Abstract
Owing to the enhanced benefits of ultraviolet light-emitting diodes (UV LEDs) over conventional mercury lamps, the latter have been considered suitable for replacement, contributing to the growth of UV-related markets. Due to their broad applications and advanced development, many new investigations have focused on UV LEDs. However, these LEDs face challenges such as high costs, low efficiency, and limited output power, which hinder their widespread adoption. This paper discusses the potential for UV LEDs to replace traditional mercury-based UV light sources, considering environmental impact, safety, energy consumption, and longevity, along with the need for new solutions. Key applications of UV LEDs in water treatment, medical disinfection, and optical communication are explored, highlighting their potential in large-scale water treatment systems and bandwidth prospects in communication. The paper also addresses challenges such as high dislocation density and introduces directions for optimizing electrode and P-type layer structures, as well as new methods and materials. Lastly, future research directions for UV LEDs are outlined.
Published Version
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