overcome the shadow of pandemics by killing pathogens in rooms filled with people. Most LEDs emit visible light, but physicists at the Institute of Physical and Chemical Sciences have created an LED that emits light in a narrow area of far ultraviolet light, which is safe for humans but deadly to viruses and bacteria UV sterilization lamps are extremely effective in eliminating bacteria and viruses. In fact, they are often used in hospitals to disinfect surfaces and medical equipment. This type of lamp can be constructed with LED to make it energy-efficient. However, the ultraviolet rays generated by these LEDs can damage DNA within a certain range, so they cannot be used around humans. People are looking to develop efficient LEDs that emit light within a narrow far ultraviolet band, seemingly capable of both effective disinfection and human safety. LED sterilization lamps that operate without human intervention are typically made of aluminum, gallium, and nitrogen. By increasing the amount of aluminum they contain, these LEDs can be modified to operate in wavelength regions that are safe for humans. This method has been used before, but it resulted in a significant reduction in power.
