RIKEN and Matsushita Electric Drive developed a high power and high efficiency ultraviolet LED

Japan Institute of physical chemistry and Matsushita Electric announced that with the wavelength of 282nm UV LED, the world's largest power 10.6mW room temperature continuous luminescence has been confirmed. Thereby, the miniaturization of germicidal lamp for killing Escherichia coli, etc. can be realized. Prior to the 280nm wavelength region, the maximum power for the University of South Carolina research group 8mW. The UV LED added a few percent indium (In) in the N (Al), gallium (Ga) and nitrogen (as) semiconductors. The addition of In increases the hole concentration of P type semiconductor, and the power is increased by about 5 times. In addition, the composition of Al increased to more than 50%, vector quantum well light emitting layer into the Si method, the 280nm wavelength region internal quantum efficiency of about 10% was only significantly increased to more than 80% (presumed). The results will be held on July 6, 2008 to 9 days in the Izu Shuzenji organized the "Second International Symposium on nitride semiconductor crystal growth (ISGN-2)" issued.

Source: Nikkei BP