Organic electroluminescent devices and metal complex compounds
An organic electroluminescent device, which has a pair of electrodes and at least one organic layer including a luminescent layer between the pair of electrodes, wherein at least one layer between the pair of electrodes comprises at least one metal complex having a tridentate- or higher polydentate-chain structure ligand.
1. An organic electroluminescent device, comprising:
a pair of electrodes and at least one organic layer including a luminescent layer between the pair of electrodes,
wherein at least one layer between the pair of electrodes comprises at least one metal complex represented by formula (12):
wherein, R D3 and R D4 each represent a hydrogen atom or a substituent; R D1 and R D2 each represent a substituent; n D1 and n D2 each represent an integer of 0 to 4; when a plurality of R D1 and R D2 exists, the respective R D1 s or R D2 s may be the same or different from each other, and, respectively, the R D1 s or R D2 s may bond to each other to form a ring; and Y D1 represents a vinylene group that is bonded at the 1- and 2-positions, a pyridine ring, a pyrazine ring, or a pyrimidine ring.
2. The organic electroluminescent device of claim 1 , wherein R D3 and R D4 each represent a hydrogen atom.
3. An organic electroluminescent device, comprising:
a pair of electrodes and at least one organic layer including a luminescent layer between the pair of electrodes,
wherein at least one layer between the pair of electrodes comprises at least one metal complex represented by a compound selected from the group consisting of: