Wavelength conversion member, manufacturing method therefor, and light-emitting device

Abstract

The invention provides a wavelength conversion member which can draw heat efficiently away from a region that is prone to generating heat under irradiation of light with a high energy density and which can suppress the thermal quenching of phosphor, and provides a method for manufacturing such wavelength conversion members, and a light-emitting device having such a wavelength conversion member. A wavelength conversion member 100 of reflection type is configured to convert light with a specific wavelength to light with other wavelength and also configured to reflect the light on a reflection surface, thereby emitting the light as illumination light, wherein the wavelength conversion member 100 includes a transmissive element 110 including an inorganic material and being optically transmissive, a phosphor layer 120 joined to the transmissive element 110 and including phosphor particles that absorb light and emit converted light and a translucent ceramic that binds the phosphor particles to one another, and a reflector 130 disposed in contact with a side of the phosphor layer 120 opposite to the transmissive element 110 and defining the reflection surface on which the converted light is reflected. With this configuration, heat can be dissipated efficiently from a region that is prone to generating heat under irradiation of light with a high energy density, and the thermal quenching of phosphor can be suppressed.

Dependencies are inferred from the claim text.