| 摘要 |
An organic white light emitting element having a high emission efficiency, especially a highly efficient organic white light emitting element having such an emission spectrum that a peak exists in each wavelength region of red, green and blue. Since the spectral region of the lowest emission efficiency is red region, a highly efficient organic white light emitting element is obtained by introducing a red phosphorescence material. In order to prevent emission of light only from the red phosphorescence material, a second light emitting region (114) employing the red phosphorescence material (124) as a light emitting body is spaced apart from a first light emitting region (113) emitting light on the short wavelength side as compared with the second light emitting region. An electron transporting material is preferably employed in a layer (115) between the first light emitting region and the second light emitting region and a Hall block material is more preferably employed. |
