Light emitting device

摘要

The white light emitting diode comprising a light emitting component using a semiconductor as a light emitting layer and a phosphor which absorbs a part of light emitted by the light emitting component and emits light of wavelength different from that of the absorbed light, wherein the light emitting layer of the light emitting component is a gallium nitride compound semiconductor which is capable of emitting a blue color light which spectrum has a peak wavelength within the range from 420 to 490 nm and the phosphor contains garnet fluorescent material activated with cerium, which is capable of absorbing a part of the blue color light and emitting a light having an emission spectrum comprising a peak wavelength existing around the range from 510 to 600 nm and tailing to the region from 700 to 750 nm, and
€ƒ€ƒ€ƒ said emission spectrum emitted from the garnet fluorescent material activated with cerium and the spectrum of an unabsorbed light from said LED are capable of overlapping each other to make a white light with a continuous combined spectrum.