Phosphor mixture of organge/red ZnSe0.5S0.5:Cu,Cl and green BaSrGa4S7:Eu for white phosphor-converted led

摘要

A device and method for emitting output light utilizes orange/red light emitting ZnSe_0.5S_0.5:Cu,Cl phosphor material and green light emitting BaSrGa₄S₇:Eu phosphor material to convert some of the original light emitted from a light source of the device to a longer wavelength light to change the optical spectrum of the output light. The device and method can be used to produce white color light using the light source, which may be a blue light emitting diode (LED) die. The orange/red light emitting ZnSe_0.5S_0.5:Cu,Cl phosphor material and green light emitting BaSrGa₄S₇:Eu phosphor material are included in a wavelength-shifting region optically coupled to the light source.