Japanese researchers develop UV LED emitting at 227.5nm

Sept. 13, 2007
Researchers at Riken and Saitama University have developed a viable LED with an extremely short wavelength.
Courtesy of Semiconductor Today

A joint research group led by Japan's Institute of Physical and Chemical Research (Riken) and Saitama University has developed a UV LED with an emission wavelength as short as 227.5nm and an output of 0.15mW.

Previously, another research group had reported the development of a UV LED with an emission wavelength of 210nm, but its output was only 0.02 µW.

In addition, the Riken and Saitama University research group has prototyped UV LEDs with wavelengths and outputs, respectively, of 253nm and 1mW, 261nm and 1.65mW, and 273nm and 3.3mW.

The research group says that it now intends to enhance the efficiency and output of the latest UV LED further, with a view to applications such as sterilization, water purification, medical care and high-speed degrading of pollutants.

Read the full story on the Semiconductor Today website.