In connection with the COVID-19 pandemic, there is an urgent need for disinfecting devices that can be used both indoors and in transport. Currently, most common of these are ultraviolet (UV) germicidal lamps. However, they have significant disadvantages, such as short service life, presence mercury, lack flexible control, large dimensions, etc. The paper analyzes sources UV radiation to find a...

Despite graphene being an attractive transparent conductive electrode for semiconductor deep ultraviolet (UV) light emitting diodes (LEDs), there have been no experimental demonstrations of any kind UV LEDs using a electrode. Moreover, although aluminum gallium nitride (AlGaN) alloys in the format nanowires are appealing platform surface-emitting vertical LEDs, particular, at short wavelengths,...

There are numerous applications for deep UV AlGaN Light-Emitting Diodes (LEDs) in virus inactivation, air and water purification, sterilization, bioagent detection polymer curing. The long-term stability of these LEDs is also interest long-duration space missions such as the Laser Interferometer Space Antenna (LISA), first gravitational wave detector space. We review literature on aging devices...

This paper reports the development of a low-cost, portable, light-emitting diode (LED)-based UV exposure system for photolithography. The major system components include UV-LEDs, microcontroller, digital-to-analog (D/A) converter and LED control circuitry. The UV-LED lithography system is also equipped with a digital user interface (LCD and keypad) and permits accurate electronic control on the...