Organic electroluminescent element, lighting device and display device
An organic electroluminescent element having at least one organic layer including a light emitting layer sandwiched between a positive electrode and a negative electrode, which is characterized in that at least one organic layer contains an organometallic complex represented by General Formula (2).
1. An organic electroluminescent element having at least one organic layer including a light emitting layer sandwiched between a positive electrode and a negative electrode,
wherein an organometallic complex represented by the following General Formula (2) is contained in the at least one organic layer,
wherein, Ra, Rc and Rd each independently represent a hydrogen atom or an alkyl group;
na represents an integer of from 1 to 3, nc represents an integer of from 1 to 4, nd represents an integer of from 1 to 2, and one of X and Y is a single bond and the other represents CR1R2, O, or S;
R1 and R2 independently represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, a non-aromatic hydrocarbon ring group or a non-aromatic heterocyclic group;
Re, Rf, and Rg each independently represent an alkyl group, an aromatic hydrocarbon ring group, an aromatic heterocyclic group, a non-aromatic hydrocarbon ring group, or a non-aromatic heterocyclic group; and
m and n represent an integer of from 1 to 2, and m+n is 3;
wherein in no case the structures of three ligands that are coordinated to Ir are identical to each other.
2. The organic electroluminescent element according to claim 1 , wherein Y in the above General Formula (2) is a single bond.
3. The organic electroluminescent element according to claim 1 , wherein X in the above General Formula (2) is O.
4. The organic electroluminescent element according to claim 1 , wherein m=1 in the above General Formula (2).
5. The organic electroluminescent element according to claim 1 , wherein the organic electroluminescent element emits white light.
6. A lighting device equipped with the organic electroluminescent element according to claim 1 .
7. A display device equipped with the organic electroluminescent element according to claim 1 .