| abstract |
A light-emitting device using a phosphor with favorable temperature characteristics is provided. A light-emitting device includes a light-emitting element that emits light with a wavelength of 250 nm to 500 nm and a phosphor layer disposed on the light-emitting element. The phosphor layer is a phosphor having a composition represented by the following composition formula (A) that exhibits a light emission peak between wavelengths 490 nm and 580 nm when excited with light having a wavelength of 250 nm to 500 nm, and has a CuKα characteristic X In X-ray diffraction using a line (wavelength 1.54056Å), 11.81 to 11.85 °, 15.34 to 15.39 °, 20.40 to 20.47 °, 23.74 to 23.86 ° And a phosphor showing a diffraction peak at the same diffraction angle (2θ). MAlSiON (A) (In the compositional formula (A), M is Sr, and 0.1 to 50 mol% thereof is substituted with Eu.) [Selection figure] None |