Light-emitting material comprising orthometalated iridium complex, light-emitting device, high efficiency red light-emitting device, and novel iridium complex

摘要

A compound represented by following formula (23): wherein R11 and R12 each represents a substituent; R13, R14 and R15 each represents a hydrogen atom or a substituent; m1 represents an integer of from 0 to 4; and m2 represents an integer of from 0 to 6.