| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a white LED of high luminance having a simple structure in which a fluorescent substance is not required. <P>SOLUTION: A nitride epitaxial light emitting layer 3 for generating a blue light having a luminescence wavelength in 400-485 nm region, and an n-type nitride semiconductor light emitting layer 4 for generating a yellow light having a luminescence wavelength in 550-580 nm region by absorbing this blue light, are laminated on a sapphire substrate 1 by a sequential growth. Then, these blue and yellow lights are color mixed to obtain a white light. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
