Organic electroluminescent element, display device and lighting device
View Patent ↗An organic electroluminescent element containing organic layers sandwiched between an anode and a cathode, wherein the organic layers incorporate an emission layer A containing a host compound A and at least two types of emission dopants, and an emission layer B containing a host compound B and at least one type of emission dopant, provided that at least one of the emission dopants contained in the emission layer A is a phosphorescence-emitting material.
1. An organic electroluminescent element comprising organic layers sandwiched between an anode and a cathode, wherein the organic layers incorporate an emission layer A containing a host compound A and at least two types of emission dopants, and an emission layer B containing a host compound B and at least one type of emission dopant, provided that at least one of the emission dopants contained in the emission layer A is a phosphorescence-emitting material, and
wherein the emission layer A contains a blue light-emitting dopant having a partial structure represented by Formula(1):
wherein X 1 , X 2 , and X 3 each represent a carbon atom or a nitrogen atom; Z1 represents a group of atoms forming a 5-membered aromatic heterocycle; Z2 represents a group of atoms forming a 5-membered or 6-membered aromatic heterocycle or a 6-membered aromatic hydrocarbon ring; and M represents Ir or Pt.
2. The organic electroluminescent element of claim 1 , wherein the organic electroluminescent element emits a white light.
3. A display device comprising the organic electroluminescent element of claim 1 .
4. A lighting device comprising the organic electroluminescent element of claim 1 .