Electroluminescent device

An electroluminescent device, comprising:

• an anode,
• a cathode, and
• an organic layer disposed between the anode and the cathode, wherein the organic layer comprises at least a first compound and a second compound;
• the first compound has a structure of H-L-E;
• H has a structure represented by Formula 1-a:
• in Formula 1-a, A1, A2 and A3 are, at each occurrence identically or differently, selected from CR, and F1 to F10 are, at each occurrence identically or differently, selected from CRf;
• and
• E has a structure represented by Formula 2-d:
• in Formula 2-d, Z2 and Z4 are each independently selected from CRz;
• L is selected from substituted or unsubstituted arylene having 6 to 30 carbon atoms, substituted or unsubstituted heteroarylene having 3 to 30 carbon atoms or a combination thereof;
• R, Rf and Rz are, at each occurrence identically or differently, selected from the group consisting of:
• hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, a cyano group, a hydroxyl group, a sulfanyl group, and combinations thereof;
• and
• adjacent substituents R, Rf can be optionally joined to form a ring;
• the second compound is a metal complex having a general formula of Ir(La)2(Lb);
• wherein,
• La and Lb are a first ligand and a second ligand coordinated to the Ir, respectively;
• La and Lb can be optionally joined to form a multidentate ligand;
• the multiple La may be the same or different;
• the La has a structure represented by Formula 3-1 or Formula 3-3:
• wherein,
• the ring E is selected from a benzene ring;
• Re represents, at each occurrence identically or differently, mono-substitution, multiple substitutions or non-substitution;
• X11 to X14 are, at each occurrence identically or differently, selected from CRx1;
• X31 to X34 are, at each occurrence identically or differently, selected from CRx3;
• Y3 and Y4 are, at each occurrence identically or differently, selected from CRd;
• Rx1, Rx3, Rd and Re are, at each occurrence identically or differently, selected from the group consisting of:
• hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, and combinations thereof;
• adjacent substituents Rx1, Rd and Re can be optionally joined to form a ring;
• when Rx3 is selected from substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, or substituted or unsubstituted amino having 0 to 20 carbon atoms, adjacent substituents Rx3 can be optionally joined to form a ring;
• Lb is selected from the following structure:
• Ra, Rb and Rc represent, at each occurrence identically or differently, mono-substitution, multiple substitutions or non-substitution;
• Xc and Xd are O;
• Ra, Rb and Rc, are, at each occurrence identically or differently, selected from the group consisting of:
• hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, a cyano group, and combinations thereof;
• in structures of Lb, adjacent substituents Ra, Rb, Rc, can be optionally joined to form a ring;
• and, the following case is not comprised:
• the first compound is
• while the second compound is