The present invention provides a white organic light-emitting element high in the
emission efficiency. In particular, the invention provides a white organic light-emitting element that has an
emission spectrum having peaks in the respective
wavelength regions of red color, green color and blue color and is high in the
emission efficiency. Since a spectrum region lowest in the
emission efficiency is a red region, by introducing a reddish phosphorescent material, a highly efficient white organic light-emitting element is obtained. At this time, in order to inhibit the reddish phosphorescent material from singularly emitting, as shown in FIG. 1, a distance between a second emission region 114 where a reddish phosphorescent material 124 is a
luminescent material and a first emission region 113 that exhibits emission in a shorter
wavelength side than the second emission region is separated. In a configuration shown in FIG.1, it is preferable to use an
electron transport material in a layer 115 between the first emission region and the second emission region and more preferable to use a hole block material.