A luminescent device includes a phosphor layer containing a luminescent inorganic material, first and second dielectric layers rendering the phosphor layer therebetween from the direction perpendicular to the surface, the dielectric layers having residual dielectric polarization in part of at least 3 .mu.C/cm.sup.2 and a coercive electric field of at least 20 kV/cm, and first and second electrodes rendering the first and second dielectric layers therebetween from the direction perpendicular to the surface.