PHOSPHOR-CONVERTED LIGHT EMITTING DIODE

摘要

A semiconductor light-emitting device, said device comprising a semiconductor chip light source that emits light of a first peak wavelength in the blue wavelength range, and at least a first layer comprising a transparent matrix material, wherein at least one of the layers contains one or more wavelength-converting substances dispersed in the matrix material and converting the blue light from the chip at least partially into light of a second wavelength, such that a mix of light of the first and second wavelength is emitted from the device, wherein the concentration gradient of the wavelength-converting substances is increasing in the downward direction.