| 摘要 |
PROBLEM TO BE SOLVED: To provide a composition useful for the production of a light emitting element having excellent light emitting efficiency. ! SOLUTION: This invention relates to a composition comprising a compound represented by formula (1) and a phosphorescent compound (Ar1 is a heterocyclic group; D is, for example, a substituent having a structure of a biphenyl derivative substituted with a triazine ring). The phosphorescent compound is an iridium complex represented by the following formula. ! COPYRIGHT: (C)2015,JPO&INPIT |
