Phosphor, wavelength conversion device, illumination device, and projector

Abstract

A phosphor includes a phosphor body including a phosphor phase formed of A3B5O12:Ce having a garnet structure, a matrix phase having a refractive index higher than a refractive index of the phosphor phase, and an oxide layer provided between the phosphor phase and the matrix phase. The oxide layer includes a composite oxide of a metal contained in the phosphor phase and a metal contained in the sintering additive. A content of the oxide layer is equal to or more than 0.1 vol % and is equal to or less than 0.9 vol % in a volume ratio with respect to the phosphor body. A is at least one selected from a group including Lu, Gd, Tb, Ga, and Y, and B is Al.

Dependencies are inferred from the claim text.