PHOSPHOR CONVERTED LED WITH TEMPERATURE STABLE FLUX AND SATURATED RED COLOR POINT

摘要

The invention provides a lighting device (100) configured to provide red lighting device light (101), the lighting device (100) comprising: (i) a first light source (1) configured to provide first light source light (111) having a peak wavelength (λ1s); (ii) a first red luminescent material (21) configured to absorb at least part of the first light source light (111) and to convert into first red luminescent material light (221) having a first red emission peak wavelength (λm1), the first red luminescent material (21) having an excitation maximum (λx1); (iii) a second red luminescent material (22) configured to absorb at least part of the first light source light (111) and to convert into second red luminescent material light (221) having a second red emission peak wavelength (λm2), the second red luminescent material (22) having a second excitation maximum (λx2); and wherein the first luminescent material (21) and the second luminescent material (22) are Eu2+ based, and wherein λm1< λm2, λx1< λ1s and λχ2 > λ1s.