Light source including wavelength converter

A light source comprising:

• a semiconductor light emitting device;
• and
• a wavelength converter that receives light emitted from the semiconductor light emitting device and emits converted light, the wavelength of the converted light being different from the wavelength of the light from the semiconductor light emitting device, wherein
• the wavelength converter includes:
• a substrate;
• a phosphor layer disposed directly on the substrate and has a first surface facing the substrate and a second surface opposite to the first surface;
• and
• a light reflective layer disposed directly on the second surface of the phosphor layer and has an opening on the second surface, wherein
• the phosphor layer includes phosphor particles and a first matrix material in which the phosphor particles are embedded and dispersed;
• the light reflective layer includes inorganic compound particles and a second matrix material in which the inorganic compound particles are embedded and dispersed;
• the inorganic compound particles have a refractive index higher than a refractive index of the first matrix material, the first matrix material has the refractive index higher than a refractive index of the phosphor particles, and the phosphor particles have the refractive index higher than a refractive index of the second matrix material.