that wavelength penetrates the skin. you need to be around 222nm for human safety
uviquity has prototypes of a 220nm solid state chip they’ll commercialize next year (we’re an investor). a single far-uvc photon will destroy the covid virus.
The current state of the art UVC (short wave, e.g. 255nm) LEDs have very low efficiency, compared to UVA (long wave, e.g. 365nm). How efficient are these 220nm solid state chips?
Do they emit other frequencies, or are they monochromatic?
Yes, however the safety-profile is quite the opposite to 222nm.
https://www.larsonelectronics.com/news/1763
https://uvmedico.com/far-uvc-light
that wavelength penetrates the skin. you need to be around 222nm for human safety
uviquity has prototypes of a 220nm solid state chip they’ll commercialize next year (we’re an investor). a single far-uvc photon will destroy the covid virus.
https://uviquity.com/
Cool technology, thanks for posting.
The current state of the art UVC (short wave, e.g. 255nm) LEDs have very low efficiency, compared to UVA (long wave, e.g. 365nm). How efficient are these 220nm solid state chips?
Do they emit other frequencies, or are they monochromatic?
This is Far-UVC (typically 222 nm). Regular UVC can cause eye damage.
And skin damage
Evolution has us covered.
https://pmc.ncbi.nlm.nih.gov/articles/PMC3010660/
Do you know a good source for finding the latest, most efficient LEDs for DIY projects?
This is an affordable 255nm UVC flashlight (buy filter separately due to US patent bs):
https://convoylight.com/products/gray-c8-uvc-255nm-uvb-310nm