Organic electroluminescent device

An organic electroluminescent device, comprising:

• an anode,
• a cathode, and
• an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a first organic layer, and the first organic layer comprises a first compound and a second compound;
• wherein,
• the highest occupied molecular orbital energy level (EHOMO-A) of the first compound is less than or equal to −5.19 eV and/or the lowest unoccupied molecular orbital energy level (ELUMO-A) of the first compound is less than or equal to −2.31 eV;
• and
• the first compound has a general structure of Ir(La)m(Lb)3-m represented by Formula 1-1;
• wherein m is selected from 0, 1 or 2;
• when m is selected from 0 or 1, a plurality of Lb are the same or different;
• when m is selected from 2, two Lb are the same or different;
• V is selected from the group consisting of O, S, Se, NR, CRR, and SiRR;
• when two R are present, the two R are the same or different;
• X1 to X6 are, at each occurrence identically or differently, selected from CRx;
• Y1 to Y4 are, at each occurrence identically or differently, selected from CRy;
• U1 to U4 are, at each occurrence identically or differently, selected from CRu;
• W1 to W4 are, at each occurrence identically or differently, selected from CRw;
• R, Rx, and Ry 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, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl 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 alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
• Ru and Rw are, at each occurrence identically or differently, selected from the group consisting of:
• hydrogen, deuterium, 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, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted arylalkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl 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 alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, a hydroxyl group, a sulfanyl group, and combinations thereof;
• adjacent substituents R, Ru, Rw, Rx, Ry can be optionally joined to form a ring;
• the lowest unoccupied molecular orbital energy level (ELUMO-B) of the second compound is less than or equal to −2.83 eV;
• and
• the second compound has a structure represented by Formula 2-1:
• wherein,
• L1 to L3 are, at each occurrence identically or differently, selected from a single bond, substituted or unsubstituted alkylene having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkylene having 3 to 20 carbon atoms, substituted or unsubstituted arylene having 6 to 30 carbon atoms, substituted or unsubstituted heteroarylene having 3 to 30 carbon atoms, or combinations thereof;
• Ar1 to Ar3 are, at each occurrence identically or differently, selected from substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, or combinations thereof.