Deep-UV LEDs 280nm

5) Deep-UV LEDs set for production ramp-up
US start-up Sensor Electronic Technology says it is scaling up production of LEDs emitting at 280 nm.

See http://compoundsemiconductor.net/articles/news/8/9/3

Wonderful, I've waited for that!

Hmm, I thought that 395 was UV?

what nm IS UV?

I assume these are closer to true UV, with less visable light?

[ QUOTE ]
jtice said:
Hmm, I thought that 395 was UV?

what nm IS UV?

I assume these are closer to true UV, with less visable light?

[/ QUOTE ]
UV is generally considered to be EM radiation with wavelengths ranging from ~100nm to 400nm.
Close to 400nm (such as 395nm), and the LED will emit some visible radiation that would appear as a dull purple glow. Deeper into the UV (such as 365nm), the LED would emit a dull whitish glow; the main portion of the radiation would be invisible.

Most "UV" LEDs emit at 365nm to 405nm.
This is all in the UVA band.

UVA is generally considered to be wavelengths from 320nm to 400nm.

UVB is generally considered to be wavelengths from 290nm to 320nm.

UVC is generally considered to be wavelengths from 100nm to 290nm.

So the 280nmn LED would be considered to be a long UVC emitter.
UVC is icky poo, and protective goggles should be used when experimenting with this LED.

Also, 10-100nm [or sometimes 10-200nm] is referred to as vacuum UV. So called since it can travel in a vacuum but is readily absorbed by air.