Patent ID: 8337999

Claim:
An organic electroluminescent device comprising: a pair of electrodes; and at least one organic layer between the pair of electrodes, the at least one organic layer including a light-emitting layer, wherein the at least one organic layer includes at least one layer containing an indole derivative represented by formula (12), and the light-emitting layer includes a platinum complex phosphorescent material having a tetradentate ligand: wherein R 202 and R 203 each independently represents a hydrogen atom or an alkyl group, R 204 , R 205 , R 206 and R 207 each represents a hydrogen atom, provided that R 202 and R 203 are not bonded to each other to form an aromatic condensed ring; L 201 represents a linking group having one of the following two structures which may have at least one substituent selected from the group consisting of an alkyl group and an aryl group and wherein * indicates a portion binding to the indole ring of the indole derivative: and n 201 represents 2, wherein the platinum complex phosphorescent material is a compound represented by formula (2): wherein M 21 represents a platinum ion; Q 23 and Q 24 each independently represents an atomic group to coordinate to M 21 , wherein either Q 23 or Q 24 represents an aryl group substituted with an electron attractive group or a 5-membered nitrogen-containing heterocyclic group; L 22 represents a single bond, an alkylene group, an oxygen linking group, or a nitrogen linking group; R 21 and R 22 each independently represents a substituent; and m 21 and m 22 each represents 0, wherein the aryl of said aryl group substituted with an electron attractive group is a phenyl group, wherein the electron attractive group is a fluorine atom, a cyano group, a fluorine-substituted alkyl group, or a fluorine-substituted aryl group, and wherein the 5-membered nitrogen-containing heterocyclic group is pyrrole, imidazole, pyrazole or triazole.