| abstract |
In a light-emitting element with a light-emitting material, a light-emitting element with high luminous efficiency is provided, comprising: a host material including at least a first molecule and a second molecule, and the first molecule and the second molecule have the same molecular structure; and A phosphorescent material, wherein both the first molecule and the second molecule include: a first skeleton that transports holes; a second skeleton that transports electrons; and a third skeleton, the first skeleton passing through the third skeleton Bonding to the second backbone, and the first molecule and the second molecule form an excited complex. |