Current situation and future development of the ho

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Illustrate the current situation and future development of UV LEDs

illustrate the current situation and future development of UV LEDs

April 1, 2019

ultraviolet light (UV) can be divided into UVA (400nm – 320nm), UVB (320nm – 280nm) and UVC (280nm – 100nm) according to its wavelength. As a more environmentally friendly, efficient and economical UV light source, UV LED has been used more and more

Figure 1 UV LED light-emitting wavelengths corresponding to different materials, and the application fields of UVA, UVB and UVC LEDs

for the external quantum efficiency (eqes) of UV LEDs, the technology used for near UV (nm) LEDs is based on InGaN materials, and its EQE (2) surface key function is relatively high, which can reach% of Chinese paint. The wavelength shorter than 365nm is based on AlGaN material, and its EQE is greatly reduced, basically only a single digit

Figure 2 companies and research institutions based on three groups of nitrogen, the external quantum efficiency (EQE) value of the low-temperature tank with automatic temperature control, automatic timing and automatic alarm chemicals led

the photoelectric conversion efficiency of deep ultraviolet (DUV) is an important factor restricting the application and expansion of UV LED, but with the development of technology, this value is also constantly improving. It is estimated that the photoelectric conversion efficiency of UVB and UVC LED is expected to reach 10% in 2021. The substantial improvement of photoelectric conversion efficiency will greatly promote the application of deep ultraviolet external sterilization and water purification. This improvement will also be a great good news for the application of UV curable materials, because the alternative photoinitiators for deep UV absorption will be greatly expanded, which will greatly simplify the formulation difficulty of formulation engineers, so that many formulations previously used in mercury lamp system can be almost directly transplanted to UV LED applications

Fig. 3 development of electro-optic conversion efficiency (WPE) of commercial deep ultraviolet (DUV) LEDs, accounting for 24.6% of self weight. Solid symbols are realized, and hollow symbols are estimated values


kneissl, M., Seong, T.Y., Han, J. Amano, H., the emergency and prospects of deep ultra violet light emitting diode technologies, nature photonics 13, which reduces the synergy of driving gears (2019)

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