Patent ID: 7772587

Claim:
A silicon-based light emitting diode comprising: a substrate with a lower electrode layer on a lower surface thereof; a lower doped layer that is formed on an upper surface of the substrate and supplies carriers to an emitting layer; the emitting layer that is a silicon semiconductor layer including silicon quantum dots or nanodots formed on the lower doped layer and has a light-emitting characteristic; an upper doped layer that is formed on the emitting layer and supplies carriers to the emitting layer; an upper electrode layer formed on the upper doped layer; and a surface structure including a surface pattern formed on the upper electrode layer, a surface structure including an upper electrode pattern and an upper doped pattern formed by patterning the upper electrode layer and the upper doped layer, or a surface structure including the surface pattern, the upper electrode pattern, and upper doped pattern, the surface pattern being formed of a transparent amorphous layer, the surface structure enhancing the light extraction efficiency of light emitted from the emitting layer according to geometric optics.