Deep UV-LEDs based on group Ill-nitride for water disinfection applications

摘要

1. UV-LED device represents an attractive substitute to the commercial UV light sources for water disinfection applications because of its emission wavelengths tunability, compact form, non-toxicity, long lifetime and low power consumption. 2. Bench-scale tests have demonstrated the effectiveness of UV-LEDs on different microorganisms using low flow rate but higher optical powers are required for wide scale implementation. 3. By improving device design and material quality should be possible to achieve adequate value of EQE and to customize it for appropriate microbial target 4. Nitride based UV-LEDs have advanced from less than 0.1% EQE to 14% over the past ten years and further improvements are expected in the future as occurred for visible LEDs.