| abstract |
Disclosed is an device having high light-emitting efficiency. A metal complex represented by the following formula (1). n n n n n n n n n n In the formula (1), n represents an integer of 1 to 3. L A and L B each independently represent the moiety of a group bonded to an iridium atom, except for coordinating atoms. When n is 3, a metal complex represented by the following formula (1-3): n n n n n n n n n n n n wherein Me represents a methyl group) is excluded. |