| abstract |
Provided is a highly efficient color conversion member obtained by suppressing the fluorescence emitted by a certain type of phosphor from being absorbed again by another type of phosphor, and a light emitting device including the same. A color conversion member formed by sequentially laminating N light-transmitting members each containing N types of phosphors that emit fluorescence in the visible light wavelength region when irradiated with excitation light, N is a natural number of 2 or more, and contains, in order in the thickness direction, a first phosphor having a fluorescence wavelength of λ1, and an Nth fluorescence having a fluorescence wavelength of λN from the first light-transmissive member having a refractive index of n1. A color conversion having a relationship satisfying the general formulas (1) and (2) at the same time by stacking N light transmissive members up to the Nth light transmissive member having a refractive index of nN. It relates to members. λ (M−1) ≧ λM (M is an arbitrary natural number, M ≦ N) (1) n (M−1) <nM (M is an arbitrary natural number, M ≦ N) (2) [Selection] Figure 1 |