| 摘要 |
PROBLEM TO BE SOLVED: To obtain a light-emitting element, capable of emitting a white light at a low operating voltage and high emission efficiency by a single element. SOLUTION: This element is constituted, having a laminate structure involving a light-emitting layer 4 made of a GaN compound semiconductor containing at least In and Ga, the light-emitting layer 4 has a region of comparatively low In proportion and region of a comparatively high In proportion, and these regions each emit blue and yellow lights, which are mixed to obtain a white light from the entire light-emitting layer 4. |
