Light-emitting element

A light-emitting element, comprising:

• a first anode;
• a first cathode facing the first anode;
• a first light-emitting layer disposed between the first anode and the first cathode, and containing a first light-emitting material;
• a first hole-injection layer disposed between the first anode and the first light-emitting layer, and containing a first inorganic hole-transport material;
• a third organic layer disposed between the first light-emitting layer and the first hole-injection layer;
• a first hole-transport layer disposed between the first light-emitting layer and the third organic layer, and containing a first organic hole-transport material,
• wherein the third organic layer contains a hole-transport compound having:
• R5 containing at an end a functional group capable of chemically bonding to the first inorganic hole-transport material;
• and R6 that is a functional group transporting holes.

A light-emitting element, comprising:

• a first anode;
• a first cathode facing the first anode;
• a first light-emitting layer disposed between the first anode and the first cathode, and containing a first light-emitting material;
• a first hole-injection layer disposed between the first anode and the light-emitting layer, and containing a first inorganic hole-transport material;
• a third organic layer disposed between the light-emitting layer and the first hole-injection layer;
• and
• a first hole-transport layer disposed between the first light-emitting layer and the third organic layer, and containing a first organic hole-transport material
• wherein the third organic layer includes a first compound containing:
• a functional group R5 containing at an end at least one selected from a carboxyl group, a silanol group, a phosphonate group, a thiol group, or an amino group;
• and a functional group R6 having at least one skeleton selected from carbazole, tetracyano, triallylamine, thiophene, fluorine, quinonediimide, phthalocyanine, triphenylene, or phenylnaphthalene.