| abstract |
A light-emitting element comprising: an anode, a cathode, a first organic layer arranged between the anode and the cathode, and a second organic layer arranged between the anode and the cathode, the first organic layer is obtained by using the formula (H -A) is a layer obtained from a composition of a compound represented by formula (1) and a metal complex represented by the formula (1), and the second organic layer is a layer obtained by using a polymer compound containing a structural unit having a crosslinking group. [In the formula (H-A), Z A represents a group represented by -N(R ZA )-, a sulfur atom, an oxygen atom, etc. R ZA and R Z1 to R Z4 represent a hydrogen atom or a substituent. Among them, at least one of R Z1 to R Z4 is a monovalent heterocyclic group. Z 1 to Z 4 represent carbon atoms or nitrogen atoms. The ring R HA represents an aromatic hydrocarbon ring or an aromatic heterocycle. ] [In the formula (1), M represents an iridium atom, a platinum atom, or the like. n 1 represents an integer of 1 or greater, n 2 represents an integer of 0 or greater, and n 1 +n 2 is 2 or 3. E 1A to E 4A and E 2 represent a nitrogen atom or a carbon atom. R 2A , R 3A and R 4A represent a hydrogen atom or a substituent. Ring R 1A represents a triazole ring. Ring R B represents an aromatic hydrocarbon ring or an aromatic heterocyclic ring. A 1 -G 1 -A 2 represents an anionic bidentate ligand. ]. |