LIGHT EMITTING DEVICE

PROBLEM TO BE SOLVED: To provide a light emitting device comprising a light emitting element, and a wavelength conversion layer having a phosphor and capable of emitting light with high efficiency. SOLUTION: The light emitting device comprises a light emitting element 3 formed on a substrate 2 and emitting excitation light having a peak wavelength in a range exceeding 450 nm, and a wavelength conversion layer 4 formed to cover the light emitting element and converting the excitation light into visible light, and outputs a part of the excitation light together with the visible light wherein the wavelength conversion layer 4 contains semiconductor ultrafine particles 5 having mean particle size of 10 nm or less. On the surface of semiconductor ultrafine particle 5, a compound consisting of a repetition structure of silicon-oxygen having the number of bonding units of 5-500 is preferably coordinated. COPYRIGHT: (C)2007,JPO&INPIT